云原生 - Kubernetes (k8s)
根据尚硅谷 K8s 课程制作的笔记内容,使用的是 Ubuntu 虚拟机。
Kubernetes (K8s)
第 1 章 Ubuntu 安装 K8s 集群
Ubutun 20.04 TLS;K8s v1.23.5
master 服务器要求 4CPU 8G,硬盘 20G;2 个 worker 服务器要求 8CPU 16G,硬盘 40G。
1.1 修改主机名
在 master 服务器设置名称为 k8s-master:
sudo hostnamectl set-hostname k8s-master
在 worker 服务器设置名称为 k8s-worker1、k8s-worker2:
sudo hostnamectl set-hostname k8s-worker1
sudo hostnamectl set-hostname k8s-worker2
1.2 解析主机
修改 hosts 文件:
sudo vim /etc/hosts
添加 ip 与主机名的映射:
192.168.234.141 k8s-master
192.168.234.142 k8s-worker1
192.168.234.143 k8s-worker2
1.3 关闭防火墙
sudo systemctl stop ufw.service
sudo systemctl disable ufw.service
1.4 关闭 swap
sudo systemctl stop swap.target
sudo systemctl disable swap.target
sudo systemctl stop swap.img.swap
修改 fstab 文件:
sudo vim /etc/fstab
将下面行注释掉:
/swapfile none swap sw 0 0
重启你的虚拟机,然后查看 swap 是否关闭:
free -m
1.5 开启 IPv4 转发
sudo tee /etc/sysctl.d/k8s.conf <<-'EOF'
net.ipv4.ip_forward = 1
EOF
sudo sysctl -p /etc/sysctl.d/k8s.conf
安装 ipvsadm:
sudo apt install -y ipvsadm
把以下模块都加到内核中:
# 切换为 root 用户
sudo su
sudo cat > /etc/modules-load.d/ipvs.conf << EOF
ip_vs_dh
ip_vs_fo
ip_vs_ftp
ip_vs
ip_vs_lblc
ip_vs_lblcr
ip_vs_lc
ip_vs_mh
ip_vs_nq
ip_vs_ovf
ip_vs_pe_sip
ip_vs_rr
ip_vs_sed
ip_vs_sh
ip_vs_wlc
ip_vs_wrr
nf_conntrack
EOF
systemctl enable --now systemd-modules-load.service
reboot
重启你的虚拟机,然后执行命令:
lsmod | grep ip_vs
1.6 安装 docker
使用脚本安装 docker:
sudo apt install -y curl
curl -fsSL get.docker.com -o get-docker.sh
sudo sh get-docker.sh --mirror Aliyun
然后执行修改 docker 启动项:
mkdir -vp /etc/docker/
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": [
"https://docker.mirrors.ustc.edu.cn",
"https://registry.docker-cn.com"
],
"exec-opts": ["native.cgroupdriver=systemd"],
"storage-driver": "overlay2"
}
EOF
保存后退出,然后启动 docker:
sudo systemctl daemon-reload
sudo systemctl start docker
sudo systemctl enable docker
最后查看 docker 版本:
docker --version
1.7 安装 kubeadm
官方文档:https://kubernetes.io/zh-cn/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
阿里云镜像文档:https://developer.aliyun.com/mirror/kubernetes?spm=a2c6h.13651102.0.0.3e221b11xLY6VN
更新 apt 包索引并安装使用 Kubernetes apt 仓库所需要的包:
sudo apt-get update
sudo apt-get install -y apt-transport-https
安装 GPG 密匙:
sudo su
curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
配置源:
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
开始安装:
sudo apt-get update
sudo apt-get install -y kubelet=1.23.5-00 kubeadm=1.23.5-00 kubectl=1.23.5-00
注意下载的版本不能太高,否则会出现 Initial timeout of 40s passed 的问题,暂时没找到解决办法
启动 kubelet:
sudo systemctl enable kubelet.service
kubeadm version
1.8 初始化 master 节点
在 master 节点上执行以下命令(master ip 换成自己的):
sudo kubeadm init \
--apiserver-advertise-address=192.168.234.141 \
--image-repository registry.cn-hangzhou.aliyuncs.com/google_containers \
--pod-network-cidr=10.244.0.0/16 \
--service-cidr=10.96.0.0/12
参数 | 说明 |
---|---|
–apiserver-advertise-address | 指定 apiserver 的地址 |
–control-plane-endpoint | 控制平面端点,值为主机名 |
–image-repository | 指定镜像仓库 |
–pod-network-cidr | Pod 节点之间网络可以使用的 IP 段,固定使用 10.244.0.0/16 |
–service-cidr | Service 层服务网络 IP 段,固定使用 10.96.0.0/12 |
显示最后 2 行内容进行复制:
kubeadm join 192.168.234.141:6443 --token sp4wi7.fhwy9cm5ye0835lp \
--discovery-token-ca-cert-hash sha256:d86a24672a3aaa6da9c53407f6f6a3317932ebd552c3c7ee59278c03ee01b672
在 master 上以非 root 用户执行:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
在 master 节点上安装 Flannel 网络插件:
curl https://docs.projectcalico.org/archive/v3.20/manifests/calico.yaml -O
不断使用 kubectl get pod -A 命令查看,直到所有服务都是 running 状态。
1.9 worker 节点加入集群
将 master 中的 /etc/kubernetes/admin.conf 文件拷贝到 worker 相同目录下。然后在两个 worker 下执行命令:
echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source ~/.bash_profile
将之间复制的最后 2 行内容打开,在两个 worker 上执行:
kubeadm join 192.168.234.141:6443 --token sp4wi7.fhwy9cm5ye0835lp \
--discovery-token-ca-cert-hash sha256:d86a24672a3aaa6da9c53407f6f6a3317932ebd552c3c7ee59278c03ee01b672
使用 kubectl get nodes 命令查看(大概需要 3-5 分钟):
1.10 安装集群指标监控组件
在 master 根目录下新建 metrics.yaml 文件:
vim metrics.yaml
复制以下内容:
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
spec:
containers:
- args:
- --cert-dir=/tmp
- --kubelet-insecure-tls
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/metrics-server:v0.4.3
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
periodSeconds: 10
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
kubectl apply -f metrics.yaml
# 等待半分钟
kubectl top nodes
kubectl top pods -A
1.11 安装可视化面板
在 master 根目录下新建 dashboard.yaml 文件:
vim dashboard.yaml
复制以下内容:
apiVersion: v1
kind: Namespace
metadata:
name: kubernetes-dashboard
---
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
---
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
ports:
- port: 443
targetPort: 8443
selector:
k8s-app: kubernetes-dashboard
---
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-certs
namespace: kubernetes-dashboard
type: Opaque
---
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-csrf
namespace: kubernetes-dashboard
type: Opaque
data:
csrf: ""
---
apiVersion: v1
kind: Secret
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-key-holder
namespace: kubernetes-dashboard
type: Opaque
---
kind: ConfigMap
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard-settings
namespace: kubernetes-dashboard
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
rules:
- apiGroups: [""]
resources: ["secrets"]
resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
verbs: ["get", "update", "delete"]
- apiGroups: [""]
resources: ["configmaps"]
resourceNames: ["kubernetes-dashboard-settings"]
verbs: ["get", "update"]
- apiGroups: [""]
resources: ["services"]
resourceNames: ["heapster", "dashboard-metrics-scraper"]
verbs: ["proxy"]
- apiGroups: [""]
resources: ["services/proxy"]
resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"]
verbs: ["get"]
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
rules:
- apiGroups: ["metrics.k8s.io"]
resources: ["pods", "nodes"]
verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: kubernetes-dashboard
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kubernetes-dashboard
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: kubernetes-dashboard
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kubernetes-dashboard
---
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: kubernetes-dashboard
template:
metadata:
labels:
k8s-app: kubernetes-dashboard
spec:
containers:
- name: kubernetes-dashboard
image: kubernetesui/dashboard:v2.3.1
imagePullPolicy: Always
ports:
- containerPort: 8443
protocol: TCP
args:
- --auto-generate-certificates
- --namespace=kubernetes-dashboard
volumeMounts:
- name: kubernetes-dashboard-certs
mountPath: /certs
# Create on-disk volume to store exec logs
- mountPath: /tmp
name: tmp-volume
livenessProbe:
httpGet:
scheme: HTTPS
path: /
port: 8443
initialDelaySeconds: 30
timeoutSeconds: 30
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsUser: 1001
runAsGroup: 2001
volumes:
- name: kubernetes-dashboard-certs
secret:
secretName: kubernetes-dashboard-certs
- name: tmp-volume
emptyDir: {}
serviceAccountName: kubernetes-dashboard
nodeSelector:
"kubernetes.io/os": linux
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
---
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: dashboard-metrics-scraper
name: dashboard-metrics-scraper
namespace: kubernetes-dashboard
spec:
ports:
- port: 8000
targetPort: 8000
selector:
k8s-app: dashboard-metrics-scraper
---
kind: Deployment
apiVersion: apps/v1
metadata:
labels:
k8s-app: dashboard-metrics-scraper
name: dashboard-metrics-scraper
namespace: kubernetes-dashboard
spec:
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
k8s-app: dashboard-metrics-scraper
template:
metadata:
labels:
k8s-app: dashboard-metrics-scraper
annotations:
seccomp.security.alpha.kubernetes.io/pod: 'runtime/default'
spec:
containers:
- name: dashboard-metrics-scraper
image: kubernetesui/metrics-scraper:v1.0.6
ports:
- containerPort: 8000
protocol: TCP
livenessProbe:
httpGet:
scheme: HTTP
path: /
port: 8000
initialDelaySeconds: 30
timeoutSeconds: 30
volumeMounts:
- mountPath: /tmp
name: tmp-volume
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
runAsUser: 1001
runAsGroup: 2001
serviceAccountName: kubernetes-dashboard
nodeSelector:
"kubernetes.io/os": linux
tolerations:
- key: node-role.kubernetes.io/master
effect: NoSchedule
volumes:
- name: tmp-volume
emptyDir: {}
kubectl apply -f dashboard.yaml
kubectl get pod -A
等待两个 kubernetes-dashboard 服务都是 running 状态后:
kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard
然后将文件中的 type:Cluster 修改为 type:NodePort。然后运行以下命令查看 kubernetes-dashboard 服务端口(假设这里查到的是 30753):
kubectl get svc -A | grep kubernetes-dashboard
在浏览器输入 K8s 集群任意一台节点的 https://ip:30753 就可以访问,如果出现【你的连接不是专用连接】的警告,键盘输入 thisisunsafe 即可进入页面:
在 master 根目录下新建 dashboard-user.yaml 文件:
vim dashboard-user.yaml
复制以下内容:
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kubernetes-dashboard
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kubernetes-dashboard
kubectl apply -f dashboard-user.yaml
kubectl -n kubernetes-dashboard get secret $(kubectl -n kubernetes-dashboard get sa/admin-user -o jsonpath="{.secrets[0].name}") -o go-template="{{.data.token | base64decode}}"
可以拿到登录 token,在刚才的页面输入即可跳转到以下页面:
第 2 章 使用 KubeKey 部署高可用 K8s 集群
KubeKey(由 Go 语言开发)是一种全新的安装工具。可以使用 KubeKey 仅安装 Kubernetes,也可以同时安装 Kubernetes 和 KubeSphere。
KubeKey 安装要求:
- 2 核 4 GB,20G 存储
- 建议操作系统处于干净状态(不安装任何其他软件),否则可能会发生冲突
- 集群所有节点时钟同步,能够使用 ssh 访问,能够使用 sudo、curl、openssl 命令
- 集群所有节点关闭 selinux
- 集群所有节点关闭防火墙
2.1 负载均衡方案
2.1.1 外部负载均衡
使用 keepalived 和 haproxy 组成的负载均衡方案:
2.1.2 内部负载均衡(推荐)
每个 worker 节点通过 haproxy,把 master 节点控制平面的 apiserver 服务代理到本地, worker 节点中的 kubelet 和 kube-proxy 组件通过本地的地址访问 apiserver。
2.2 搭建高可用 K8s 集群(内部负载均衡)
节点名 | 节点地址 | 节点角色 |
---|---|---|
node1 | 192.168.234.145 | master、etcd |
node2 | 192.168.234.146 | master、etcd |
node3 | 192.168.234.147 | master、etcd |
node4 | 192.168.234.148 | worker |
node5 | 192.168.234.149 | worker |
192.168.234.150 | vip |
2.2.1 检查每个节点安装环境
Ubuntu 初始化配置见 Linux 文档第 8 章。
安装 socat、conntrack、curl:
sudo apt install socat
sudo apt install conntrack
sudo apt install curl -y
检查 selinux 是否关闭,如果显示为 disable 则 selinux 是关闭的:
sudo apt install selinux-utils
getenforce
检查 swap 是否关闭:
sudo systemctl stop swap.target
sudo systemctl disable swap.target
sudo systemctl stop swap.img.swap
# 修改 fstab 文件
sudo vim /etc/fstab
# 将下面行注释掉
/swapfile none swap sw 0 0
# 重启服务器,查看 swap 是否关闭
sudo reboot
free -m
检查防火墙是否关闭:
sudo systemctl stop ufw.service
sudo systemctl disable ufw.service
修改时区:
tzselect
# 我们选择亚洲 Asia,确认之后选择中国(China),最后选择北京(Beijing),选择 1
date -R
# 查看时间是否正确,是否为 +0800 时区
修改 ssh 配置:
sudo vim /etc/ssh/sshd_config
# PasswordAuthentication no 改为 yes,保存更改并重启 sshd 服务
sudo systemctl restart sshd
2.2.2 下载 KubeKey
如果能正常访问 GitHub/Googleapis(多试几次):
curl -sfL https://get-kk.kubesphere.io | VERSION=v3.0.7 sh -
chmod +x kk
如果访问 GitHub/Googleapis 受限:
export KKZONE=cn
curl -sfL https://get-kk.kubesphere.io | VERSION=v3.0.7 sh -
chmod +x kk
查看当前 KubeKey 支持安装哪些 K8s 版本:
./kk version --show-supported-k8s
2.2.3 创建默认配置文件
- –with-kubernetes 指定安装 K8s 集群版本
- -f config.yaml 指定配置文件的名字,如果不指定文件名默认为 config-sample.yaml
./kk create config --with-kubernetes v1.21.5 -f config.yaml
修改 config.yaml:
apiVersion: kubekey.kubesphere.io/v1alpha2
kind: Cluster
metadata:
name: sample
spec:
hosts:
- {name: node1, address: 192.168.234.145, internalAddress: 192.168.234.145, user: root, password: "123"}
- {name: node2, address: 192.168.234.146, internalAddress: 192.168.234.146, user: root, password: "123"}
- {name: node3, address: 192.168.234.147, internalAddress: 192.168.234.147, user: root, password: "123"}
- {name: node4, address: 192.168.234.148, internalAddress: 192.168.234.148, user: root, password: "123"}
- {name: node5, address: 192.168.234.149, internalAddress: 192.168.234.149, user: root, password: "123"}
roleGroups:
etcd:
- node1 # 集群中用作 etcd 节点的所有节点
- node2
- node3
master:
- node1 # 集群中用作 master 的所有节点
- node2
- node3
worker:
- node4 # 集群中用作 worker 的所有节点
- node5
controlPlaneEndpoint:
# 服务器的内部负载均衡器。支持 haproxy, kube-vip
internalLoadbalancer: haproxy
# 负载均衡器默认的内部访问域名是 lb.kubesphere.local
domain: lb.kubesphere.local
# 负载均衡器的 IP 地址。如果在 "kube-vip" 模式下使用 internalLoadblancer,则这里需要一个 VIP。
address: ""
port: 6443
kubernetes:
# Kubernetes 安装版本
version: v1.21.5
# Kubernetes 集群名称
clusterName: cluster.local
# 容器运行时,支持 docker、containd、cri-o、isula,默认 docker
containerManager: docker
etcd:
# 指定集群使用的 etcd 类型。支持 kubekey、kubeadm、external,默认值 kubekey
type: kubekey
network:
plugin: calico
# Pod 子网的有效 CIDR 块
kubePodsCIDR: 10.233.64.0/18
# 服务的有效 CIDR 块
kubeServiceCIDR: 10.233.0.0/18
## multus support. https://github.com/k8snetworkplumbingwg/multus-cni
multusCNI:
enabled: false
registry:
# 配置 Docker 仓库镜像以加速下载
registryMirrors: []
# 设置不安全镜像仓库的地址
insecureRegistries: []
# 用于安装云原生插件(Chart or YAML)
addons: []
2.2.4 使用配置文件创建集群以及 KubeSphere
- –with-kubesphere 指定在安装 K8s 集群的同时安装 kubesphere,如果不指定版本号则会安装最新版本的kubesphere
先保证所有节点服务器已开启,然后执行:
export KKZONE=cn
./kk create cluster -f config.yaml --with-kubesphere v3.2.0
# 输入 yes,剩下就是 15 分钟的等待
2.2.5 使用账密登录
将主节点 node1 中的 /etc/kubernetes/admin.conf 文件拷贝到从节点 node4、node5 相同目录下。然后在两个 worker 下执行命令:
sudo chmod 777 /etc/kubernetes/admin.conf
echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source ~/.bash_profile
2.3 启用应用商店以及其他可插拔组件
- 以 admin 身份登录控制台,点击左上角的【平台管理】 ,选择【集群管理】
- 点击【自定义资源 CRD】 ,在搜索栏中输入 clusterconfiguration,点击结果查看其详细页面
- 在【资源列表】 中,点击【ks-installer】右侧的三个点,选择【编辑配置文件】
- 在该 YAML 文件中,把需要插件的 enabled: false 改为 enabled: true。完成后,点击右下角的【更新】 ,保存配置。
openpitrix:
store:
enabled: true
devops:
enabled: true
logging:
enabled: true
events:
enabled: true
alerting:
enabled: true
auditing:
enabled: true
servicemesh:
enabled: true
network:
networkpolicy:
enabled: true
metrics_server:
enabled: true
network:
ippool:
type: calico # 将 none 更改为 calico
默认情况下,如果启用了日志和事件系统,将会安装内置 Elasticsearch。对于生产环境,如果您想启用事件系统,强烈建议在该 YAML 文件中设置以下值,尤其是 externalElasticsearchUrl 和 externalElasticsearchPort。在文件中提供以下信息后,KubeSphere 将直接对接您的外部 Elasticsearch,不再安装内置 Elasticsearch:
es: # Storage backend for logging, tracing, events and auditing.
elasticsearchMasterReplicas: 1 # The total number of master nodes. Even numbers are not allowed.
elasticsearchDataReplicas: 1 # The total number of data nodes.
elasticsearchMasterVolumeSize: 4Gi # The volume size of Elasticsearch master nodes.
elasticsearchDataVolumeSize: 20Gi # The volume size of Elasticsearch data nodes.
logMaxAge: 7 # Log retention day in built-in Elasticsearch. It is 7 days by default.
elkPrefix: logstash # The string making up index names. The index name will be formatted as ks-<elk_prefix>-log.
externalElasticsearchUrl: # The URL of external Elasticsearch.
externalElasticsearchPort: # The port of external Elasticsearch.
第 3 章 K8s 基础
3.1 K8s 特性
- 服务发现和负载均衡:K8s 可以负载均衡并分配网络流量使部署稳定
- 存储编排:K8s 允许自动挂载选择的存储系统
- 自动部署和回滚:使用 K8s 描述已部署容器
- 自动完成装箱计算:K8s 允许指定每个容器所需 CPU 和内存
- 自我修复:K8s 重新启动失败容器、替换容器、杀死不响应容器,并且在准备好服务之前不通告给客户端
- 密钥和配置管理:允许存储和管理敏感信息,例如密码,OAuth 令牌和 SSH 令牌
3.2 K8s 组件架构(⭐)
3.2.1 控制平面组件(Control Plane Components)
控制平面组件 | 功能 |
---|---|
controller-manager | 在主节点上运行控制器,维持副本期望数 |
apiserver | 所有服务访问的统一入口 |
etcd | K8s 默认的存储系统,主要用于共享配置和服务发现,它通过 Raft 一致性算法处理日志复制以保证强一致性 |
scheduler | 负责接受任务,选择合适的节点分配任务 |
3.2.2 Node 组件
Node 组件 | 功能 |
---|---|
kubelet | 集群中每个节点上运行的代理服务进程,对 Pod 进行创建、调度和维护 |
kube-proxy | 集群中每个节点上运行的网络代理,负责为 Pod 提供服务和负载均衡功能 |
docker | 提供容器运行环境 |
3.2.3 插件(Addons)
插件 | 功能 |
---|---|
CoreDNS | 服务发现,为集群中的服务创建一个域名 IP 的对应关系解析 |
Dashboard | Kubernetes 集群的通用的、基于 Web 的用户界面 |
Ingress Controller | 官方只能实现四层代理,Ingress 可以实现七层代理 |
Prometheus | 监控 k8s 集群 |
ELK | k8s 集群日志统一分析接入平台 |
网络插件 | 实现容器网络接口(CNI)规范的软件组件。它们负责为 Pod 分配 IP 地址,并使这些 Pod 能在集群内部相互通信。 |
3.3 K8s yaml 文件
字段 | 类型 | 说明 |
---|---|---|
apiVersion | String | 定义 api 版本(一般是 v1),可以通过 kubectl api-versions 命令查看 |
kind | String | 定义资源类别,有 Pod、Deployment、Job、Service、Ingress、PersistentVolume等 |
metadata | Object | 定义资源的元数据 |
metadata.name | String | 资源名称 |
metadata.namespace | String | 资源命名空间 |
metadata.labels | Object | 资源的标签,k-v 形式 |
spec | Object | 定义资源所需的参数属性 |
spec.restartPolicy | String | pod 重启策略Always:pod 一旦退出就要进行重启(默认)OnFailure:只有非正常退出才进行重启Nerver:退出后不再拉起 |
spec.hostNetwork | Bool | 是否使用主机网络,默认值 false。设置为 true 表示与主机在同一个网络空间 |
spec.nodeSelector | Object | 标签选择器,k-v 形式 |
容器相关参数 | 类型 | 说明 |
---|---|---|
spec.containers[] | List | 容器对象列表 |
spec.containers[].name | String | 容器的名称 |
spec.containers[].image | String | 容器使用的镜像 |
spec.containers[].imagePullPolicy | String | 镜像拉取策略Always:每次都重新下载IfNotPresent:如果本地存在则使用本地镜像,不重新拉取Never:表示仅使用本地镜像 |
spec.containers[].command[] | List | 指定容器启动命令,可以是多个,如果不指定则使用镜像中启动命令 |
spec.containers[].args[] | List | 启动命令参数,可以是多个 |
spec.containers[].workingDir | String | 指定容器的工作目录 |
容器挂载卷相关参数 | 类型 | 说明 |
---|---|---|
spec.containers[].volumeMounts[] | List | 指定容器的挂载卷,可以多个 |
spec.containers[].volumeMounts[].name | String | 挂载卷名称 |
spec.containers[].volumeMounts[].mountPath | String | 挂载卷路径 |
spec.containers[].volumeMounts[].readOnly | Bool | 读写模式,true 只读(默认),false 读写 |
容器端口相关参数 | 类型 | 说明 |
---|---|---|
spec.containers[].ports[] | List | 指定容器用到的端口列表 |
spec.containers[].ports[].name | String | 指定端口名称 |
spec.containers[].ports[].containerPort | String | 指定端口号 |
spec.containers[].ports[].hostPort | Number | 指定主机需要监听的端口号,默认值和 containerPort 相同 |
spec.containers[].ports[].protocol | String | 监听协议,默认是 tcp |
容器环境相关参数 | 类型 | 说明 |
---|---|---|
spec.containers[].env[] | List | 容器的环境变量列表 |
spec.containers[].env[].name | String | 环境变量名称 |
spec.containers[].env[].value | String | 环境变量值 |
3.4 K8s 命名空间
K8s 命名空间 Namespace 用来对集群资源进行隔离划分,只隔离资源不隔离网络。
3.4.1 常见 Namespace 命令行命令
命令 | 说明 |
---|---|
kubectl get ns | 查看所有名称空间。k8s 会创建三个初始命名空间default:所有未指定命名空间的对象都会被分配在 default 命名空间kube-system:所有由 K8s 系统创建的资源都处于这个命名空间kube-public:此命名空间下的资源可以被所有人访问(包括未认证用户) |
kubectl create ns 命名空间名称 | 创建命名空间 |
kubectl delete ns 命名空间名称 | 删除命名空间 |
kubectl get pods -n kube-system | 查看 kube-system 命名空间的 Pod |
kubectl config set-context --current --namespace=kube-system | 切换至 kube-system 的命名空间 |
3.4.2 使用 yaml 配置文件操作命名空间
创建 hello.yaml 配置文件:
vim hello.yaml
输入以下内容:
apiVersion: v1
kind: Namespace
metadata:
name: hello
labels:
name: hello
使用 yaml 配置文件创建命名空间 hello:
kubectl apply -f hello.yaml
删除对应的 yaml 配置文件即删除该命名空间:
kubectl delete -f hello.yaml
3.5 K8s 容器组 Pod
K8s 为了管理容器,在 Docker 容器上又封装了一层容器组 Pod。Pod 是 K8s 中应用的最小单元,包含一个或多个容器。Pod 中的容器共享同一个 IP 地址和命名空间,共享相同的存储卷和主机资源。
3.5.1 Pod 状态
状态 | 说明 |
---|---|
Pending | 容器组已被节点接受,但由于网络原因还未运行起来 |
Running | Pod 已经绑定到了某个节点,Pod 中所有的容器都已被创建。至少有一个容器仍在运行,或者正处于启动或重启状态 |
Succeeded | Pod 中的所有容器都已成功终止,并且不会再重启 |
Failed | Pod 中的所有容器都已终止,并且至少有一个容器是因为失败终止。也就是说,容器以非 0 状态退出或者被系统终止 |
Unknown | 因为某些原因无法取得 Pod 的状态。这种情况通常是因为与 Pod 所在主机通信失败。 |
当一个 Pod 被删除时,执行一些 kubectl 命令会展示这个 Pod 的状态为 Terminating。 这个状态并不是 Pod 阶段之一。 Pod 被赋予一个可以体面终止的期限,默认为 30 秒
3.5.2 Pod 常用命令行命令
命令 | 说明 |
---|---|
kubectl run Pod名称 --image=镜像名称 [-n 命名空间名称] | 创建一个 Pod(指定命名空间可选) |
kubectl get pod -A | 查看所有 Pod 运行信息 |
kubectl get pod -o wide | 查看所有 Pod 更详细的运行信息 |
kubectl get pod -w | 持续监控 Pod 运行状态 |
kubectl describe pod Pod名称 | 查看某个 Pod 具体状态 |
kubectl logs Pod名称 [-c 容器名] | 查看 Pod 日志 |
kubectl exec -it Pod名称 -c 容器名 /bin/bash | 进入 Pod 中容器终端 |
kubectl delete Pod名称 | 删除 Pod |
3.6 K8s 工作负载
在 K8s 中,我们一般不直接创建 Pod,而是通过工作负载如 Deployment、StatefulSet、DaemonSet、Job / CronJob, 为 Pod 提供水平伸缩,版本更新,故障恢复等能力。
Deployment 使 Pod 拥有多副本,自愈,扩缩容等能力。deployment 命令有:
创建、扩缩容、删除命令 | 说明 |
---|---|
kubectl create deploy deployment名 --image=镜像名 | 创建 deployment |
kubectl create deploy deployment名 --image=镜像名 --replicas=3 | 创建 3 份 deployment |
kubectl scale deploy/deployment名 --replicas=5 | 扩容到 5 份 deployment |
kubectl scale deploy/ --replicas=2 | 缩容到 2 份 deployment |
kubectl get deploy | 查看创建的 deployment |
kubectl delete deploy deployment名 | 删除 deployment |
应用的更新一般就是镜像版本的更新:
滚动更新命令 | 说明 |
---|---|
kubectl set image deploy/deployment名 镜像名=镜像名:版本号 --record | 滚动更新镜像版本 |
kubectl get deploy/deployment名 -oyaml | grep image |
kubectl rollout history deploy/deployment名 | 查看版本历史记录 |
kubectl rollout undo deploy/deployment名 --to-revision=版本号 | 回退到指定版本 |
kubectl rollout undo deploy/deployment名 | 回退到上个版本 |
3.7 K8s 服务
3.7.1 Service 服务访问
Service 是将一组 Pod 公开为网络服务的抽象方法,实现 Pod 的网络服务发现与负载均衡。
命令 | 说明 |
---|---|
kubectl get svc | 查看所有服务 |
kubectl expose deploy deployment名 --port=对外服务端口号 --target-port=Pod端口号 --type=ClusterIP | 只对集群内暴露服务(ClusterIP) |
kubectl expose deploy deployment名 --port=对外服务端口号 --target-port=Pod端口号 --type=NodePort | 对集群外也暴露服务(NodePort) |
3.7.2 Ingress 统一网关入口
Ingress 是 Service 的统一网关入口,底层实际上就是反向代理 nginx,通过域名、路径匹配规则指向不同的 Service:
在 master 节点上安装 Ingress:
vim ingress.yaml
apiVersion: v1
kind: Namespace
metadata:
name: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
---
# Source: ingress-nginx/templates/controller-serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx
namespace: ingress-nginx
automountServiceAccountToken: true
---
# Source: ingress-nginx/templates/controller-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx-controller
namespace: ingress-nginx
data:
allow-snippet-annotations: 'true'
---
# Source: ingress-nginx/templates/clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
name: ingress-nginx
rules:
- apiGroups:
- ''
resources:
- configmaps
- endpoints
- nodes
- pods
- secrets
- namespaces
verbs:
- list
- watch
- apiGroups:
- ''
resources:
- nodes
verbs:
- get
- apiGroups:
- ''
resources:
- services
verbs:
- get
- list
- watch
- apiGroups:
- networking.k8s.io
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- ''
resources:
- events
verbs:
- create
- patch
- apiGroups:
- networking.k8s.io
resources:
- ingresses/status
verbs:
- update
- apiGroups:
- networking.k8s.io
resources:
- ingressclasses
verbs:
- get
- list
- watch
---
# Source: ingress-nginx/templates/clusterrolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
name: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: ingress-nginx
subjects:
- kind: ServiceAccount
name: ingress-nginx
namespace: ingress-nginx
---
# Source: ingress-nginx/templates/controller-role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx
namespace: ingress-nginx
rules:
- apiGroups:
- ''
resources:
- namespaces
verbs:
- get
- apiGroups:
- ''
resources:
- configmaps
- pods
- secrets
- endpoints
verbs:
- get
- list
- watch
- apiGroups:
- ''
resources:
- services
verbs:
- get
- list
- watch
- apiGroups:
- networking.k8s.io
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- networking.k8s.io
resources:
- ingresses/status
verbs:
- update
- apiGroups:
- networking.k8s.io
resources:
- ingressclasses
verbs:
- get
- list
- watch
- apiGroups:
- ''
resources:
- configmaps
resourceNames:
- ingress-controller-leader
verbs:
- get
- update
- apiGroups:
- ''
resources:
- configmaps
verbs:
- create
- apiGroups:
- ''
resources:
- events
verbs:
- create
- patch
---
# Source: ingress-nginx/templates/controller-rolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx
namespace: ingress-nginx
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: ingress-nginx
subjects:
- kind: ServiceAccount
name: ingress-nginx
namespace: ingress-nginx
---
# Source: ingress-nginx/templates/controller-service-webhook.yaml
apiVersion: v1
kind: Service
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx-controller-admission
namespace: ingress-nginx
spec:
type: ClusterIP
ports:
- name: https-webhook
port: 443
targetPort: webhook
appProtocol: https
selector:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/component: controller
---
# Source: ingress-nginx/templates/controller-service.yaml
apiVersion: v1
kind: Service
metadata:
annotations:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx-controller
namespace: ingress-nginx
spec:
type: NodePort
ports:
- name: http
port: 80
protocol: TCP
targetPort: http
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/component: controller
---
# Source: ingress-nginx/templates/controller-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx-controller
namespace: ingress-nginx
spec:
selector:
matchLabels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/component: controller
revisionHistoryLimit: 10
minReadySeconds: 0
template:
metadata:
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/component: controller
spec:
dnsPolicy: ClusterFirst
containers:
- name: controller
image: registry.cn-hangzhou.aliyuncs.com/google_containers/nginx-ingress-controller:v1.1.1
imagePullPolicy: IfNotPresent
lifecycle:
preStop:
exec:
command:
- /wait-shutdown
args:
- /nginx-ingress-controller
- --publish-service=$(POD_NAMESPACE)/ingress-nginx-controller
- --election-id=ingress-controller-leader
- --controller-class=k8s.io/ingress-nginx
- --configmap=$(POD_NAMESPACE)/ingress-nginx-controller
- --validating-webhook=:8443
- --validating-webhook-certificate=/usr/local/certificates/cert
- --validating-webhook-key=/usr/local/certificates/key
securityContext:
capabilities:
drop:
- ALL
add:
- NET_BIND_SERVICE
runAsUser: 101
allowPrivilegeEscalation: true
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
- name: LD_PRELOAD
value: /usr/local/lib/libmimalloc.so
livenessProbe:
failureThreshold: 5
httpGet:
path: /healthz
port: 10254
scheme: HTTP
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
readinessProbe:
failureThreshold: 3
httpGet:
path: /healthz
port: 10254
scheme: HTTP
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
ports:
- name: http
containerPort: 80
hostPort: 80
protocol: TCP
- name: https
hostPort: 443
containerPort: 443
protocol: TCP
- name: webhook
containerPort: 8443
protocol: TCP
volumeMounts:
- name: webhook-cert
mountPath: /usr/local/certificates/
readOnly: true
resources:
requests:
cpu: 100m
memory: 90Mi
nodeSelector:
kubernetes.io/os: linux
serviceAccountName: ingress-nginx
terminationGracePeriodSeconds: 300
volumes:
- name: webhook-cert
secret:
secretName: ingress-nginx-admission
---
# Source: ingress-nginx/templates/controller-ingressclass.yaml
# We don't support namespaced ingressClass yet
# So a ClusterRole and a ClusterRoleBinding is required
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: nginx
namespace: ingress-nginx
spec:
controller: k8s.io/ingress-nginx
---
# Source: ingress-nginx/templates/admission-webhooks/validating-webhook.yaml
# before changing this value, check the required kubernetes version
# https://kubernetes.io/docs/reference/access-authn-authz/extensible-admission-controllers/#prerequisites
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
name: ingress-nginx-admission
webhooks:
- name: validate.nginx.ingress.kubernetes.io
matchPolicy: Equivalent
rules:
- apiGroups:
- networking.k8s.io
apiVersions:
- v1
operations:
- CREATE
- UPDATE
resources:
- ingresses
failurePolicy: Fail
sideEffects: None
admissionReviewVersions:
- v1
clientConfig:
service:
namespace: ingress-nginx
name: ingress-nginx-controller-admission
path: /networking/v1/ingresses
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/serviceaccount.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
name: ingress-nginx-admission
namespace: ingress-nginx
annotations:
helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: ingress-nginx-admission
annotations:
helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
rules:
- apiGroups:
- admissionregistration.k8s.io
resources:
- validatingwebhookconfigurations
verbs:
- get
- update
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/clusterrolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: ingress-nginx-admission
annotations:
helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: ingress-nginx-admission
subjects:
- kind: ServiceAccount
name: ingress-nginx-admission
namespace: ingress-nginx
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: ingress-nginx-admission
namespace: ingress-nginx
annotations:
helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
rules:
- apiGroups:
- ''
resources:
- secrets
verbs:
- get
- create
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/rolebinding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: ingress-nginx-admission
namespace: ingress-nginx
annotations:
helm.sh/hook: pre-install,pre-upgrade,post-install,post-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: ingress-nginx-admission
subjects:
- kind: ServiceAccount
name: ingress-nginx-admission
namespace: ingress-nginx
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/job-createSecret.yaml
apiVersion: batch/v1
kind: Job
metadata:
name: ingress-nginx-admission-create
namespace: ingress-nginx
annotations:
helm.sh/hook: pre-install,pre-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
spec:
template:
metadata:
name: ingress-nginx-admission-create
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
spec:
containers:
- name: create
image: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-webhook-certgen:v1.1.1
imagePullPolicy: IfNotPresent
args:
- create
- --host=ingress-nginx-controller-admission,ingress-nginx-controller-admission.$(POD_NAMESPACE).svc
- --namespace=$(POD_NAMESPACE)
- --secret-name=ingress-nginx-admission
env:
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
securityContext:
allowPrivilegeEscalation: false
restartPolicy: OnFailure
serviceAccountName: ingress-nginx-admission
nodeSelector:
kubernetes.io/os: linux
securityContext:
runAsNonRoot: true
runAsUser: 2000
---
# Source: ingress-nginx/templates/admission-webhooks/job-patch/job-patchWebhook.yaml
apiVersion: batch/v1
kind: Job
metadata:
name: ingress-nginx-admission-patch
namespace: ingress-nginx
annotations:
helm.sh/hook: post-install,post-upgrade
helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
spec:
template:
metadata:
name: ingress-nginx-admission-patch
labels:
helm.sh/chart: ingress-nginx-4.0.15
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 1.1.1
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: admission-webhook
spec:
containers:
- name: patch
image: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-webhook-certgen:v1.1.1
imagePullPolicy: IfNotPresent
args:
- patch
- --webhook-name=ingress-nginx-admission
- --namespace=$(POD_NAMESPACE)
- --patch-mutating=false
- --secret-name=ingress-nginx-admission
- --patch-failure-policy=Fail
env:
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
securityContext:
allowPrivilegeEscalation: false
restartPolicy: OnFailure
serviceAccountName: ingress-nginx-admission
nodeSelector:
kubernetes.io/os: linux
securityContext:
runAsNonRoot: true
runAsUser: 2000
kubectl apply -f ingress.yaml
kubectl get pod -A
获取 Ingress 暴露端口:
kubectl get svc -A
外部浏览器可以通过集群任意 ip:30266 以及 https://ip:31192 访问。
3.8 K8s 存储抽象
3.8.1 nfs 存储系统
我们知道 Docker 中保存容器数据的方法是挂载数据卷。但是在 k8s 中,如果我们 3 号机器上的某个 Pod 节点(黑色)宕机,根据故障转移 k8s 在 2 号机器再启动该节点。但是原来 3 号机器挂载的目录无法转移到 2 号机器上,造成数据存储丢失。
k8s 使用存储层统一管理所有 Pod 挂载的目录。 以 nfs 存储层为例,它在某个机器下创建 /nfs/data 目录用于挂载数据,在其他机器中都存在备份目录 /bak/data。只要 Pod 在一台机器上挂载了数据,该数据都会同步到其他机器上,这就叫做存储抽象。
3.8.2 PV & PVC 目录挂载
PV:持久卷(Persistent Volume),将应用需要持久化的数据保存到指定位置
PVC:持久卷申明(Persistent Volume Claim),申明需要使用的持久卷规格
k8s 使用 PV & PVC 方式进行数据挂载。Pod 想要挂载多大的空间,先使用 PVC 申请 PV 空间。如果 Pod 被删除,PVC 随之被删除,对应的 PV 空间也被回收。
3.9 K8s ConfigMap
ConfigMap 可以抽取应用配置,并且可以自动更新,被多个 Pod 共享,非常适合配置文件类的数据挂载
3.9.1 把配置文件创建为配置集
在 master 根目录下创建 Redis 的配置文件:
vim redis.conf
redis.conf 中的内容为:
appendonly yes
将该配置文件创建为名为 redis-conf 的配置集,创建过后配置文件可以删除:
kubectl create cm redis-conf --from-file=redis.conf
kubectl get cm redis-conf -o yaml
rm -rf redis.conf
3.9.2 创建 Pod
在 master 根目录下创建 redis.yaml,内容如下:
apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
containers:
- name: redis
image: redis
command:
- redis-server
- "/redis-master/redis.conf"
ports:
- containerPort: 6379
volumeMounts:
- mountPath: /data
name: data # 20-21 行为 data 挂载配置
- mountPath: /redis-master
name: config # 22-27 行为 config 挂载配置
volumes:
- name: data
emptyDir: {}
- name: config
configMap:
name: redis-conf
items:
- key: redis.conf
path: redis.conf
kubectl apply -f redis.yaml
kubectl get pod
等待名为 redis 的 Pod 状态为 running 后,进入 redis 容器查看我们的配置:
kubectl exec -it redis -- redis-cli
127.0.0.1:6379> CONFIG GET appendonly
127.0.0.1:6379> exit
如果我们修改配置文件:
kubectl edit cm redis-conf
做一些配置修改后退出保存。进入 redis 容器查看我们的配置值未更改,需要重新启动 redis Pod 才能从关联的 ConfigMap 中获取更新的值。 因为我们的 Pod 部署的中间件自己本身没有热更新能力。
3.10 Secret 服务敏感配置文件
Secret 对象类型用来保存敏感信息,例如密码、OAuth 令牌和 SSH 密钥,将这些信息放在 Secret 中比放在 Pod 的定义或者容器镜像中来说更加安全和灵活
正常来说,我们不能下载一个镜像仓库里的私有镜像,但是我们可以通过 K8s 的 Secret 服务惊醒密钥配置。
在 K8s 中,创建一个 Secret 如下:
kubectl create secret docker-registry 密钥名 \
--docker-server=<镜像仓库服务器名> \
--docker-username=<镜像仓库用户名> \
--docker-password=<镜像仓库密码> \
--docker-email=<镜像仓库邮箱地址>
kubectl get secret 密钥名 -o yaml
然后,我们可以使用该密钥去拉取镜像,来创建 Pod:
apiVersion: v1
kind: Pod
metadata:
name: Pod名
spec:
containers:
- name: 容器名
image: 镜像仓库名/私有镜像:版本号
imagePullSecrets:
- name: 密钥名
第 4 章 K8s 集群上安装 KubeSphere(v3.3.2)
- Kubernetes 版本必须为:v1.20.x、v1.21.x、* v1.22.x、* v1.23.x 和 * v1.24.x
- 确保您的机器满足最低硬件要求:master 4 核 8 G,worker 8 核 16 G
- 在安装之前,需要配置 Kubernetes 集群中的默认存储类型
4.1 安装默认存储类型
在每个节点上安装 nfs 服务器:
sudo apt install -y nfs-kernel-server
在 master 节点上执行以下命令:
sudo su
echo "/nfs/data/ *(insecure,rw,sync,no_root_squash)" > /etc/exports
mkdir -p /nfs/data
systemctl enable rpcbind
systemctl enable nfs-server
systemctl start rpcbind
systemctl start nfs-server
exportfs -r
exportfs
出现以下内容即为成功:
在 worker 节点上执行以下命令(ip 换成自己 master 的 ip):
showmount -e 192.168.234.141
sudo mkdir -p /nfs/data
sudo mount -t nfs 192.168.234.141:/nfs/data /nfs/data
在 master 节点上创建 sc.yaml(注释地方进行修改):
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: nfs-storage
annotations:
storageclass.kubernetes.io/is-default-class: "true"
provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
parameters:
archiveOnDelete: "true"
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: nfs-client-provisioner
labels:
app: nfs-client-provisioner
namespace: default
spec:
replicas: 1
strategy:
type: Recreate
selector:
matchLabels:
app: nfs-client-provisioner
template:
metadata:
labels:
app: nfs-client-provisioner
spec:
serviceAccountName: nfs-client-provisioner
containers:
- name: nfs-client-provisioner
image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/nfs-subdir-external-provisioner:v4.0.2
volumeMounts:
- name: nfs-client-root
mountPath: /persistentvolumes
env:
- name: PROVISIONER_NAME
value: k8s-sigs.io/nfs-subdir-external-provisioner
- name: NFS_SERVER
value: 192.168.234.141 ## 指定自己 nfs 服务器地址(主节点ip)
- name: NFS_PATH
value: /nfs/data ## nfs服务器共享的目录
volumes:
- name: nfs-client-root
nfs:
server: 192.168.234.141 ## 指定自己 nfs 服务器地址(主节点ip)
path: /nfs/data
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: nfs-client-provisioner
namespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: nfs-client-provisioner-runner
rules:
- apiGroups: [""]
resources: ["nodes"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["persistentvolumes"]
verbs: ["get", "list", "watch", "create", "delete"]
- apiGroups: [""]
resources: ["persistentvolumeclaims"]
verbs: ["get", "list", "watch", "update"]
- apiGroups: ["storage.k8s.io"]
resources: ["storageclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["events"]
verbs: ["create", "update", "patch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: run-nfs-client-provisioner
subjects:
- kind: ServiceAccount
name: nfs-client-provisioner
namespace: default
roleRef:
kind: ClusterRole
name: nfs-client-provisioner-runner
apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: leader-locking-nfs-client-provisioner
namespace: default
rules:
- apiGroups: [""]
resources: ["endpoints"]
verbs: ["get", "list", "watch", "create", "update", "patch"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: leader-locking-nfs-client-provisioner
namespace: default
subjects:
- kind: ServiceAccount
name: nfs-client-provisioner
namespace: default
roleRef:
kind: Role
name: leader-locking-nfs-client-provisioner
apiGroup: rbac.authorization.k8s.io
kubectl apply -f sc.yaml
kubectl get sc
4.2 部署 KubeSphere
在 master 上:
wget https://github.com/kubesphere/ks-installer/releases/download/v3.3.2/kubesphere-installer.yaml
wget https://github.com/kubesphere/ks-installer/releases/download/v3.3.2/cluster-configuration.yaml
4.3 修改 cluster-configuration.yaml
---
apiVersion: installer.kubesphere.io/v1alpha1
kind: ClusterConfiguration
metadata:
name: ks-installer
namespace: kubesphere-system
labels:
version: v3.3.2
spec:
persistence:
storageClass: ""
authentication:
jwtSecret: ""
local_registry: ""
etcd:
monitoring: true
endpointIps: 192.168.234.141 ## 改为自己 master 的 ip
port: 2379
tlsEnable: true
common:
core:
console:
enableMultiLogin: true
port: 30880
type: NodePort
redis:
enabled: true
enableHA: false
volumeSize: 2Gi # Redis PVC size.
openldap:
enabled: true
volumeSize: 2Gi # openldap PVC size.
minio:
volumeSize: 20Gi # Minio PVC size.
monitoring:
endpoint: http://prometheus-operated.kubesphere-monitoring-system.svc:9090
GPUMonitoring:
enabled: false
gpu:
kinds:
- resourceName: "nvidia.com/gpu"
resourceType: "GPU"
default: true
es:
logMaxAge: 7
elkPrefix: logstash
basicAuth:
enabled: false
username: ""
password: ""
externalElasticsearchHost: ""
externalElasticsearchPort: ""
alerting:
enabled: true
auditing:
enabled: true
devops:
enabled: true
jenkinsMemoryLim: 2Gi
jenkinsMemoryReq: 1500Mi
jenkinsVolumeSize: 8Gi
jenkinsJavaOpts_Xms: 512m
jenkinsJavaOpts_Xmx: 512m
jenkinsJavaOpts_MaxRAM: 2g
events:
enabled: true
logging:
enabled: true
logsidecar:
enabled: true
replicas: 2
metrics_server:
enabled: false
monitoring:
storageClass: ""
node_exporter:
port: 9100
gpu:
nvidia_dcgm_exporter:
enabled: false
multicluster:
clusterRole: none
network:
networkpolicy:
enabled: true
ippool:
type: calico
topology:
type: none
openpitrix:
store:
enabled: true
servicemesh:
enabled: true
istio:
components:
ingressGateways:
- name: istio-ingressgateway
enabled: true
cni:
enabled: true
edgeruntime:
enabled: false
kubeedge:
enabled: false
cloudCore:
cloudHub:
advertiseAddress:
- ""
service:
cloudhubNodePort: "30000"
cloudhubQuicNodePort: "30001"
cloudhubHttpsNodePort: "30002"
cloudstreamNodePort: "30003"
tunnelNodePort: "30004"
iptables-manager:
enabled: true
mode: "external"
gatekeeper:
enabled: false
terminal:
timeout: 600
---
apiVersion: installer.kubesphere.io/v1alpha1
kind: ClusterConfiguration
metadata:
name: ks-installer
namespace: kubesphere-system
labels:
version: v3.1.1
spec:
persistence:
storageClass: ""
authentication:
jwtSecret: ""
local_registry: ""
etcd:
monitoring: true
endpointIps: 192.168.234.141 ## 改为自己 master 的 ip
port: 2379
tlsEnable: true
common:
redis:
enabled: true
openldap:
enabled: true
minioVolumeSize: 20Gi
openldapVolumeSize: 2Gi
redisVolumSize: 2Gi
monitoring:
# type: external
endpoint: http://prometheus-operated.kubesphere-monitoring-system.svc:9090
es:
# elasticsearchMasterReplicas: 1
# elasticsearchDataReplicas: 1
elasticsearchMasterVolumeSize: 4Gi
elasticsearchDataVolumeSize: 20Gi
logMaxAge: 7
elkPrefix: logstash
basicAuth:
enabled: false
username: ""
password: ""
externalElasticsearchUrl: ""
externalElasticsearchPort: ""
console:
enableMultiLogin: true
port: 30880
alerting:
enabled: true
# thanosruler:
# replicas: 1
# resources: {}
auditing:
enabled: true
devops:
enabled: true
jenkinsMemoryLim: 2Gi
jenkinsMemoryReq: 1500Mi
jenkinsVolumeSize: 8Gi
jenkinsJavaOpts_Xms: 512m
jenkinsJavaOpts_Xmx: 512m
jenkinsJavaOpts_MaxRAM: 2g
events:
enabled: true
ruler:
enabled: true
replicas: 2
logging:
enabled: true
logsidecar:
enabled: true
replicas: 2
metrics_server:
enabled: false
monitoring:
storageClass: ""
# prometheusReplicas: 1
prometheusMemoryRequest: 400Mi
prometheusVolumeSize: 20Gi
# alertmanagerReplicas: 1
multicluster:
clusterRole: none
network:
networkpolicy:
enabled: true
ippool:
type: calico
topology:
type: none
openpitrix:
store:
enabled: true
servicemesh:
enabled: true
kubeedge:
enabled: false
cloudCore:
nodeSelector: {"node-role.kubernetes.io/worker": ""}
tolerations: []
cloudhubPort: "10000"
cloudhubQuicPort: "10001"
cloudhubHttpsPort: "10002"
cloudstreamPort: "10003"
tunnelPort: "10004"
cloudHub:
advertiseAddress:
- ""
nodeLimit: "100"
service:
cloudhubNodePort: "30000"
cloudhubQuicNodePort: "30001"
cloudhubHttpsNodePort: "30002"
cloudstreamNodePort: "30003"
tunnelNodePort: "30004"
edgeWatcher:
nodeSelector: {"node-role.kubernetes.io/worker": ""}
tolerations: []
edgeWatcherAgent:
nodeSelector: {"node-role.kubernetes.io/worker": ""}
tolerations: []
kubectl apply -f kubesphere-installer.yaml
# 等待大概需要 3 分钟安装好
kubectl get pod -A
kubectl apply -f cluster-configuration.yaml
# 查看 kubesphere-system 安装进程(大概 5-10 分钟)
kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l 'app in (ks-install, ks-installer)' -o jsonpath='{.items[0].metadata.name}') -f
jenkins 反复重启问题修复:https://ask.kubesphere.io/forum/d/9252-331-jenkins
# 解决 etcd 监控证书找不到问题
kubectl -n kubesphere-monitoring-system create secret generic kube-etcd-client-certs --from-file=etcd-client-ca.crt=/etc/kubernetes/pki/etcd/ca.crt --from-file=etcd-client.crt=/etc/kubernetes/pki/apiserver-etcd-client.crt --from-file=etcd-client.key=/etc/kubernetes/pki/apiserver-etcd-client.key
kubectl get pod -A
# 查看每个 Pod 具体状态,如果是在 Pulling image 就只能等待
kubectl describe pod -n [NAMESPACE] [NAME]
4.4 访问 KubeSphere
拿机器的公网 IP:30880 访问 KubeSphere 网页,使用以下默认账户和密码登录访问 KubeSphere 网页:
4.5 安装后启用可插拔组件
- 点击左上角的「平台管理」 ,然后选择「集群管理」。
- 点击「自定义资源 CRD」,然后在搜索栏中输入 clusterconfiguration
- 在资源列表中,点击 ks-installer 右侧的三个点,然后选择「编辑配置文件」
- 在该配置文件中,将所需组件 enabled 的 false 更改为 true,以启用要安装的组件。完成后点击「更新」
- 等待组件安装成功,登录 KubeSphere 控制台,在「服务组件」中可以查看不同组件的状态
配置项 | 功能组件 | 描述 |
---|---|---|
alerting | 告警系统 | 使用户能够自定义告警策略,及时向接收器发送告警信息 |
auditing | 审计日志系统 | 记录了平台上不同租户的活动 |
devops | DevOps 系统 | 基于 Jenkins 提供开箱即用的 CI/CD 功能,提供一站式 DevOps 方案,内置 Jenkins 流水线与 B2I & S2I |
events | 事件系统 | 导出、过滤和警告多租户 Kubernetes 集群中的 Kubernetes 事件 |
logging | 日志系统 | 在统一的控制台中提供灵活的日志查询、收集和管理功能 |
metrics_server | HPA | 根据设定指标对 Pod 数量进行动态伸缩,使运行在上面的服务对指标的变化有一定的自适应能力 |
networkpolicy | 网络策略 | 可以在同一个集群内部之间设置网络策略 |
notification | 通知系统 | 允许用户将警告信息发送出来的告警通知到电子邮件、企业微信和 Slack |
openpitrix | 应用商店 | 基于 Helm 的应用程序商店,允许用户管理应用整个生命周期 |
servicemesh | 服务网格 (基于 Istio) | 支持灰度发布、流量拓扑、流量治理、流量跟踪 |
第 5 章 KubeSphere 实战
5.1 多租户系统实战
5.1.1 创建企业空间管理员
使用平台管理员 platform-admin 身份登录 KubeSphere。点击「平台管理」->「访问控制」->「用户」->「创建」:
5.1.2 创建企业空间人员
使用平台管理员 platform-admin 身份登录。点击「平台管理」->「访问控制」->「用户」->「创建」多个人员:
5.1.3 创建企业空间
使用企业空间管理员 boss 身份登录,创建企业空间:
5.1.4 邀请人员进入企业空间
使用企业空间管理员 boss 身份登录,点击创建的企业空间 ->「企业空间设置」->「企业空间成员」->「邀请」以下成员进入企业空间:
5.1.5 创建项目并邀请成员
使用项目总监 pm-he 身份登录,点击「项目」 ->「创建」:
点击进入创建好的一个项目 -> 点击「项目设置」 ->「项目成员」->「邀请」:
5.2 添加应用仓库
使用深圳分公司的管理员 shenzhen-boss 身份登录,点击「应用管理」->「应用仓库」-> 「添加」:
等待应用仓库同步成功。
5.3 部署中间件
中间件 | 集群内地址 | 外部访问地址 |
---|---|---|
MySQL | his-mysql.his:3306 | 192.168.234.141:32029 |
Redis | his-redis.his:6379 | 192.168.234.141:31325 |
RabbitMQ | his-rabbitmq.his:5672 | 192.168.234.141:30764 |
Sentinel | his-sentinel.his:8080 | 192.168.234.141:31402 |
MongoDB | his-mongodb.his:27017 | 192.168.234.141:30345 |
RabbitMQ | his-rabbitmq.his:5672 | 192.168.234.141:30764 |
ElasticSearch | his-es.his:9200 | 192.168.234.141:31402 |
5.3.1 MySQL
- 创建配置文件
点击进入项目 ->【配置】->【配置字典】->【创建】:
- 【名称】填 【mysql-conf】
- 【添加数据】-> 【键】填 【my.cnf】 -> 【值】填
[client]
default-character-set=utf8mb4
[mysql]
default-character-set=utf8mb4
[mysqld]
init_connect='SET collation_connection = utf8mb4_unicode_ci'
init_connect='SET NAMES utf8mb4'
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
skip-character-set-client-handshake
skip-name-resolve
lower_case_table_names=1
- 创建 StatefulSet
点击【应用负载】->【工作负载】->【有状态副本集】->【创建】:
- 创建 ClusterIp 和 NodePort 两种服务
- ClusterIp:
- NodePort:
5.3.2 Redis
- 创建配置文件
点击【配置】->【配置字典】->【创建】:
- 【名称】填 【redis-conf】
- 【添加数据】-> 【键】填 【redis.conf】 -> 【值】填
appendonly yes
port 6379
bind 0.0.0.0
- 创建 StatefulSet
点击【应用负载】->【工作负载】->【有状态副本集】->【创建】:
- 创建 ClusterIp 和 NodePort 两种服务:与 MySQL 同理
5.3.3 elasticSearch
- 创建配置文件
点击进入项目 ->「配置」->「配置字典」->「创建」:
- 【名称】填 【es-conf】
- 【添加数据】-> 【键】填 【elasticsearch.yml】 -> 【值】填
cluster.name: "docker-cluster"
network.host: 0.0.0.0
- 【添加数据】-> 【键】填 【jvm.options】 -> 【值】填
8-13:-XX:+UseConcMarkSweepGC
8-13:-XX:CMSInitiatingOccupancyFraction=75
8-13:-XX:+UseCMSInitiatingOccupancyOnly
14-:-XX:+UseG1GC
## JVM temporary directory
-Djava.io.tmpdir=${ES_TMPDIR}
## heap dumps
# generate a heap dump when an allocation from the Java heap fails; heap dumps
# are created in the working directory of the JVM unless an alternative path is
# specified
-XX:+HeapDumpOnOutOfMemoryError
# specify an alternative path for heap dumps; ensure the directory exists and
# has sufficient space
-XX:HeapDumpPath=data
# specify an alternative path for JVM fatal error logs
-XX:ErrorFile=logs/hs_err_pid%p.log
## JDK 8 GC logging
8:-XX:+PrintGCDetails
8:-XX:+PrintGCDateStamps
8:-XX:+PrintTenuringDistribution
8:-XX:+PrintGCApplicationStoppedTime
8:-Xloggc:logs/gc.log
8:-XX:+UseGCLogFileRotation
8:-XX:NumberOfGCLogFiles=32
8:-XX:GCLogFileSize=64m
# JDK 9+ GC logging
9-:-Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m
- 创建 StatefulSet
点击【应用负载】->【工作负载】->【有状态副本集】->【创建】:
- 创建 ClusterIp 和 NodePort 两种服务
- ClusterIp:
- NodePort:
5.3.4 rabbitmq
点击左上角【应用商店】-> 选择【RabbitMQ】->【安装】->【创建】:
5.3.5 MongoDB
点击【应用负载】->【应用】->【创建】->【从应用模板】->【应用仓库】选择【bitnami】-> 搜索【mongo】-> 选择【mongodb】->【安装】-> 【名称】填【mongodb】-> 【下一步】-> 取消勾选【Enable Authentication】->【安装】。
创建 mongodb 的 CLusterIP 和 NodePort 服务同上。
更多推荐
所有评论(0)