1，环境部署
1.1.1 硬件信息
| lb | k8s-master-lb | 192.168.2.99 |
| master/node | k8s-master01/k8s-node01/k8s-node01 | 192.168.2.100~102 |
| nfs | k8s-node01 | 192.168.2.101 |
1.2 安装前准备
1.2.1 配置时区
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
ntpdate time.windows.com
1.2.2 下载常用命令
yum -y install vim tree wget lrzsz
1.2.3 配置登录超时以及历史显示格式
cat << EOF >> /etc/profile
###########################
export TMOUT=1800
export PS1='\[\e[32;1m\][\u@\h \W]\$ \[\e[0m\]'
export HISTTIMEFORMAT="`whoami`_%F %T : "
alias grep='grep --color=auto'
EOF
1.2.4 配置yum源
mkdir /etc/yum.repos.d/bak
cp /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak/
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
# 删除已安装的Docker
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-selinux \
docker-engine-selinux \
docker-engine
# 安装 docker-ce 使用命令
yum install -y yum-utils device-mapper-persistent-data lvm2
# 配置docker-ce 官方源
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
# 配置docker-ce 阿里云源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
yum makecache
yum update -y
1.2.5 设置SELINUX为permissive模式
vi /etc/selinux/config
SELINUX=permissive
setenforce 0
1.2.6 设置iptables参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
sysctl --system
1.2.7 禁用swap
swapoff -a
# 禁用fstab中的swap项目
vi /etc/fstab
#/dev/mapper/centos-swap swap swap defaults 0 0
# 确认swap已经被禁用
cat /proc/swaps
Filename Type Size Used Priority
1.2.8 limit配置
ulimit -SHn 65535
1.2.9 hosts文件配置
cat << EOF >> /etc/hosts
192.168.2.99 k8s-master-lb
192.168.2.100 k8s-master01
192.168.2.101 k8s-node01
192.168.2.102 k8s-node02
EOF
[root@k8s-master01 ~]# more /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.2.99 k8s-master-lb
192.168.2.100 k8s-master01
192.168.2.101 k8s-node01
192.168.2.102 k8s-node02
1.2.10 所有节点加载ipvs模块
modprobe ip_vs
modprobe ip_vs_rr
modprobe ip_vs_wrr
modprobe ip_vs_sh
modprobe nf_conntrack_ipv4
1.2.11 重启主机
reboot
1.3 kubernetes安装
1.3.1 firewalld和iptables相关端口设置
systemctl enable firewalld
systemctl restart firewalld
systemctl status firewalld
| TCP | Inbound | 16443* | Load balancer Kubernetes API server port |
| TCP | Inbound | 6443* | Kubernetes API server |
| TCP | Inbound | 4001 | etcd listen client port |
| TCP | Inbound | 2379-2380 | etcd server client API |
| TCP | Inbound | 10250 | Kubelet API |
| TCP | Inbound | 10251 | kube-scheduler |
| TCP | Inbound | 10252 | kube-controller-manager |
| TCP | Inbound | 10255 | Read-only Kubelet API (Deprecated) |
| TCP | Inbound | 30000-32767 | NodePort Services |
firewall-cmd --zone=public --add-port=16443/tcp --permanent
firewall-cmd --zone=public --add-port=6443/tcp --permanent
firewall-cmd --zone=public --add-port=4001/tcp --permanent
firewall-cmd --zone=public --add-port=2379-2380/tcp --permanent
firewall-cmd --zone=public --add-port=10250/tcp --permanent
firewall-cmd --zone=public --add-port=10251/tcp --permanent
firewall-cmd --zone=public --add-port=10252/tcp --permanent
firewall-cmd --zone=public --add-port=30000-32767/tcp --permanent
firewall-cmd --reload
firewall-cmd --list-all --zone=public
[root@k8s-master01 ~]# firewall-cmd --list-all --zone=public
public (active)
target: default
icmp-block-inversion: no
interfaces: ens160
sources:
services: ssh dhcpv6-client
ports: 16443/tcp 6443/tcp 4001/tcp 2379-2380/tcp 10250/tcp 10251/tcp 10252/tcp 30000-32767/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
| TCP | Inbound | 10250 | Kubelet API |
| TCP | Inbound | 30000-32767 | NodePort Services |
firewall-cmd --zone=public --add-port=10250/tcp --permanent
firewall-cmd --zone=public --add-port=30000-32767/tcp --permanent
firewall-cmd --reload
firewall-cmd --list-all --zone=public
[root@k8s-node01 ~]# firewall-cmd --list-all --zone=public
public (active)
target: default
icmp-block-inversion: no
interfaces: ens2f1 ens1f0 nm-bond
sources:
services: ssh dhcpv6-client
ports: 10250/tcp 30000-32767/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:
- 在所有kubernetes节点上允许kube-proxy的forward
firewall-cmd --permanent --direct --add-rule ipv4 filter INPUT 1 -i docker0 -j ACCEPT -m comment --comment "kube-proxy redirects"
firewall-cmd --permanent --direct --add-rule ipv4 filter FORWARD 1 -o docker0 -j ACCEPT -m comment --comment "docker subnet"
firewall-cmd --reload
[root@k8s-master01 ~]# firewall-cmd --direct --get-all-rules
ipv4 filter INPUT 1 -i docker0 -j ACCEPT -m comment --comment 'kube-proxy redirects'
ipv4 filter FORWARD 1 -o docker0 -j ACCEPT -m comment --comment 'docker subnet'
systemctl restart firewalld
- 解决kube-proxy无法启用nodePort，重启firewalld必须执行以下命令，在所有节点设置定时任务
[root@k8s-master01 ~]# crontab -l
# 解决kube-proxy无法启用nodePort
*/5 * * * * /usr/sbin/iptables -D INPUT -j REJECT --reject-with icmp-host-prohibited
1.3.2 安装 docker-ce
# 要先安装docker-ce-selinux-17.03.2.ce，否则安装 docker-ce-17.03.2.ce-1.el7.centos 会报错
yum install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm -y
# 指定版本安装 docker-ce （推荐）
yum install -y docker-ce-17.03.2.ce-1.el7.centos
yum list docker-ce --showduplicates | sort -r
systemctl enable docker && systemctl start docker
[root@k8s-master01 ~]# docker version
Client:
Version: 17.03.2-ce
API version: 1.27
Go version: go1.7.5
Git commit: f5ec1e2
Built: Tue Jun 27 02:21:36 2017
OS/Arch: linux/amd64
Server:
Version: 17.03.2-ce
API version: 1.27 (minimum version 1.12)
Go version: go1.7.5
Git commit: f5ec1e2
Built: Tue Jun 27 02:21:36 2017
OS/Arch: linux/amd64
Experimental: false
1.3.3 安装 kubernetes
yum install -y kubelet-1.12.3-0.x86_64 kubeadm-1.12.3-0.x86_64 kubectl-1.12.3-0.x86_64
# 配置kubelet使用国内pause镜像
# 配置kubelet的cgroups
# 获取docker的cgroups
DOCKER_CGROUPS=$(docker info | grep 'Cgroup' | cut -d' ' -f3)
echo $DOCKER_CGROUPS
cat >/etc/sysconfig/kubelet<<EOF
KUBELET_EXTRA_ARGS="--cgroup-driver=$DOCKER_CGROUPS --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"
EOF
systemctl daemon-reload
systemctl enable kubelet && systemctl start kubelet
1.3.4 在所有master节点安装并启动keepalived及docker-compose
yum install -y keepalived docker-compose
systemctl enable keepalived && systemctl restart keepalived
1.3.5 所有master节点互信
[root@k8s-master01 ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:kj9fwIGc8OEgkjmbYN4xn5QJIfzbCpdhAHSNdYedSQo root@k8s-master01
The key's randomart image is:
+---[RSA 2048]----+
|=o.*BE=.=oo |
|.+*= *oBoB |
|o.++= ..* . |
| .o= o . . . |
| . = o S o |
| . + . o . |
| o . o . |
| . o . |
| . |
+----[SHA256]-----+
You have new mail in /var/spool/mail/root
[root@k8s-master01 ~]# for i in k8s-master01 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: ".ssh/id_rsa.pub"
The authenticity of host 'k8s-master01 (192.168.2.100)' can't be established.
ECDSA key fingerprint is SHA256:6ql+t72p2Y0as39Vva8wxF/LFCF7YihQI3frNk3Y7Ns.
ECDSA key fingerprint is MD5:8c:0b:2f:85:e1:e8:49:c9:a7:82:a7:c6:33:dc:b2:02.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@k8s-master01's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'k8s-master01'"
and check to make sure that only the key(s) you wanted were added.
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: ".ssh/id_rsa.pub"
The authenticity of host 'k8s-node01 (192.168.2.101)' can't be established.
ECDSA key fingerprint is SHA256:u7n4RdHb4VQUuR6+EzanduelF4fQHYEg+i84qUU7HMM.
ECDSA key fingerprint is MD5:17:a8:af:1d:d0:54:6a:f6:cf:8c:08:0c:c0:39:41:55.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@k8s-node01's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'k8s-node01'"
and check to make sure that only the key(s) you wanted were added.
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: ".ssh/id_rsa.pub"
The authenticity of host 'k8s-node02 (192.168.2.102)' can't be established.
ECDSA key fingerprint is SHA256:qWdrqlPd4GRmWQ2uOemQWrXrlOJE+R/lbMK5wif3wiQ.
ECDSA key fingerprint is MD5:15:b4:ff:5e:e8:4e:f3:c2:ac:07:13:bd:b3:35:90:96.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@k8s-node02's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'k8s-node02'"
and check to make sure that only the key(s) you wanted were added.
1.4 高可用安装基本配置
1.4.1 以下操作在master01
yum install git -y
git clone https://github.com/xiaoqshuo/k8-ha-install.git
- 修改对应的配置信息，注意nm-bond修改为服务器对应网卡名称
[root@k8s-master01 k8-ha-install]# more create-config.sh
#!/bin/bash
#######################################
# set variables below to create the config files, all files will create at ./config directory
#######################################
# master keepalived virtual ip address
export K8SHA_VIP=192.168.2.99
# master01 ip address
export K8SHA_IP1=192.168.2.100
# node01 ip address
export K8SHA_IP2=192.168.2.101
# node02 ip address
export K8SHA_IP2=192.168.2.102
# master keepalived virtual ip hostname
export K8SHA_VHOST=k8s-master-lb
# master01 hostname
export K8SHA_HOST1=k8s-master01
# node01 hostname
export K8SHA_HOST2=k8s-node01
# node02 hostname
export K8SHA_HOST2=k8s-node02
# master01 network interface name
export K8SHA_NETINF1=ens160
# master02 network interface name
export K8SHA_NETINF2=ens160
# master03 network interface name
export K8SHA_NETINF3=ens160
# keepalived auth_pass config
export K8SHA_KEEPALIVED_AUTH=412f7dc3bfed32194d1600c483e10ad1d
# calico reachable ip address
export K8SHA_CALICO_REACHABLE_IP=192.168.2.1
# kubernetes CIDR pod subnet, if CIDR pod subnet is "172.168.0.0/16" please set to "172.168.0.0"
export K8SHA_CIDR=172.168.0.0
- 创建3个master节点的kubeadm配置文件，keepalived配置文件，nginx负载均衡配置文件，以及calico配置文件
[root@k8s-master01 k8-ha]# ./create-config.sh
create kubeadm-config.yaml files success. config/k8s-master01/kubeadm-config.yaml
create kubeadm-config.yaml files success. config/k8s-node02/kubeadm-config.yaml
create kubeadm-config.yaml files success. config//kubeadm-config.yaml
create keepalived files success. config/k8s-master01/keepalived/
create keepalived files success. config/k8s-node02/keepalived/
create keepalived files success. config//keepalived/
create nginx-lb files success. config/k8s-master01/nginx-lb/
create nginx-lb files success. config/k8s-node02/nginx-lb/
create nginx-lb files success. config//nginx-lb/
create calico.yaml file success. calico/calico.yaml
cat >> /etc/profile << EOF
# 设置相关hostname变量
export HOST1=k8s-master01
export HOST2=k8s-node01
export HOST3=k8s-node02
EOF
- 把kubeadm配置文件放到各个master节点的/root/目录
scp -r config/$HOST1/kubeadm-config.yaml $HOST1:/root/
scp -r config/$HOST2/kubeadm-config.yaml $HOST2:/root/
scp -r config/$HOST3/kubeadm-config.yaml $HOST3:/root/
- 把keepalived配置文件放到各个master节点的/etc/keepalived/目录
scp -r config/$HOST1/keepalived/* $HOST1:/etc/keepalived/
scp -r config/$HOST2/keepalived/* $HOST2:/etc/keepalived/
scp -r config/$HOST3/keepalived/* $HOST3:/etc/keepalived/
- 把nginx负载均衡配置文件放到各个master节点的/root/目录
scp -r config/$HOST1/nginx-lb $HOST1:/root/
scp -r config/$HOST2/nginx-lb $HOST2:/root/
scp -r config/$HOST3/nginx-lb $HOST3:/root/
1.4.2 以下操作在所有master操作
# 修改nginx-lb下的nginx配置文件
proxy_connect_timeout 60s;proxy_timeout 10m;
# 启动nginx-lb
docker-compose --file=/root/nginx-lb/docker-compose.yaml up -d
# 查看容器状态
docker-compose --file=/root/nginx-lb/docker-compose.yaml ps
[root@k8s-master01 ~]# more /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
# 注释健康检查
#vrrp_script chk_apiserver {
# script "/etc/keepalived/check_apiserver.sh"
# interval 2
# weight -5
# fall 3
# rise 2
#}
vrrp_instance VI_1 {
state MASTER
interface nm-bond
mcast_src_ip 192.168.2.100
virtual_router_id 51
priority 102
advert_int 2
authentication {
auth_type PASS
auth_pass 412f7dc3bfed32194d1600c483e10ad1d
}
virtual_ipaddress {
192.168.2.99
}
track_script {
chk_apiserver
}
}
- 重启keepalived，并确认能ping通虚拟IP
systemctl restart keepalived
[root@k8s-master01 ~]# ping 192.168.2.99
PING 192.168.2.99 (192.168.2.99) 56(84) bytes of data.
64 bytes from 192.168.2.99: icmp_seq=1 ttl=64 time=0.035 ms
64 bytes from 192.168.2.99: icmp_seq=2 ttl=64 time=0.032 ms
64 bytes from 192.168.2.99: icmp_seq=3 ttl=64 time=0.030 ms
64 bytes from 192.168.2.99: icmp_seq=4 ttl=64 time=0.032 ms
64 bytes from 192.168.2.99: icmp_seq=5 ttl=64 time=0.037 ms
64 bytes from 192.168.2.99: icmp_seq=6 ttl=64 time=0.032 ms
- 修改kubeadm-config.yaml，注意：此时是在原有基础上添加了imageRepository、controllerManagerExtraArgs和api，其中advertiseAddress为每个master本机IP
[root@k8s-master01 ~]# more kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1alpha2
kind: MasterConfiguration
kubernetesVersion: v1.12.3
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
apiServerCertSANs:
- k8s-master01
- k8s-node01
- k8s-node02
- k8s-master-lb
- 192.168.2.100
- 192.168.2.101
- 192.168.2.102
- 192.168.2.99
api:
advertiseAddress: 192.168.2.100
controlPlaneEndpoint: 192.168.2.99:16443
etcd:
local:
extraArgs:
listen-client-urls: "https://127.0.0.1:2379,https://192.168.2.100:2379"
advertise-client-urls: "https://192.168.2.100:2379"
listen-peer-urls: "https://192.168.2.100:2380"
initial-advertise-peer-urls: "https://192.168.2.100:2380"
initial-cluster: "k8s-master01=https://192.168.2.100:2380"
serverCertSANs:
- k8s-master01
- 192.168.2.100
peerCertSANs:
- k8s-master01
- 192.168.2.100
controllerManagerExtraArgs:
node-monitor-grace-period: 10s
pod-eviction-timeout: 10s
networking:
# This CIDR is a Calico default. Substitute or remove for your CNI provider.
podSubnet: "172.168.0.0/16"
1.4.2 以下操作在master01操作
kubeadm config images pull --config /root/kubeadm-config.yaml
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1
kubeadm init --config /root/kubeadm-config.yaml
[root@k8s-master01 ~]# kubeadm init --config /root/kubeadm-config.yaml
kubeadm init --config /root/kubeadm-config.yaml
[init] using Kubernetes version: v1.12.3
[preflight] running pre-flight checks
[WARNING Firewalld]: firewalld is active, please ensure ports [6443 10250] are open or your cluster may not function correctly
[preflight/images] Pulling images required for setting up a Kubernetes cluster
[preflight/images] This might take a minute or two, depending on the speed of your internet connection
[preflight/images] You can also perform this action in beforehand using 'kubeadm config images pull'
[kubelet] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[preflight] Activating the kubelet service
[certificates] Generated etcd/ca certificate and key.
[certificates] Generated etcd/server certificate and key.
[certificates] etcd/server serving cert is signed for DNS names [k8s-master01 localhost k8s-master01] and IPs [127.0.0.1 ::1 192.168.2.100]
[certificates] Generated etcd/peer certificate and key.
[certificates] etcd/peer serving cert is signed for DNS names [k8s-master01 localhost k8s-master01] and IPs [192.168.2.100 127.0.0.1 ::1 192.168.2.100]
[certificates] Generated etcd/healthcheck-client certificate and key.
[certificates] Generated apiserver-etcd-client certificate and key.
[certificates] Generated ca certificate and key.
[certificates] Generated apiserver-kubelet-client certificate and key.
[certificates] Generated apiserver certificate and key.
[certificates] apiserver serving cert is signed for DNS names [k8s-master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local k8s-master01 k8s-node01 k8s-node02 k8s-master-lb] and IPs [10.96.0.1 192.168.2.100 192.168.2.99 192.168.2.100 192.168.2.101 192.168.2.102 192.168.2.99]
[certificates] Generated front-proxy-ca certificate and key.
[certificates] Generated front-proxy-client certificate and key.
[certificates] valid certificates and keys now exist in "/etc/kubernetes/pki"
[certificates] Generated sa key and public key.
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/admin.conf"
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/kubelet.conf"
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/controller-manager.conf"
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/scheduler.conf"
[controlplane] wrote Static Pod manifest for component kube-apiserver to "/etc/kubernetes/manifests/kube-apiserver.yaml"
[controlplane] wrote Static Pod manifest for component kube-controller-manager to "/etc/kubernetes/manifests/kube-controller-manager.yaml"
[controlplane] wrote Static Pod manifest for component kube-scheduler to "/etc/kubernetes/manifests/kube-scheduler.yaml"
[etcd] Wrote Static Pod manifest for a local etcd instance to "/etc/kubernetes/manifests/etcd.yaml"
[init] waiting for the kubelet to boot up the control plane as Static Pods from directory "/etc/kubernetes/manifests"
[init] this might take a minute or longer if the control plane images have to be pulled
[apiclient] All control plane components are healthy after 32.519847 seconds
[uploadconfig] storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.12" in namespace kube-system with the configuration for the kubelets in the cluster
[markmaster] Marking the node k8s-master01 as master by adding the label "node-role.kubernetes.io/master=''"
[markmaster] Marking the node k8s-master01 as master by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[patchnode] Uploading the CRI Socket information "/var/run/dockershim.sock" to the Node API object "k8s-master01" as an annotation
[bootstraptoken] using token: 1s1g4k.rsnrw7t1njkjz6zk
[bootstraptoken] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstraptoken] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstraptoken] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstraptoken] creating the "cluster-info" ConfigMap in the "kube-public" namespace
[addons] Applied essential addon: CoreDNS
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[addons] Applied essential addon: kube-proxy
Your Kubernetes master has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
You can now join any number of machines by running the following on each node
as root:
kubeadm join 192.168.2.99:16443 --token 1s1g4k.rsnrw7t1njkjz6zk --discovery-token-ca-cert-hash sha256:357d5c7da9a3dc6edd8edda2dded629913fd601151a571fb020ae5f8cbf19224
1.4.3 所有master节点配置变量
cat <<EOF >> ~/.bashrc
export KUBECONFIG=/etc/kubernetes/admin.conf
EOF
source ~/.bashrc
[root@k8s-master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady master 3m35s v1.12.3
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
coredns-6c66ffc55b-8rlpp 0/1 Pending 0 3m36s <none> <none> <none>
coredns-6c66ffc55b-qdvfg 0/1 Pending 0 3m36s <none> <none> <none>
etcd-k8s-master01 1/1 Running 0 3m4s 192.168.2.100 k8s-master01 <none>
kube-apiserver-k8s-master01 1/1 Running 0 2m52s 192.168.2.100 k8s-master01 <none>
kube-controller-manager-k8s-master01 1/1 Running 0 3m6s 192.168.2.100 k8s-master01 <none>
kube-proxy-jsnhl 1/1 Running 0 3m36s 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-master01 1/1 Running 0 3m1s 192.168.2.100 k8s-master01 <none>
- 注：网络插件未安装，所以coredns状态为Pending
1.5 高可用配置
1.5.1 以下操作在master01
USER=root
CONTROL_PLANE_IPS="k8s-node01 k8s-node02"
for host in $CONTROL_PLANE_IPS; do
ssh "${USER}"@$host "mkdir -p /etc/kubernetes/pki/etcd"
scp /etc/kubernetes/pki/ca.crt "${USER}"@$host:/etc/kubernetes/pki/ca.crt
scp /etc/kubernetes/pki/ca.key "${USER}"@$host:/etc/kubernetes/pki/ca.key
scp /etc/kubernetes/pki/sa.key "${USER}"@$host:/etc/kubernetes/pki/sa.key
scp /etc/kubernetes/pki/sa.pub "${USER}"@$host:/etc/kubernetes/pki/sa.pub
scp /etc/kubernetes/pki/front-proxy-ca.crt "${USER}"@$host:/etc/kubernetes/pki/front-proxy-ca.crt
scp /etc/kubernetes/pki/front-proxy-ca.key "${USER}"@$host:/etc/kubernetes/pki/front-proxy-ca.key
scp /etc/kubernetes/pki/etcd/ca.crt "${USER}"@$host:/etc/kubernetes/pki/etcd/ca.crt
scp /etc/kubernetes/pki/etcd/ca.key "${USER}"@$host:/etc/kubernetes/pki/etcd/ca.key
scp /etc/kubernetes/admin.conf "${USER}"@$host:/etc/kubernetes/admin.conf
done
1.5.2 以下操作在master02(node01)
- 把node01加入集群
- 修改kubeadm-config.yaml 如下
[root@k8s-node01 ~]# more kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1alpha2
kind: MasterConfiguration
kubernetesVersion: v1.12.3
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
apiServerCertSANs:
- k8s-master01
- k8s-node01
- k8s-node02
- k8s-master-lb
- 192.168.2.100
- 192.168.2.101
- 192.168.2.102
- 192.168.2.99
api:
advertiseAddress: 192.168.2.101
controlPlaneEndpoint: 192.168.2.99:16443
etcd:
local:
extraArgs:
listen-client-urls: "https://127.0.0.1:2379,https://192.168.2.101:2379"
advertise-client-urls: "https://192.168.2.101:2379"
listen-peer-urls: "https://192.168.2.101:2380"
initial-advertise-peer-urls: "https://192.168.2.101:2380"
initial-cluster: "k8s-master01=https://192.168.2.100:2380,k8s-node01=https://192.168.2.101:2380"
initial-cluster-state: existing
serverCertSANs:
- k8s-node01
- 192.168.2.101
peerCertSANs:
- k8s-node01
- 192.168.2.101
controllerManagerExtraArgs:
node-monitor-grace-period: 10s
pod-eviction-timeout: 10s
networking:
# This CIDR is a calico default. Substitute or remove for your CNI provider.
podSubnet: "172.168.0.0/16"
kubeadm config images pull --config /root/kubeadm-config.yaml
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1
kubeadm alpha phase certs all --config /root/kubeadm-config.yaml
kubeadm alpha phase kubeconfig controller-manager --config /root/kubeadm-config.yaml
kubeadm alpha phase kubeconfig scheduler --config /root/kubeadm-config.yaml
kubeadm alpha phase kubelet config write-to-disk --config /root/kubeadm-config.yaml
kubeadm alpha phase kubelet write-env-file --config /root/kubeadm-config.yaml
kubeadm alpha phase kubeconfig kubelet --config /root/kubeadm-config.yaml
systemctl restart kubelet
- 设置k8s-master01以及k8s-node01的HOSTNAME以及地址
export CP0_IP=192.168.2.100
export CP0_HOSTNAME=k8s-master01
export CP1_IP=192.168.2.101
export CP1_HOSTNAME=k8s-node01
kubectl exec -n kube-system etcd-${CP0_HOSTNAME} -- etcdctl --ca-file /etc/kubernetes/pki/etcd/ca.crt --cert-file /etc/kubernetes/pki/etcd/peer.crt --key-file /etc/kubernetes/pki/etcd/peer.key --endpoints=https://${CP0_IP}:2379 member add ${CP1_HOSTNAME} https://${CP1_IP}:2380
[root@k8s-node01 ~]# kubectl exec -n kube-system etcd-${CP0_HOSTNAME} -- etcdctl --ca-file /etc/kubernetes/pki/etcd/ca.crt --cert-file /etc/kubernetes/pki/etcd/peer.crt --key-file /etc/kubernetes/pki/etcd/peer.key --endpoints=https://${CP0_IP}:2379 member add ${CP1_HOSTNAME} https://${CP1_IP}:2380
Added member named k8s-node01 with ID eeb43c3071ab6260 to cluster
ETCD_NAME="k8s-node01"
ETCD_INITIAL_CLUSTER="k8s-master01=https://192.168.2.100:2380,k8s-node01=https://192.168.2.101:2380"
ETCD_INITIAL_CLUSTER_STATE="existing"
kubeadm alpha phase etcd local --config /root/kubeadm-config.yaml
[root@k8s-node01 ~]# kubeadm alpha phase etcd local --config /root/kubeadm-config.yaml
[etcd] Wrote Static Pod manifest for a local etcd instance to "/etc/kubernetes/manifests/etcd.yaml"
kubeadm alpha phase kubeconfig all --config /root/kubeadm-config.yaml
kubeadm alpha phase controlplane all --config /root/kubeadm-config.yaml
kubeadm alpha phase mark-master --config /root/kubeadm-config.yaml
1.5.2 以下操作在master03(node02)
- 把node02加入集群
- 修改kubeadm-config.yaml 如下
[root@k8s-node02 ~]# more kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1alpha2
kind: MasterConfiguration
kubernetesVersion: v1.12.3
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
apiServerCertSANs:
- k8s-master01
- k8s-node01
- k8s-node02
- k8s-master-lb
- 192.168.2.100
- 192.168.2.101
- 192.168.2.102
- 192.168.2.99
api:
advertiseAddress: 192.168.2.102
controlPlaneEndpoint: 192.168.2.99:16443
etcd:
local:
extraArgs:
listen-client-urls: "https://127.0.0.1:2379,https://192.168.2.102:2379"
advertise-client-urls: "https://192.168.2.102:2379"
listen-peer-urls: "https://192.168.2.102:2380"
initial-advertise-peer-urls: "https://192.168.2.102:2380"
initial-cluster: "k8s-master01=https://192.168.2.100:2380,k8s-node01=https://192.168.2.101:2380,k8s-node02=https://192.168.2.102:2380"
initial-cluster-state: existing
serverCertSANs:
- k8s-node02
- 192.168.2.102
peerCertSANs:
- k8s-node02
- 192.168.2.102
controllerManagerExtraArgs:
node-monitor-grace-period: 10s
pod-eviction-timeout: 10s
networking:
# This CIDR is a calico default. Substitute or remove for your CNI provider.
podSubnet: "172.168.0.0/16"
kubeadm config images pull --config /root/kubeadm-config.yaml
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1
kubeadm alpha phase certs all --config /root/kubeadm-config.yaml
kubeadm alpha phase kubeconfig controller-manager --config /root/kubeadm-config.yaml
kubeadm alpha phase kubeconfig scheduler --config /root/kubeadm-config.yaml
kubeadm alpha phase kubelet config write-to-disk --config /root/kubeadm-config.yaml
kubeadm alpha phase kubelet write-env-file --config /root/kubeadm-config.yaml
kubeadm alpha phase kubeconfig kubelet --config /root/kubeadm-config.yaml
systemctl restart kubelet
- 设置k8s-master01以及k8s-node01的HOSTNAME以及地址
export CP0_IP=192.168.2.100
export CP0_HOSTNAME=k8s-master01
export CP2_IP=192.168.2.102
export CP2_HOSTNAME=k8s-node02
kubectl exec -n kube-system etcd-${CP0_HOSTNAME} -- etcdctl --ca-file /etc/kubernetes/pki/etcd/ca.crt --cert-file /etc/kubernetes/pki/etcd/peer.crt --key-file /etc/kubernetes/pki/etcd/peer.key --endpoints=https://${CP0_IP}:2379 member add ${CP2_HOSTNAME} https://${CP2_IP}:2380
[root@k8s-node02 ~]# kubectl exec -n kube-system etcd-${CP0_HOSTNAME} -- etcdctl --ca-file /etc/kubernetes/pki/etcd/ca.crt --cert-file /etc/kubernetes/pki/etcd/peer.crt --key-file /etc/kubernetes/pki/etcd/peer.key --endpoints=https://${CP0_IP}:2379 member add ${CP2_HOSTNAME} https://${CP2_IP}:2380
Added member named k8s-node02 with ID ce5849fac4f917df to cluster
ETCD_NAME="k8s-node02"
ETCD_INITIAL_CLUSTER="k8s-node02=https://192.168.2.102:2380,k8s-master01=https://192.168.2.100:2380,k8s-node01=https://192.168.2.101:2380"
ETCD_INITIAL_CLUSTER_STATE="existing"
kubeadm alpha phase etcd local --config /root/kubeadm-config.yaml
[root@k8s-node02 ~]# kubeadm alpha phase etcd local --config /root/kubeadm-config.yaml
[etcd] Wrote Static Pod manifest for a local etcd instance to "/etc/kubernetes/manifests/etcd.yaml"
kubeadm alpha phase kubeconfig all --config /root/kubeadm-config.yaml
kubeadm alpha phase controlplane all --config /root/kubeadm-config.yaml
kubeadm alpha phase mark-master --config /root/kubeadm-config.yaml
1.5.3 所有master节点打开keepalived的监控检查，并重启keepalived
[root@k8s-node01 ~]# more /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
# 健康检查
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 2
weight -5
fall 3
rise 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens160
mcast_src_ip 192.168.2.101
virtual_router_id 51
priority 101
advert_int 2
authentication {
auth_type PASS
auth_pass 412f7dc3bfed32194d1600c483e10ad1d
}
virtual_ipaddress {
192.168.2.99
}
track_script {
chk_apiserver
}
}
systemctl restart keepalived
1.6 检查
[root@k8s-master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady master 38m v1.12.3
k8s-node01 NotReady master 10m v1.12.3
k8s-node02 NotReady master 10m v1.12.3
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
coredns-6c66ffc55b-8rlpp 0/1 ContainerCreating 0 39m <none> k8s-node02 <none>
coredns-6c66ffc55b-qdvfg 0/1 ContainerCreating 0 39m <none> k8s-node02 <none>
etcd-k8s-master01 1/1 Running 0 38m 192.168.2.100 k8s-master01 <none>
etcd-k8s-node01 1/1 Running 0 8m32s 192.168.2.101 k8s-node01 <none>
etcd-k8s-node02 1/1 Running 0 7m7s 192.168.2.102 k8s-node02 <none>
kube-apiserver-k8s-master01 1/1 Running 0 38m 192.168.2.100 k8s-master01 <none>
kube-apiserver-k8s-node01 1/1 Running 0 6m28s 192.168.2.101 k8s-node01 <none>
kube-apiserver-k8s-node02 1/1 Running 0 6m23s 192.168.2.102 k8s-node02 <none>
kube-controller-manager-k8s-master01 1/1 Running 1 38m 192.168.2.100 k8s-master01 <none>
kube-controller-manager-k8s-node01 1/1 Running 0 6m28s 192.168.2.101 k8s-node01 <none>
kube-controller-manager-k8s-node02 1/1 Running 0 6m23s 192.168.2.102 k8s-node02 <none>
kube-proxy-62hjm 1/1 Running 0 11m 192.168.2.102 k8s-node02 <none>
kube-proxy-79fbq 1/1 Running 0 11m 192.168.2.101 k8s-node01 <none>
kube-proxy-jsnhl 1/1 Running 0 39m 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-master01 1/1 Running 1 38m 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-node01 1/1 Running 0 6m28s 192.168.2.101 k8s-node01 <none>
kube-scheduler-k8s-node02 1/1 Running 0 6m23s 192.168.2.102 k8s-node02 <none>
1.7 部署网络插件
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
- 在所有master节点上允许hpa通过接口采集数据，修改 /etc/kubernetes/manifests/kube-controller-manager.yaml
- --horizontal-pod-autoscaler-use-rest-clients=false
[root@k8s-master01 ~]# more /etc/kubernetes/manifests/kube-controller-manager.yaml
apiVersion: v1
kind: Pod
metadata:
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ""
creationTimestamp: null
labels:
component: kube-controller-manager
tier: control-plane
name: kube-controller-manager
namespace: kube-system
spec:
containers:
- command:
- kube-controller-manager
- --node-monitor-grace-period=10s
- --pod-eviction-timeout=10s
- --address=127.0.0.1
- --allocate-node-cidrs=true
- --authentication-kubeconfig=/etc/kubernetes/controller-manager.conf
- --authorization-kubeconfig=/etc/kubernetes/controller-manager.conf
- --client-ca-file=/etc/kubernetes/pki/ca.crt
- --cluster-cidr=172.168.0.0/16
- --cluster-signing-cert-file=/etc/kubernetes/pki/ca.crt
- --cluster-signing-key-file=/etc/kubernetes/pki/ca.key
- --controllers=*,bootstrapsigner,tokencleaner
- --kubeconfig=/etc/kubernetes/controller-manager.conf
- --leader-elect=true
- --node-cidr-mask-size=24
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
- --root-ca-file=/etc/kubernetes/pki/ca.crt
- --service-account-private-key-file=/etc/kubernetes/pki/sa.key
- --use-service-account-credentials=true
- --horizontal-pod-autoscaler-use-rest-clients=false
- 在所有master上允许istio的自动注入，修改 /etc/kubernetes/manifests/kube-apiserver.yaml
- --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota
[root@k8s-master01 ~]# more /etc/kubernetes/manifests/kube-apiserver.yaml
apiVersion: v1
kind: Pod
metadata:
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ""
creationTimestamp: null
labels:
component: kube-apiserver
tier: control-plane
name: kube-apiserver
namespace: kube-system
spec:
containers:
- command:
- kube-apiserver
- --authorization-mode=Node,RBAC
- --advertise-address=192.168.2.100
- --allow-privileged=true
- --client-ca-file=/etc/kubernetes/pki/ca.crt
# - --enable-admission-plugins=NodeRestriction
- --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota
- --enable-bootstrap-token-auth=true
- --etcd-cafile=/etc/kubernetes/pki/etcd/ca.crt
- --etcd-certfile=/etc/kubernetes/pki/apiserver-etcd-client.crt
- --etcd-keyfile=/etc/kubernetes/pki/apiserver-etcd-client.key
- --etcd-servers=https://127.0.0.1:2379,https://192.168.2.100:2379
- --insecure-port=0
- --kubelet-client-certificate=/etc/kubernetes/pki/apiserver-kubelet-client.crt
- --kubelet-client-key=/etc/kubernetes/pki/apiserver-kubelet-client.key
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.crt
- --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client.key
- --requestheader-allowed-names=front-proxy-client
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
- --requestheader-extra-headers-prefix=X-Remote-Extra-
- --requestheader-group-headers=X-Remote-Group
- --requestheader-username-headers=X-Remote-User
- --secure-port=6443
- --service-account-key-file=/etc/kubernetes/pki/sa.pub
- --service-cluster-ip-range=10.96.0.0/12
- --tls-cert-file=/etc/kubernetes/pki/apiserver.crt
- --tls-private-key-file=/etc/kubernetes/pki/apiserver.key
systemctl restart kubelet
docker pull quay.io/calico/typha:v0.7.4
docker pull quay.io/calico/node:v3.1.3
docker pull quay.io/calico/cni:v3.1.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.8.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.8.3 gcr.io/google_containers/kubernetes-dashboard-amd64:v1.8.3
# prometheus
docker pull prom/prometheus:v2.3.1
# traefik
docker pull traefik:v1.6.3
- 所有节点下载istio，istio是一个强大的服务网格，可用于灰度发布等强大功能，文档：https://preliminary.istio.io/zh/docs/concepts/what-is-istio/
# istio
docker pull docker.io/jaegertracing/all-in-one:1.5
docker pull docker.io/prom/prometheus:v2.3.1
docker pull docker.io/prom/statsd-exporter:v0.6.0
docker pull quay.io/coreos/hyperkube:v1.7.6_coreos.0
docker pull istio/citadel:1.0.0
docker tag istio/citadel:1.0.0 gcr.io/istio-release/citadel:1.0.0
docker pull istio/galley:1.0.0
docker tag istio/galley:1.0.0 gcr.io/istio-release/galley:1.0.0
docker pull istio/grafana:1.0.0
docker tag istio/grafana:1.0.0 gcr.io/istio-release/grafana:1.0.0
docker pull istio/mixer:1.0.0
docker tag istio/mixer:1.0.0 gcr.io/istio-release/mixer:1.0.0
docker pull istio/pilot:1.0.0
docker tag istio/pilot:1.0.0 gcr.io/istio-release/pilot:1.0.0
docker pull istio/proxy_init:1.0.0
docker tag istio/proxy_init:1.0.0 gcr.io/istio-release/proxy_init:1.0.0
docker pull istio/proxyv2:1.0.0
docker tag istio/proxyv2:1.0.0 gcr.io/istio-release/proxyv2:1.0.0
docker pull istio/servicegraph:1.0.0
docker tag istio/servicegraph:1.0.0 gcr.io/istio-release/servicegraph:1.0.0
docker pull istio/sidecar_injector:1.0.0
docker tag istio/sidecar_injector:1.0.0 gcr.io/istio-release/sidecar_injector:1.0.0
docker pull xiaoqshuo/heapster-amd64:v1.5.4
docker pull xiaoqshuo/heapster-grafana-amd64:v5.0.4
docker pull xiaoqshuo/heapster-influxdb-amd64:v1.5.2
docker pull xiaoqshuo/metrics-server-amd64:v0.2.1
docker tag xiaoqshuo/heapster-amd64:v1.5.4 k8s.gcr.io/heapster-amd64:v1.5.4
docker tag xiaoqshuo/heapster-grafana-amd64:v5.0.4 k8s.gcr.io/heapster-influxdb-amd64:v1.5.2
docker tag xiaoqshuo/heapster-influxdb-amd64:v1.5.2 k8s.gcr.io/heapster-grafana-amd64:v5.0.4
docker tag xiaoqshuo/metrics-server-amd64:v0.2.1 gcr.io/google_containers/metrics-server-amd64:v0.2.1
- 在任意master节点上安装calico，安装calico网络组件后，nodes状态才会恢复正常
kubectl apply -f /opt/k8-ha-install/calico/
[root@k8s-master01 ~]# kubectl apply -f /opt/k8-ha-install/calico/
configmap/calico-config created
service/calico-typha created
deployment.apps/calico-typha created
daemonset.extensions/calico-node created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
serviceaccount/calico-node created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready master 170m v1.12.3
k8s-node01 Ready master 143m v1.12.3
k8s-node02 Ready master 143m v1.12.3
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
calico-node-9cw9r 2/2 Running 0 65s 192.168.2.101 k8s-node01 <none>
calico-node-l6m78 2/2 Running 0 65s 192.168.2.102 k8s-node02 <none>
calico-node-lhqg9 2/2 Running 0 66s 192.168.2.100 k8s-master01 <none>
coredns-6c66ffc55b-8rlpp 1/1 Running 0 170m 172.168.1.3 k8s-node02 <none>
coredns-6c66ffc55b-qdvfg 1/1 Running 0 170m 172.168.1.2 k8s-node02 <none>
etcd-k8s-master01 1/1 Running 0 169m 192.168.2.100 k8s-master01 <none>
etcd-k8s-node01 1/1 Running 0 139m 192.168.2.101 k8s-node01 <none>
etcd-k8s-node02 1/1 Running 0 138m 192.168.2.102 k8s-node02 <none>
kube-apiserver-k8s-master01 1/1 Running 0 3m7s 192.168.2.100 k8s-master01 <none>
kube-apiserver-k8s-node01 1/1 Running 0 4m16s 192.168.2.101 k8s-node01 <none>
kube-apiserver-k8s-node02 1/1 Running 0 4m7s 192.168.2.102 k8s-node02 <none>
kube-controller-manager-k8s-master01 1/1 Running 0 3m49s 192.168.2.100 k8s-master01 <none>
kube-controller-manager-k8s-node01 1/1 Running 0 125m 192.168.2.101 k8s-node01 <none>
kube-controller-manager-k8s-node02 1/1 Running 1 125m 192.168.2.102 k8s-node02 <none>
kube-proxy-62hjm 1/1 Running 0 143m 192.168.2.102 k8s-node02 <none>
kube-proxy-79fbq 1/1 Running 0 143m 192.168.2.101 k8s-node01 <none>
kube-proxy-jsnhl 1/1 Running 0 170m 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-master01 1/1 Running 2 169m 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-node01 1/1 Running 0 137m 192.168.2.101 k8s-node01 <none>
kube-scheduler-k8s-node02 1/1 Running 0 137m 192.168.2.102 k8s-node02 <none>
1.8 确认所有服务开启自启动
systemctl enable kubelet
systemctl enable docker
systemctl disable firewalld
systemctl enable keepalived
1.9 监控及dashboard安装
kubectl taint nodes --all node-role.kubernetes.io/master-
[root@k8s-master01 ~]# kubectl taint nodes --all node-role.kubernetes.io/master-
node/k8s-master01 untainted
node/k8s-node01 untainted
node/k8s-node02 untainted
- 在任意master节点上安装metrics-server，从v1.11.0开始，性能采集不再采用heapster采集pod性能数据，而是使用metrics-server
[root@k8s-master01 ~]# kubectl apply -f /opt/k8-ha-install/metrics-server/
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
serviceaccount/metrics-server created
deployment.extensions/metrics-server created
service/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
...
metrics-server-b6bc985c4-8twwg 1/1 Running 0 18m 172.168.0.3 k8s-master01 <none>
....
- 在任意master节点上安装heapster，从v1.11.0开始，性能采集不再采用heapster采集pod性能数据，而是使用metrics-server，但是dashboard依然使用heapster呈现性能数据
[root@k8s-master01 ~]# kubectl apply -f /opt/k8-ha-install/heapster/
deployment.extensions/monitoring-grafana created
service/monitoring-grafana created
clusterrolebinding.rbac.authorization.k8s.io/heapster created
clusterrole.rbac.authorization.k8s.io/heapster created
serviceaccount/heapster created
deployment.extensions/heapster created
service/heapster created
deployment.extensions/monitoring-influxdb created
service/monitoring-influxdb created
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
...
heapster-56c97d8b49-qp97p 1/1 Running 0 2m57s 172.168.1.4 k8s-node02 <none>
...
monitoring-grafana-6f8dc9f99f-bwrrt 1/1 Running 0 2m57s 172.168.2.2 k8s-node01 <none>
monitoring-influxdb-556dcc774d-45p9t 1/1 Running 0 2m56s 172.168.0.2 k8s-master01 <none>
...
[root@k8s-master01 ~]# kubectl apply -f /opt/k8-ha-install/dashboard/
secret/kubernetes-dashboard-certs created
serviceaccount/kubernetes-dashboard created
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
deployment.apps/kubernetes-dashboard created
service/kubernetes-dashboard created
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
...
kubernetes-dashboard-64d4f8997d-h47f7 1/1 Running 0 2m9s 172.168.1.5 k8s-node02 <none>
...
[root@k8s-master01 ~]# kubectl get pods -n kube-system -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE
calico-node-9cw9r 2/2 Running 0 24m 192.168.2.101 k8s-node01 <none>
calico-node-l6m78 2/2 Running 0 24m 192.168.2.102 k8s-node02 <none>
calico-node-lhqg9 2/2 Running 0 24m 192.168.2.100 k8s-master01 <none>
coredns-6c66ffc55b-8rlpp 1/1 Running 0 3h14m 172.168.1.3 k8s-node02 <none>
coredns-6c66ffc55b-qdvfg 1/1 Running 0 3h14m 172.168.1.2 k8s-node02 <none>
etcd-k8s-master01 1/1 Running 0 3h13m 192.168.2.100 k8s-master01 <none>
etcd-k8s-node01 1/1 Running 0 163m 192.168.2.101 k8s-node01 <none>
etcd-k8s-node02 1/1 Running 0 162m 192.168.2.102 k8s-node02 <none>
heapster-56c97d8b49-qp97p 1/1 Running 0 16m 172.168.1.4 k8s-node02 <none>
kube-apiserver-k8s-master01 1/1 Running 0 26m 192.168.2.100 k8s-master01 <none>
kube-apiserver-k8s-node01 1/1 Running 0 28m 192.168.2.101 k8s-node01 <none>
kube-apiserver-k8s-node02 1/1 Running 0 27m 192.168.2.102 k8s-node02 <none>
kube-controller-manager-k8s-master01 1/1 Running 0 27m 192.168.2.100 k8s-master01 <none>
kube-controller-manager-k8s-node01 1/1 Running 0 149m 192.168.2.101 k8s-node01 <none>
kube-controller-manager-k8s-node02 1/1 Running 1 149m 192.168.2.102 k8s-node02 <none>
kube-proxy-62hjm 1/1 Running 0 167m 192.168.2.102 k8s-node02 <none>
kube-proxy-79fbq 1/1 Running 0 167m 192.168.2.101 k8s-node01 <none>
kube-proxy-jsnhl 1/1 Running 0 3h14m 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-master01 1/1 Running 2 3h13m 192.168.2.100 k8s-master01 <none>
kube-scheduler-k8s-node01 1/1 Running 0 161m 192.168.2.101 k8s-node01 <none>
kube-scheduler-k8s-node02 1/1 Running 0 161m 192.168.2.102 k8s-node02 <none>
kubernetes-dashboard-64d4f8997d-h47f7 1/1 Running 0 16m 172.168.1.5 k8s-node02 <none>
metrics-server-b6bc985c4-8twwg 1/1 Running 0 18m 172.168.0.3 k8s-master01 <none>
monitoring-grafana-6f8dc9f99f-bwrrt 1/1 Running 0 16m 172.168.2.2 k8s-node01 <none>
monitoring-influxdb-556dcc774d-45p9t 1/1 Running 0 16m 172.168.0.2 k8s-master01 <none>
1.10 dashboard配置
- 浏览器打开： https://k8s-master-lb:30000
- 注：推荐使用 火狐浏览器
- 如果使用 Chrome 浏览器，需要在启动程序 --> 属性 --> 目标选项里，追加
--test-type --ignore-certificate-errors
[root@k8s-master01 ~]# kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
Name: admin-user-token-dp28v
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: admin-user
kubernetes.io/service-account.uid: d07db348-f867-11e8-bf75-000c295582bd
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1025 bytes
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLWRwMjh2Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiJkMDdkYjM0OC1mODY3LTExZTgtYmY3NS0wMDBjMjk1NTgyYmQiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.pynqnVbZyS5YbZv6LRFePdnaZWVR6c1EIyi31eycLgqP9xfCWOs9wfdLLYkjS2yAsUg2ry7mDC1PVKrxke2pzU3l9agUpo34j_cF8mJ8rL0kfL6AiuTIcTy7FmgFOzY44G76qG-jJO2B31ZLwjP96Sxh8p7pptd5V-lxxE7mZNhFcTYIJpfqY7SycRu8zCmeZXgAjYBzJMlq8lOTaq3k_0orsHvujbYy81_GOhA_ASieKioNKsgl9U-41P5DadfaMKacQkxNllvGNIFJti1yMPtXCO6me8EhcqFP2o2ilq7bJjZYrWSE4Emc_ACBK9TtiRdMs6HTLe3xXxtCVFTZEg
1.11 node节点加入集群
[root@k8s-node01 ~]# kubeadm reset
[reset] WARNING: changes made to this host by 'kubeadm init' or 'kubeadm join' will be reverted.
[reset] are you sure you want to proceed? [y/N]: y
[preflight] running pre-flight checks
[reset] stopping the kubelet service
[reset] unmounting mounted directories in "/var/lib/kubelet"
[reset] removing kubernetes-managed containers
[reset] cleaning up running containers using crictl with socket /var/run/dockershim.sock
[reset] failed to list running pods using crictl: exit status 1. Trying to use docker instead[reset] no etcd manifest found in "/etc/kubernetes/manifests/etcd.yaml". Assuming external etcd
[reset] deleting contents of stateful directories: [/var/lib/kubelet /etc/cni/net.d /var/lib/dockershim /var/run/kubernetes]
[reset] deleting contents of config directories: [/etc/kubernetes/manifests /etc/kubernetes/pki]
[reset] deleting files: [/etc/kubernetes/admin.conf /etc/kubernetes/kubelet.conf /etc/kubernetes/bootstrap-kubelet.conf /etc/kubernetes/controller-manager.conf /etc/kubernetes/scheduler.conf]
- master节点的token 24小时过期后，可以通过命令产生新的token：
kubeadm token create
kubeadm token list
- master节点上运行命令，可查询discovery-token-ca-cert-hash值：
openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | \
openssl dgst -sha256 -hex | sed 's/^.* //'
[root@k8s-node01 ~]# kubeadm join 192.168.2.99:16443 --token 1s1g4k.rsnrw7t1njkjz6zk --discovery-token-ca-cert-hash sha256:357d5c7da9a3dc6edd8edda2dded629913fd601151a571fb020ae5f8cbf19224
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready master 21h v1.12.3
k8s-node01 Ready master 20h v1.12.3
k8s-node02 Ready master 20h v1.12.3
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 Ready master 21h v1.12.3
k8s-node01 Ready master 20h v1.12.3
k8s-node02 Ready master 20h v1.12.3
- 参考：
- https://www.cnblogs.com/dukuan/p/9856269.html
- https://kubernetes.io/docs/setup/independent/high-availability/
- https://github.com/cookeem/kubeadm-ha/blob/master/README_CN.md
- https://blog.csdn.net/ygqygq2/article/details/81333400
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