kubernets 集群 二进制安装
之前尝试了使用kubeadm工具来安装k8s集群,非常简单,傻瓜也会。那么,其中肯定有诈。所以就花了些时间使用二进制文件方式来安装k8s集群。说白了 ,二进制文件就是可直接执行的底层代码,这样的安装方式无非就是自己手动把kubeadm工具所做的事情做了。废话够多了,开始下一步吧。组织架构master:192.168.10.21 控制节点 安装etcd,kube-apiserv...
之前尝试了使用kubeadm工具来安装k8s集群,非常简单,傻瓜也会。那么,其中肯定有诈。所以就花了些时间使用二进制文件方式来安装k8s集群。说白了 ,二进制文件就是可直接执行的底层代码,这样的安装方式无非就是自己手动把kubeadm工具所做的事情做了。废话够多了,开始下一步吧。
组织架构
master:192.168.10.21 控制节点 安装etcd,kube-apiserver,kube-controller-manager,kube-scheduler
node1: 192.168.10.22 计算节点1 安装kube-proxy,kubelet
node2: 192.168.10.23 计算节点2 安装kube-proxy,kubelet
无论是master或者node,都需要提前安装好docker
master 节点的安装
一.安装etcd
1.下载etcd二进制包
wget https://github.com/etcd-io/etcd/releases/download/v3.3.9/etcd-v3.3.9-linux-amd64.tar.gz
2.解压etcd
tar -zxvf etcd-v3.3.9-linux-amd64.tar.gz & cd etcd-v3.3.9-linux-amd64
3.将二进制包etcd,etcdctl复制到/usr/bin目录
cp etcd etcdctl /usr/bin
4.设置systemd服务文件/usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
[Service]
Type=simple
WorkingDirectory=/var/lib/etcd/ #etcd数据保存的目录
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
[Install]
WantedBy=multi-user.target
5.增加一下etcd的存放目录,默认不存在
mkdir /var/lib/etcd
6.配置完成后,通过systemctl start 命令启动etcd服务
systemctl daemon-reload
systemctl enable etcd.service
systemctl start etcd.service
通过执行 etcdctl cluster-health 验证etcd 是否正确启动
etcdctl cluster-health
二.安装kube-apiserver服务
1.首先到kubernetes官网找到相应的二进制包
cd /usr/local/src/
wget https://dl.k8s.io/v1.11.0/kubernetes-server-linux-amd64.tar.gz
2.解压kubernetes-server-linux-amd64.tar.gz
tar -zxvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin & ls
3.将kube-apiserver,kube-controller-manager,kube-scheduler复制到/usr/bin
cp kube-apiserver kube-controller-manager kube-scheduler /usr/bin
4.设置systemd服务文件/usr/lib/systemd/system/kube-apiserver.service
[root@master system]# vim kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=etcd.service
Wants=etcd.service
[Service]
EnvironmentFile=/etc/kubernetes/apiserver
ExecStart=/usr/bin/kube-apiserver $KUBE_API_ARGS
Restart=on-failure
Type=notify
[Install]
WantedBy=multi-user.target
5.编辑/etc/kubernetes/apiserver
KUBE_API_ARGS="--storage-backend=etcd3 --etcd-servers=http://127.0.0.1:2379 --insecure-bind-address=0.0.0.0 --insecure-port=8080 --service-cluster-ip-range=10.10.10.0/24 --service-node-port-range=1-65535 --admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,DefaultStorageClass,ResourceQuota --logtostderr=true --log-dir=/var/log/kubernetes --v=2"
三.安装kube-controller-manager
1.设置systemd服务文件/usr/lib/systemd/system/kube-controller-manager.service服务
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=kube-apiserver.service
Requires=kube-apiserver.service
[Service]
EnvironmentFile=-/etc/kubernetes/controller-manager
ExecStart=/usr/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_ARGS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
2.编辑配置文件/etc/kubernetes/controller-manager
KUBE_CONTROLLER_MANAGER_ARGS="--master=http://192.168.10.21:8080 --logtostderr=true --log-dir=/var/log/kubernetes --v=2"
四.安装kube-scheduler
1.设置systemd服务文件/usr/lib/systemd/system/kube-scheduler.service服务
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=kube-apiserver.service
Requires=kube-apiserver.service
[Service]
EnvironmentFile=-/etc/kubernetes/scheduler
ExecStart=/usr/bin/kube-scheduler $KUBE_SCHEDULER_ARGS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
2.编辑配置文件/etc/kubernetes/scheduler
KUBE_SCHEDULER_ARGS="--master=http://192.168.10.21:8080 --logtostderr=true --log-dir=/var/log/kubernetes --v=2"
五.启动master各个服务
systemctl daemon-reload
systemctl enable kube-apiserver.service
systemctl start kube-apiserver.service
systemctl enable kube-controller-manager.service
systemctl start kube-controller-manager.service
systemctl enable kube-scheduler
systemctl start kube-scheduler
node节点安装
1.下载kubernetes二进制包,将里面的kubectl,kube-proxy复制到/usr/bin
cp /usr/local/src/kubernetes/server/bin/kubelet /usr/bin
cp /usr/local/src/kubernetes/server/bin/kube-proxy /usr/bin
2.配置/usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service
Requires=docker.service
[Service]
WorkingDirectory=/var/lib/kubelet
EnvironmentFile=-/etc/kubernetes/kubelet
ExecStart=/usr/bin/kubelet $KUBELET_ARGS
Restart=on-failure
KillMode=process
[Install]
WantedBy=multi-user.target
3.添加参数文件/etc/kubernetes/kubelet
KUBELET_ARGS="--address=192.168.10.22 --port=10250 --cgroup-driver=systemd --hostname-override=192.168.10.22 --allow-privileged=false --kubeconfig=/etc/kubernetes/kubelet.kubeconfig --cluster-dns=10.10.10.2 --cluster-domain=cluster.local --fail-swap-on=false --logtostderr=true --log-dir=/var/log/kubernetes --v=4"
4.设置kubeconfig
cat /etc/kubernetes/kubelet.kubeconfig
apiVersion: v1
kind: Config
clusters:
- cluster:
server: http://192.168.10.21:8080
name: local
contexts:
- context:
cluster: local
name: local
current-context: local
5.kube-proxy服务/usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Kube-proxy Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.service
Requires=network.service
[Service]
EnvironmentFile=/etc/kubernetes/proxy
ExecStart=/usr/bin/kube-proxy $KUBE_PROXY_ARGS
Restart=on-failure
LimitNOFILE=65536
KillMode=process
[Install]
WantedBy=multi-user.target
6.配置文件/etc/kubernetes/proxy
KUBE_PROXY_ARGS="--master=http://192.168.10.21:8080 --hostname-override=192.168.10.22 --logtostderr=true --log-dir=/var/log/kubernetes --v=4"
7.通过systemctl start 启动kubelet和kube-proxy服务
systemctl daemon-reload
systemctl enable kubelet.service
systemctl start kubelet.service
systemctl enable kube-proxy
systemctl start kube-proxy
8. 在master上测试node是否成功安装
kubectl get nodes
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