kubenetes 平滑升级

k8s集群平滑升级

一个一个升级
选择运行pod少的node先升级
删除node

kubectl delete node rstx-203

将node踢出集群

tail -20 /etc/nginx/nginx.conf

stream {
    upstream kube-apiserver {
#        server 192.168.1.203:6443     max_fails=3 fail_timeout=30s;
        server 192.168.1.204:6443     max_fails=3 fail_timeout=30s;
    }
    server {
        listen 7443;
        proxy_connect_timeout 2s;
        proxy_timeout 900s;
        proxy_pass kube-apiserver;
    }
}

  

cat /etc/nginx/conf.d/rongbiz.cn.conf 
upstream default_backend_traefik {
#    server 192.168.1.203:81    max_fails=3 fail_timeout=10s;
    server 192.168.1.204:81    max_fails=3 fail_timeout=10s;
	server 192.168.1.205:81    max_fails=3 fail_timeout=10s;
	server 192.168.1.240:81    max_fails=3 fail_timeout=10s;
	server 192.168.1.241:81    max_fails=3 fail_timeout=10s;
	server 192.168.4.5:81    max_fails=3 fail_timeout=10s;
}
server {
    server_name *.rongbiz.cn;
  
    location / {
        proxy_pass http://default_backend_traefik;
        proxy_set_header Host       $http_host;
        proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
    }
}

升级包

tar xf kubernetes-server-linux-amd64-v1.15.4.tar.gz -C /opt/tmp/

mv kubernetes /opt/kubernetes-v1.15.4
cd /opt/kubernetes-v1.15.4/server/bin
mkdir conf
mkdir cert

cd cert/
cp /opt/kubernetes/server/bin/cert/* .

cd ../conf/
cp /opt/kubernetes/server/bin/conf/* .

cd /opt/kubernetes-v1.15.4/server/bin
cp /opt/kubernetes/server/bin/*.sh .

删除软链接，创建新版本的软链接

ln -s /opt/kubernetes-v1.15.4 /opt/kubernetes

重启所有的k8s相关程序

supervisorctl start etcd-server-203
supervisorctl start kube-apiserver-203
supervisorctl start kube-controller-manager-203
supervisorctl start kube-scheduler-203
supervisorctl start kube-kubelet-203
supervisorctl start kube-proxy-203
supervisorctl start flanneld-203

kubectl label node rstx-203.host.com node-role.kubernetes.io/master=
kubectl label node rstx-203.host.com node-role.kubernetes.io/node=

node节点宕机处理

删除node
将node踢出集群
修复宕机节点