kubeasz

本文最后更新于：2023年12月5日 晚上

https://github.com/easzlab/kubeasz

https://github.com/easzlab/kubeasz/blob/master/docs/setup/00-planning_and_overall_intro.md

角色 ip 主机名 备注
master1 10.0.1.1/21 k8s-master1.ljk.cn 同时部署 ansible
master2 10.0.1.2/21 k8s-master2.ljk.cn
node1 10.0.1.3/21 k8s-node1.ljk.cn
node2 10.0.1.4/21 k8s-node2.ljk.cn
etcd1 10.0.2.1/21 k8s-etcd1.ljk.cn
etcd2 10.0.2.2/21 k8s-etcd2.ljk.cn
etcd3 10.0.2.3/21 k8s-etcd3.ljk.cn
HAProxy1 + keepalived
给 master 做负载均衡		 10.0.2.1/21
vip：10.0.2.188:8443		 和 etcd1 混用
HAProxy2 + keepalived
给 master 做负载均衡		 10.0.2.2/2
vip：10.0.2.188:8443		 和 etcd2 混用
harbor 10.0.2.3/21 和 etcd3 混用

架构图：

准备

校准时区和同步时间

  • 所有服务器，校准时区

    timedatectl set-timezone Asia/Shanghai

  • 确保各节点时区设置一致、时间同步。 如果你的环境没有提供 NTP 时间同步，推荐集成安装 chrony

    [root@k8s-master1 ~]$apt install -y chrony
[root@k8s-master1 ~]$sed -n '/^#/!p' /etc/chrony/chrony.conf
server ntp.aliyun.com iburst
server time1.cloud.tencent.com iburst
keyfile /etc/chrony/chrony.keys
driftfile /var/lib/chrony/chrony.drift
logdir /var/log/chrony
maxupdateskew 100.0
rtcsync
makestep 1 3
allow 10.0.0.0/16
allow 10.0.1.0/16
allow 10.0.2.0/16
allow 10.0.3.0/16
allow 10.0.4.0/16
allow 10.0.5.0/16
allow 10.0.6.0/16
allow 10.0.7.0/16
local stratum 10
[root@k8s-master1 ~]$systemctl restart chronyd.service

# 其他节点
$apt install -y chrony
$vim /etc/chrony/chrony.conf
...
server 10.0.1.1 iburst # 只修改此行
...
$systemctl restart chronyd.service

python

kubeasz 基于 ansible，而 ansible 基于 python 的，所以所有服务器都需要安装 python 环境

apt update && apt install python3 –y

ansible

在 master1 上安装 ansible

[root@k8s-master1 ~]$apt-get install git python3-pip -y
# 优化pip
[root@k8s-master1 ~]$vim ~/.pip/pip.conf  # 没有就创建
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/

[install]
trusted-host=mirrors.aliyun.com

[root@k8s-master1 ~]$pip3 install ansible  # 这一步时间很长，建议更改为阿里的pip源

设置 ssh 免密

function ssh_push_key() {
    ips=(
        10.0.1.2
        10.0.1.3
        10.0.1.4
        10.0.2.1
        10.0.2.2
        10.0.2.3
    )
    [ "$1" ] && ips=($@)
    apt install -y sshpass
    [ -f ~/.ssh/id_rsa ] || ssh-keygen -t rsa -f ~/.ssh/id_rsa -P '' >/dev/null 2>&1
    export SSHPASS=ljkk
    for ip in ${ips[@]}; do
        (
            timeout 5 ssh $ip echo "$ip: SSH has passwordless access!"
            if [ $? != 0 ]; then
                sshpass -e ssh-copy-id -o StrictHostKeyChecking=no root@$ip >/dev/null 2>&1
                timeout 5 ssh $ip echo "$ip: SSH has passwordless access!" || echo "$ip: SSH has no passwordless access!"
            fi
        ) &
    done
    wait
}
ssh_push_key

keepalived

10.0.2.1/21 和 10.0.2.2/21 均安装 keepalived

# 安装
$apt install keepalived -y
$vim /etc/keepalived/keepalived.conf
global_defs {
    router_id keepalived1
    vrrp_skip_check_adv_addr
    vrrp_garp_interval 0
    vrrp_gna_interval 0
    vrrp_mcast_group4 224.0.0.18
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 1  # 另一个keepalived设置为2
    priority 100   # 另一个keepalived设置为120
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        10.0.2.188 dev eth0 label eth0:0
    }
}
$systemctl restart keepalived.service

haproxy

10.0.2.1/21 和 10.0.2.2/21 均安装 haproxy

# 编译安装lua，过程略...
# 编译安装haproxy
$wget http://www.haproxy.org/download/2.2/src/haproxy-2.2.6.tar.gz
$apt install make gcc build-essential libssl-dev zlib1g-dev libpcre3 libpcre3-dev libsystemd-dev libreadline-dev -y
$useradd -r -s /sbin/nologin -d /var/lib/haproxy haproxy
$mkdir /usr/local/haproxy
$tar zxvf haproxy-2.2.6.tar.gz
$cd haproxy-2.2.6/
$make ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_LUA=1 LUA_INC=/usr/local/lua/src/ LUA_LIB=/usr/local/lua/src/
$make install PREFIX=/usr/local/haproxy
$vim /etc/profile # export PATH=/usr/local/haproxy/sbin:$PATH
$. /etc/profile
$haproxy -v
$haproxy -V
$haproxy -vv

# 配置文件
$mkdir /var/lib/haproxy
$mkdir /etc/haproxy
$vim /etc/haproxy/haproxy.cfg
global
    chroot /usr/local/haproxy
    stats socket /var/lib/haproxy/haproxy.sock mode 600 level admin
    user haproxy
    group haproxy
    daemon
    nbproc 1
    maxconn 100000
    pidfile /var/lib/haproxy/haproxy.pid

defaults
    option redispatch
    option abortonclose
    option http-keep-alive
    option forwardfor
    maxconn 100000
    mode http
    timeout connect 120s
    timeout server 120s
    timeout client 120s
    timeout     check 5s

listen stats
    stats enable
    mode http
    bind 0.0.0.0:9999
    log global
    stats uri /haproxy-status
    stats auth admin:123456

listen k8s-api-8443
    bind 10.0.2.188:8443  # 注意，要和hosts的[ex-lb]对应起来
    mode tcp
    server master1 10.0.1.1:6443 check inter 2000 fall 3 rise 5 # 6443端口是默认的，不能改
    server master2 10.0.1.2:6443 check inter 2000 fall 3 rise 5

# 启动文件
$mkdir /etc/haproxy/conf.d/
$vim /lib/systemd/system/haproxy.service
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target

[Service]
ExecStartPre=/usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg -f /etc/haproxy/conf.d/ -c -q
ExecStart=/usr/local/haproxy/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -f /etc/haproxy/conf.d/ -p /var/lib/haproxy/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID

[Install]
WantedBy=multi-user.target

$systemctl start haproxy.service

下载项目源码

$export release=2.2.4
$curl -C- -fLO --retry 3 https://github.com/easzlab/kubeasz/releases/download/${release}/easzup
$chmod +x ./easzup
# 使用工具脚本下载
$./easzup -D

配置集群参数

cd /etc/ansible
cp example/hosts.multi-node hosts
# 'etcd' cluster should have odd member(s) (1,3,5,...)
# variable 'NODE_NAME' is the distinct name of a member in 'etcd' cluster
[etcd]
10.0.2.1 NODE_NAME=etcd1
10.0.2.2 NODE_NAME=etcd2
10.0.2.3 NODE_NAME=etcd3

# master node(s)
[kube-master]
10.0.1.1
10.0.1.2

# work node(s)
[kube-node]
10.0.1.3
#10.0.1.4

# [optional] harbor server, a private docker registry
# 'NEW_INSTALL': 'yes' to install a harbor server; 'no' to integrate with existed one
# 'SELF_SIGNED_CERT': 'no' you need put files of certificates named harbor.pem and harbor-key.pem in directory 'down'
[harbor]
#192.168.1.8 HARBOR_DOMAIN="harbor.yourdomain.com" NEW_INSTALL=no SELF_SIGNED_CERT=yes

# [optional] loadbalance for accessing k8s from outside
[ex-lb]
10.0.2.1 LB_ROLE=backup EX_APISERVER_VIP=10.0.2.188 EX_APISERVER_PORT=8443
10.0.2.2 LB_ROLE=master EX_APISERVER_VIP=10.0.2.188 EX_APISERVER_PORT=8443

# [optional] ntp server for the cluster
[chrony]
#192.168.1.1

[all:vars]
# --------- Main Variables ---------------
# Cluster container-runtime supported: docker, containerd
CONTAINER_RUNTIME="docker"

# Network plugins supported: calico, flannel, kube-router, cilium, kube-ovn
CLUSTER_NETWORK="calico"

# Service proxy mode of kube-proxy: 'iptables' or 'ipvs'
PROXY_MODE="ipvs"

# K8S Service CIDR, not overlap with node(host) networking
SERVICE_CIDR="192.168.0.0/16"

# Cluster CIDR (Pod CIDR), not overlap with node(host) networking
CLUSTER_CIDR="10.10.0.0/16"

# NodePort Range
NODE_PORT_RANGE="30000-60000"

# Cluster DNS Domain
CLUSTER_DNS_DOMAIN="ljk.local."

# -------- Additional Variables (don't change the default value right now) ---
# Binaries Directory
bin_dir="/usr/local/bin"

# CA and other components cert/key Directory
ca_dir="/etc/kubernetes/ssl"

# Deploy Directory (kubeasz workspace)
base_dir="/etc/ansible"

验证配置是否成功：

$ansible all -m ping

安装

配置 harbor

10.0.2.3，详细步骤参考：docker 仓库管理

因为笔记本性能问题，harbor 和 etcd 复用一个节点，所以 harbor 的 hostname 配置为 ip，如果 harbor 单独使用一台服务器，应该配置为 hostname

00-规划集群和配置介绍

https://github.com/easzlab/kubeasz/blob/master/docs/setup/00-planning_and_overall_intro.md

01-创建证书和安装准备

https://github.com/easzlab/kubeasz/blob/master/docs/setup/01-CA_and_prerequisite.md

[root@k8s-master1 ansible]$pwd
/etc/ansible
[root@k8s-master1 ansible]$ansible-playbook ./01.prepare.yml

02-安装 etcd 集群

https://github.com/easzlab/kubeasz/blob/master/docs/setup/02-install_etcd.md

[root@k8s-master1 ansible]$ansible-playbook ./02.etcd.yml

03-安装 docker 服务

https://github.com/easzlab/kubeasz/blob/master/docs/setup/03-install_docker.md

[root@k8s-master1 ansible]$ansible-playbook 03.docker.yml

04-安装 master 节点

https://github.com/easzlab/kubeasz/blob/master/docs/setup/04-install_kube_master.md

[root@k8s-master1 ansible]$ansible-playbook 04.kube-master.yml
# 报错：目标主机没有/opt/kube目录
TASK [kube-master : 配置admin用户rbac权限] ****************************************************************************************
fatal: [10.0.1.2]: FAILED! => {"changed": false, "checksum": "95ce2ef4052ea55b6326ce0fe9f6da49319874c7", "msg": "Destination directory /opt/kube does not exist"}
changed: [10.0.1.1]

# 解决：去目标主机手动创建/opt/kube目录
[root@k8s-master2 ~]$mkdir /opt/kube
# 重新执行ansible-playbook
[root@k8s-master1 ansible]$ansible-playbook 04.kube-master.yml

05-安装 node 节点

https://github.com/easzlab/kubeasz/blob/master/docs/setup/05-install_kube_node.md

[root@k8s-master1 ansible]$ansible-playbook 05.kube-node.yml

06-安装集群网络

https://github.com/easzlab/kubeasz/blob/master/docs/setup/06-install_network_plugin.md

公有云推荐使用 flannel，自建 IDC 推荐使用 calico，如果选择 calico，一定要关闭 IPIP

[root@k8s-master1 ansible]$vim roles/calico/defaults/main.yml
CALICO_IPV4POOL_IPIP: "off"   # 将always修改为off，关闭IPIP
[root@k8s-master1 ansible]$ansible-playbook 06.network.yml

07-安装集群插件

https://github.com/easzlab/kubeasz/blob/master/docs/setup/07-install_cluster_addon.md

安装 dashboard

安装部署：

[root@k8s-master1 ansible]$cd manifests/dashboard/
[root@k8s-master1 dashboard]$pwd
/etc/ansible/manifests/dashboard
# 部署dashboard 主yaml配置文件
[root@k8s-master1 dashboard]$kubectl apply -f ./kubernetes-dashboard.yaml
# 创建可读可写 admin Service Account
[root@k8s-master1 dashboard]$kubectl apply -f ./admin-user-sa-rbac.yaml
# 创建只读 read Service Account
[root@k8s-master1 dashboard]$kubectl apply -f ./read-user-sa-rbac.yaml

验证：

# 查看pod 运行状态
[root@k8s-master1 dashboard]$kubectl get pod -n kube-system | grep dashboard
dashboard-metrics-scraper-79c5968bdc-cqg8b   1/1     Running   0          60m
kubernetes-dashboard-c4c6566d6-crqfc         1/1     Running   0          60m
# 查看dashboard service
[root@k8s-master1 dashboard]$kubectl get service -n kube-system|grep dashboard
dashboard-metrics-scraper ClusterIP 192.168.233.194  <none>  8000/TCP       60m
kubernetes-dashboard      NodePort  192.168.249.138  <none>  443:44420/TCP  60m # 44420
# 查看集群服务
$kubectl cluster-info|grep dashboard
# 查看pod 运行日志
$kubectl logs kubernetes-dashboard-c4c6566d6-crqfc -n kube-system

访问：

登录：

  • token：令牌

    # 查看用户 admin-user 的 token
$kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')

# 查看用户 read-user 的 token
$kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep read-user | awk '{print $1}')

  • kubeconfig：配置文件

    将 token 追加到 /root/.kube/config 文件中，然后将此文件作为登录的凭证

测试网络

# 安装几个测试pod
# 注意node上的/etc/docker/daemon.json 要配置"insecure-registries": ["10.0.2.3"]
kubectl run net-test1 --image=10.0.2.3/baseimages/alpine:3.13 sleep 360000
kubectl run net-test2 --image=10.0.2.3/baseimages/alpine:3.13 sleep 360000
kubectl run net-test3 --image=10.0.2.3/baseimages/alpine:3.13 sleep 360000
# 查看pod，确保跑在不同的node上，这样才能测试网络
$kubectl get pod -o wide
NAME     READY    STATUS    RESTARTS AGE   IP     NODE  NOMINATED NODE  READINESS GATES
net-test1   1/1     Running   0    7m11s   10.10.210.4   10.0.1.4   <none>    <none>
net-test2   1/1     Running   0    2m27s   10.10.210.5   10.0.1.4   <none>    <none>
net-test3   1/1     Running   0    2m6s    10.10.246.66  10.0.1.3   <none>     <none>
# 测试：进入pod，ping其他node的pod的ip，确保能ping通

安装 CoreDNS

# 进入到pod中，无法ping通域名，这时因为没有配置dns
$ping kubernetes.default.svc.ljk.local
ping: bad address 'kubernetes.default.svc.ljk.local'

自行安装

coredns 官方 github 提供的安装脚本，依赖 kube-dns，所以我们使用 kubernetes 官方提供的 yaml 进行安装

去 kubernetes 的官方 github 仓库，下载二进制文件

打开后，往下拉，下载 client、node、server 三个源码包，注意要下载 amd64 版本，不要下载错了

https://dl.k8s.io/v1.20.2/kubernetes.tar.gz
https://dl.k8s.io/v1.20.2/kubernetes-client-linux-amd64.tar.gz
https://dl.k8s.io/v1.20.2/kubernetes-node-linux-amd64.tar.gz
https://dl.k8s.io/v1.20.2/kubernetes-server-linux-amd64.tar.gz
[root@k8s-master1 src]$tar zxf kubernetes.tar.gz
[root@k8s-master1 src]$tar zxf kubernetes-client-linux-amd64.tar.gz
[root@k8s-master1 src]$tar zxf kubernetes-node-linux-amd64.tar.gz
[root@k8s-master1 src]$tar zxf kubernetes-server-linux-amd64.tar.gz
[root@k8s-master1 src]$cd kubernetes/
[root@k8s-master1 kubernetes]$ll
total 33672
drwxr-xr-x 10 root root     4096 Jan 13 21:44 ./
drwxr-xr-x  3 root root     4096 Jan 29 19:38 ../
drwxr-xr-x  2 root root     4096 Jan 13 21:44 addons/
drwxr-xr-x  3 root root     4096 Jan 13 21:40 client/
drwxr-xr-x  9 root root     4096 Jan 13 21:46 cluster/
drwxr-xr-x  2 root root     4096 Jan 13 21:46 docs/
drwxr-xr-x  3 root root     4096 Jan 13 21:46 hack/
-rw-r--r--  1 root root 34426961 Jan 13 21:44 kubernetes-src.tar.gz
drwxr-xr-x  3 root root     4096 Jan 13 21:44 LICENSES/
drwxr-xr-x  3 root root     4096 Jan 13 21:41 node/
-rw-r--r--  1 root root     3386 Jan 13 21:46 README.md
drwxr-xr-x  3 root root     4096 Jan 13 21:41 server/
-rw-r--r--  1 root root        8 Jan 13 21:46 version
[root@k8s-master1 kubernetes]$ll server/bin/ # 这些都是go写的二进制程序，可以直接执行的
...
[root@k8s-master1 kubernetes]$cd ./cluster/addons/dns/coredns/
[root@k8s-master1 coredns]$ll
total 44
drwxr-xr-x 2 root root 4096 Jan 29 21:39 ./
drwxr-xr-x 5 root root 4096 Jan 13 21:46 ../
-rw-r--r-- 1 root root 4957 Jan 13 21:46 coredns.yaml.base
-rw-r--r-- 1 root root 5007 Jan 13 21:46 coredns.yaml.in # 基于coredns.yaml.base
-rw-r--r-- 1 root root 5009 Jan 13 21:46 coredns.yaml.sed # 基于coredns.yaml.base
-rw-r--r-- 1 root root 1075 Jan 13 21:46 Makefile
-rw-r--r-- 1 root root  344 Jan 13 21:46 transforms2salt.sed
-rw-r--r-- 1 root root  287 Jan 13 21:46 transforms2sed.sed
[root@k8s-master1 coredns]$mkdir -p /etc/ansible/manifests/dns/coredns # 规划一下目录
[root@k8s-master1 coredns]$cp coredns.yaml.base /etc/ansible/manifests/dns/coredns/coredns.yaml
[root@k8s-master1 coredns]$cd /etc/ansible/manifests/dns/coredns/
[root@k8s-master1 coredns]$ls
coredns.yaml
[root@k8s-master1 coredns]$vim coredns.yaml
# 修改以下几行
image: 10.0.2.3/baseimages/coredns:1.7.0  # 将镜像换为本地harbor地址
resources:
  limits:
    memory: 512Mi  # 分配内存，生产中要给的大一些
kubernetes ljk.local in-addr.arpa ip6.arpa { # 设置域名 ljk.local
  pods insecure
  fallthrough in-addr.arpa ip6.arpa
  ttl 30
}
clusterIP: 192.168.0.2  # 设置dns服务器，这个可以进入pod查看/etc/resolv.conf的nameserver
[root@k8s-master1 coredns]$kubectl apply -f coredns.yaml
[root@k8s-master1 coredns]$kubectl get pod -n kube-system  | grep coredns
coredns-7589f7f68b-jp5kz          1/1     Running   0       39m
# 查看 server ip
$kubectl get service -o wide -A
NAMESPACE     NAME                        TYPE        CLUSTER-IP        EXTERNAL-IP   PORT(S)                  AGE     SELECTOR
default       kubernetes                  ClusterIP   192.168.0.1       <none>        443/TCP                  29h     <none>
kube-system   dashboard-metrics-scraper   ClusterIP   192.168.233.194   <none>        8000/TCP                 6h27m   k8s-app=dashboard-metrics-scraper
kube-system   kube-dns                    ClusterIP   192.168.0.2       <none>        53/UDP,53/TCP,9153/TCP   47m     k8s-app=kube-dns
kube-system   kubernetes-dashboard        NodePort    192.168.249.138   <none>        443:44420/TCP            6h27m   k8s-app=kubernetes-dashboard

通过 dashboard 进入 pod，测试一下：

# 服务名称.命名空间.svc.ljk.local
/ # nslookup  kubernetes.default.svc.ljk.local
Server:         192.168.0.2
Address:        192.168.0.2#53

Name:   kubernetes.default.svc.ljk.local
Address: 192.168.0.1      # 测试成功

/ # nslookup  dashboard-metrics-scraper.kube-system.svc.ljk.local
Server:         192.168.0.2
Address:        192.168.0.2#53

Name:   dashboard-metrics-scraper.kube-system.svc.ljk.local
Address: 192.168.233.194

kubeasz 安装

[root@k8s-master ansible]$vim roles/cluster-addon/defaults/main.yml
# 关闭其他组件的自动安装，只安装coredns
metricsserver_install: "no"
dashboard_install: "no"
ingress_install: "no"

[root@k8s-master ansible]$ansible-playbook ./07.cluster-addon.yml
...

# 测试，随便进入一个pod
/ # nslookup kubernetes.default.svc.ljk.local
Server:         192.168.0.2
Address:        192.168.0.2:53

Name:   kubernetes.default.svc.ljk.local
Address: 192.168.0.1

关于负载均衡

kubeasz 的逻辑是在每个 node 上安装一个 haproxy，如果 master 的数量超过 1 个，node 和 master 的通信就走 haproxy

[root@k8s-node1 kubernetes]$cat ~/.kube/config | grep server
    server: https://127.0.0.1:6443
[root@k8s-node1 kubernetes]$cat /etc/kubernetes/kube-proxy.kubeconfig | grep server
    server: https://127.0.0.1:6443
[root@k8s-node1 kubernetes]$cat /etc/kubernetes/kubelet.kubeconfig | grep server
    server: https://127.0.0.1:6443

可是这样无法避免 haproxy 的单点失败问题，而且外部访问 master 的时候还得走 vip，所以不如直接只搭建一套 keeplived + haproxy，然后不管 master 还是 node，所有和 apiserver 的通信都走 vip，kubeasz 提供了搭建 keeplived + haproxy 的 playbook，在 01.prepare.yml 中打开注释即可，当然也可以自己搭建

使用

添加节点

非常简单

添加 master

https://github.com/easzlab/kubeasz/blob/master/docs/op/op-master.md

easzctl add-master $ip

添加 node

https://github.com/easzlab/kubeasz/blob/master/docs/op/op-node.md

easzctl add-node $ip

集群升级

小版本升级

下载最新版本的 kubernetes，全部解压后，在 kubernetes/server/bin 目录下，都是编译好的二进制程序

kubernetes-client-linux-amd64.tar.gz
kubernetes-node-linux-amd64.tar.gz
kubernetes-server-linux-amd64.tar.gz
kubernetes.tar.gz

# 将以上四个都解压，得到一个目录：kubernetes
$pwd
/usr/local/src/kubernetes/server/bin
$ll
total 986844
drwxr-xr-x 2 root root      4096 Feb 19 00:26 ./
drwxr-xr-x 3 root root      4096 Feb 19 00:30 ../
-rwxr-xr-x 1 root root  46710784 Feb 19 00:26 apiextensions-apiserver*
-rwxr-xr-x 1 root root  39251968 Feb 19 00:26 kubeadm*
-rwxr-xr-x 1 root root  44699648 Feb 19 00:26 kube-aggregator*
-rwxr-xr-x 1 root root 118218752 Feb 19 00:26 kube-apiserver*
-rw-r--r-- 1 root root         8 Feb 19 00:24 kube-apiserver.docker_tag
-rw------- 1 root root 123035136 Feb 19 00:24 kube-apiserver.tar
-rwxr-xr-x 1 root root 112758784 Feb 19 00:26 kube-controller-manager*
-rw-r--r-- 1 root root         8 Feb 19 00:24 kube-controller-manager.docker_tag
-rw------- 1 root root 117575168 Feb 19 00:24 kube-controller-manager.tar
-rwxr-xr-x 1 root root  40263680 Feb 19 00:26 kubectl*
-rwxr-xr-x 1 root root 114113512 Feb 19 00:26 kubelet*
-rwxr-xr-x 1 root root  39518208 Feb 19 00:26 kube-proxy*
-rw-r--r-- 1 root root         8 Feb 19 00:24 kube-proxy.docker_tag
-rw------- 1 root root 120411648 Feb 19 00:24 kube-proxy.tar
-rwxr-xr-x 1 root root  43745280 Feb 19 00:26 kube-scheduler*
-rw-r--r-- 1 root root         8 Feb 19 00:24 kube-scheduler.docker_tag
-rw------- 1 root root  48561664 Feb 19 00:24 kube-scheduler.tar
-rwxr-xr-x 1 root root   1634304 Feb 19 00:26 mounter*

master

  1. 关闭服务

    $systemctl stop \
 kube-apiserver.service \
 kubelet.service \
 kube-scheduler.service \
 kube-controller-manager.service \
 kube-proxy.service

  2. 拷贝新版本，覆盖旧版本

    scp kube-apiserver kubelet kube-scheduler kube-controller-manager kube-proxy kubectl 10.0.1.31:/usr/local/bin

  3. 启动服务

    $systemctl start \
 kube-apiserver.service \
 kubelet.service \
 kube-scheduler.service \
 kube-controller-manager.service \
 kube-proxy.service

注：因为 master 做了 haproxy+keepalived，所以只要不是全部 master 同时关闭服务就没问题，其实都全部 master 都关闭服务，短时间也没事

node

  1. 关闭服务

    $systemctl stop kubelet.service kube-proxy.service

  2. 拷贝新版本，覆盖旧版本

    scp kubelet kube-proxy kubectl 10.0.1.33:/usr/local/bin

  3. 启动服务

    $systemctl start kubelet.service kube-proxy.service

注：关闭 kubelet 和 kube-proxy 不影响访问已经创建的 Pod

如果 node 数量比较多，写个脚本循环升级即可

大版本升级

运维 > Kubernetes
#k8s
kubeasz
http://blog.lujinkai.cn/运维/Kubernetes/kubeasz/
作者
像方便面一样的男子
发布于
2021年1月24日
更新于
2023年12月5日
许可协议