microk8s部署多节点Kubernetes集群

为了增加工作量，想上一个k8s。microk8s安装简单还支持多节点，就选它了。

准备和安装

snap没有换源一说，只能设置代理。

先设置systemd editor的默认编辑器为vim

vim /etc/profile

加入以下内容

export SYSTEMD_EDITOR="/usr/bin/vim"

使设置生效

source /etc/profile

配置snapd

systemctl edit snapd

加入以下内容

[Service]
Environment="http_proxy=http://127.0.0.1:1080"
Environment="https_proxy=http://127.0.0.1:1080"

配置生效

systemctl daemon-reload
systemctl restart snapd

安装microk8s

snap install microk8s --classic

查看组件状态

> microk8s.status
microk8s is running
addons:
cilium: disabled
dashboard: disabled
dns: disabled
fluentd: disabled
gpu: disabled
helm: disabled
ingress: disabled
istio: disabled
jaeger: disabled
juju: disabled
knative: disabled
kubeflow: disabled
linkerd: disabled
metallb: disabled
metrics-server: disabled
prometheus: disabled
rbac: disabled
registry: disabled
storage: disabled

构建多节点集群

在一台机器上执行

microk8s.add-node

会出现以下内容

Join node with: microk8s.join ip-172-31-20-243:25000/DDOkUupkmaBezNnMheTBqFYHLWINGDbf

复制join指令到其它已经安装了microk8s的机器上执行。

查看集群内节点

> microk8s.kubectl get no
10.22.254.79       Ready       27s   v1.15.3
ip-172-31-20-243   Ready       53s   v1.15.3