Microk8s up and running with ubuntu 18.04 fresh install

在 ubuntu 18.04 server edition 安裝時, 選擇 Microk8s. (或是照這個官方文件安裝)

記得關掉 swap

ubuntu@ubuntu_server:~$ sudo swapoff -a

檢查 Microk8s 狀態, 咦, 怎麼沒權限. 照著提示設定一下 user 的 Microk8s group 權限

ubuntu@ubuntu_server:~$ microk8s status
Insufficient permissions to access MicroK8s.
You can either try again with sudo or add the user ubuntu to the ‘microk8s’ group:
sudo usermod -a -G microk8s ubuntu
 sudo chown -f -R ubuntu ~/.kube
The new group will be available on the user’s next login.
ubuntu@ubuntu_server:~$ sudo usermod -aG sudo ubuntu

還是沒跑起來, 乖乖用 ispect 看一下有沒有進一步 log

ubuntu@ubuntu_server:~$ microk8s status
microk8s is not running. Use microk8s inspect for a deeper inspection.
ubuntu@ubuntu_server:~$ microk8s inspect
...(skipped)
WARNING: This machine’s hostname contains capital letters and/or underscores.
 This is not a valid name for a Kubernetes node, causing node registration to fail.
 Please change the machine’s hostname or refer to the documentation for more details:
 https://microk8s.io/docs/troubleshooting#heading--common-issues
Building the report tarball
 Report tarball is at /var/snap/microk8s/1791/inspection-report-20201202_163221.tar.gz

原來是 hostname ubuntu_server 不符合 Kubernetest node naming

ubuntu@ubuntu_server:~$ hostname
ubuntu_server
ubuntu@ubuntu_server:~$ hostnamectl
 Static hostname: ubuntu_server

設定一下 reboot

ubuntu@ubuntu_server:~$ sudo hostnamectl set-hostname testServer
ubuntu@ubuntu_server:~$ sudo vim /etc/hosts
ubuntu@ubuntu_server:~$ sudo reboot now

收工

ubuntu@testServer:~$ microk8s status
microk8s is running