Ubuntu部署kubeadm

实践目标

• 安装kubeadm
• 安装kubelet
• 安装kubectl

本来打算按照极客时间的文章进行部署的，结果方法好像早就过时了，难蹦，但是还好有官方文档。

安装kubeadm

1.更新apt缓存并且安装必备软件包

sudo apt-get update
# apt-transport-https may be a dummy package; if so, you can skip that package
sudo apt-get install -y apt-transport-https ca-certificates curl gpg

2.下载kubernetes的公共签名密钥，全部共用所以可以忽略URL中的版本信息

# If the directory `/etc/apt/keyrings` does not exist, it should be created before the curl command, read the note below.
# sudo mkdir -p -m 755 /etc/apt/keyrings
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

Note: In releases older than Debian 12 and Ubuntu 22.04, directory /etc/apt/keyrings does not exist by default, and it should be created before the curl command.

3.写入apt仓库

# This overwrites any existing configuration in /etc/apt/sources.list.d/kubernetes.list
echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list

注意此举会覆盖原文件中的所有内容（如果有这个文件的话）

4.更新apt目录，安装kubelet，kubeadm和kubectl，然后锁定他们的版本

sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl

5.（可选）kubelet跟随kubeadm启动

sudo systemctl enable --now kubelet