centos7安装使用yum安装Containerd

1、关闭firewalld

systemctl stop firewalld
systemctl disable firewalld

2、关闭 swap

# 临时关闭；关闭swap主要是为了性能考虑
swapoff -a
# 可以通过这个命令查看swap是否关闭了
free
# 永久关闭
sed -ri 's/.*swap.*/#&/' /etc/fstab

3、 禁用SElinux

# 临时关闭
setenforce 0
# 永久禁用
sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/' /etc/selinux/config

4、 安装Containerd

sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
# 或
wget -O /etc/yum.repos.d/docker-ce.repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

sudo yum install containerd -y
systemctl enable containerd
systemctl start containerd

5、 配置containerd，修改sandbox_image 镜像源

#导出默认配置，config.toml这个文件默认是不存在的
containerd config default > /etc/containerd/config.toml

# 修改前检查
grep sandbox_image  /etc/containerd/config.toml

# 修改sandbox_image 镜像源，1.24以下k8s.gcr.io 、1.25 改成了registry.k8s.io
sed -i "s#registry.k8s.io/pause#registry.aliyuncs.com/google_containers/pause#g" /etc/containerd/config.toml

# 修改后检查
grep sandbox_image  /etc/containerd/config.toml

6、 配置containerd cgroup 驱动程序systemd

把SystemdCgroup = false修改为：SystemdCgroup = true，
sed -i 's/SystemdCgroup = false/SystemdCgroup = true/g' /etc/containerd/config.toml

7、 Containerd配置镜像加速

#在endpoint位置添加阿里云的镜像源

vi /etc/containerd/config.toml
    [plugins."io.containerd.grpc.v1.cri".registry]
      [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
        [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
          endpoint = ["阿里云镜像源" ,"https://registry-1.docker.io"]

7、 重启 containerd

systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd

8、 查看是否启动成功

systemctl status containerd