Install Kata Containers on CentOS

yum install wget -y
sudo -E dnf install -y centos-release-advanced-virtualization
sudo -E dnf module disable -y virt:rhel
source /etc/os-release
echo "[kata-containers]
name=Kata Containers
baseurl=http://mirrors.aliyun.com/\$contentdir/\$releasever/virt/\$basearch/kata-containers
enabled=1
gpgcheck=1
skip_if_unavailable=1
" > /etc/yum.repos.d/kata-containers.repo
sudo -E dnf install -y kata-containers

yum install yum-utils -y
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum -y install docker-ce

mkdir -p /etc/systemd/system/docker.service.d/
cat <<EOF | sudo tee /etc/systemd/system/docker.service.d/kata-containers.conf
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -D --add-runtime kata-runtime=/usr/bin/kata-runtime --default-runtime=kata-runtime
EOF
sudo mkdir -p /etc/docker

将以下定义添加到/etc/docker/daemon.json：

{
  "default-runtime": "kata-runtime",
  "runtimes": {
    "kata-runtime": {
      "path": "/usr/bin/kata-runtime"
    }
  }
}

使用以下命令重新启动Docker systemd服务：

sudo systemctl daemon-reload
sudo systemctl restart docker
测试
运行Kata Containers
sudo docker run busybox uname -a
此时命令显示了在容器内运行的内核版本的详细信息，这应与主机的内核版本不同。