基于centos7.9使用阿里源安装docker

docker

• • docker搭建
  • 配置镜像加速

官网介绍

本实验基于VMware17，使用centos7.9环境，net网卡，可上网

docker搭建

环境初始化，节点执行此脚本即可

#!/bin/bash

# 禁用Swap
echo "禁用Swap"
sudo sed -i '/swap/d' /etc/fstab
sudo swapoff -a

# 调整sysctl参数
echo "调整sysctl参数"
sudo tee -a /etc/sysctl.conf <<EOF
# 避免因过多的TIME_WAIT连接导致端口资源耗尽
net.ipv4.ip_local_port_range = 1024 65535
# 增加文件描述符限制，避免因为过多的文件句柄占用导致问题
fs.file-max = 2097152
# 提高网络性能
net.core.somaxconn = 65535
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 300
EOF
sudo sysctl -p

# 启用IP转发（可选）
echo "启用IP转发"
sudo sysctl -w net.ipv4.ip_forward=1

# SELinux配置（可选）
echo "SELinux配置"
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/g' /etc/selinux/config

使用阿里源仓库centos7.9

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

安装依赖

yum install -y yum-utils device-mapper-persistent-data lvm2

检查是否安装过docker，并清除

sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine \
                  podman \
                  runc

设置docker仓库

yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo

安装docker，默认安装最新版本。

yum -y install docker-ce

验证查看

[root@localhost ~]# docker version
Client: Docker Engine - Community
 Version:           26.0.1
 API version:       1.45
 Go version:        go1.21.9
 Git commit:        d260a54
 Built:             Thu Apr 11 10:56:30 2024
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          26.0.1
  API version:      1.45 (minimum version 1.24)
  Go version:       go1.21.9
  Git commit:       60b9add
  Built:            Thu Apr 11 10:55:26 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.31
  GitCommit:        e377cd56a71523140ca6ae87e30244719194a521
 runc:
  Version:          1.1.12
  GitCommit:        v1.1.12-0-g51d5e94
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

配置镜像加速

使用阿里源镜像加速

sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://s34fhadh.mirror.aliyuncs.com"]
}
EOF

重启生效

systemctl daemon-reload;systemctl restart docker

验证查看

[root@localhost ~]# docker info
Client: Docker Engine - Community
 Version:    26.0.1
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.13.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.26.1
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 2
  Running: 1
  Paused: 0
  Stopped: 1
 Images: 2
 Server Version: 26.0.1
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: e377cd56a71523140ca6ae87e30244719194a521
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
 Kernel Version: 3.10.0-1160.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 6
 Total Memory: 3.682GiB
 Name: localhost.localdomain
 ID: 52212388-7555-42c2-a629-04d54439d191
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://s34fhadh.mirror.aliyuncs.com/ #验证成功
 Live Restore Enabled: false

[root@localhost ~]#

daemon.json配置参数官网详解

允许在不启动 Docker 守护进程的情况下验证配置文件

dockerd --validate --config-file=/etc/docker/daemon.json

部分常用参数如下

{
  // 启用调试模式，输出更多调试信息到日志中
  "debug": true,

  // 默认的 IP 地址池配置，用于分配给容器的网络接口
  "default-address-pools": [
    {
      "base": "172.30.0.0/16",
      "size": 24
    },
    {
      "base": "172.31.0.0/16",
      "size": 24
    }
  ],

  // DNS 服务器地址
  "dns": [],

  // DNS 搜索域
  "dns-search": [],

  // 是否启用容器间通信
  "icc": false,

  // 日志驱动程序，用于指定 Docker 容器的日志输出方式
  "log-driver": "json-file",

  // 日志选项，包括日志的最大文件数和大小等配置
  "log-opts": {
    "max-size": "10m",
    "max-file": "5"
  },

  // 仓库镜像地址，用于配置 Docker 镜像的加速器
  "registry-mirrors": [],

  // 存储驱动程序，用于指定 Docker 容器的存储引擎
  "storage-driver": "",

  // 是否启用 TLS 加密通信
  "tls": true,

  // 是否验证 TLS 证书
  "tlsverify": true,

  // 不安全的仓库地址列表，用于指定不需要 TLS 加密的仓库地址
  "insecure-registries": []
}