安装docker

song__ge

于 2024-04-17 20:00:57 发布

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文章标签： docker 容器运维

本文链接：https://blog.youkuaiyun.com/song__ge/article/details/137862746

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本文指导如何在CentOS7上使用vmware创建Linux机器，更新yum源，安装必要的工具，配置内核转发，设置阿里云专属Docker仓库，安装Docker，管理版本并启用镜像加速器，确保Docker正常运行。

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提前准备好⼀个宿主机（ vmware 去创建⼀个 linux 机器，然后安装 docker 去使⽤）

基础环境配置

1、更新yum源并生成缓存

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum clean all && yum makecache

2、安装依赖工具

yum install -y bash-completion vim lrzsz wget expect net-tools nc 
yum -y install nmap tree dos2unix htop iftop iotop unzip telnet sl
yum -y install psmisc nethogs glances bc ntpdate openldap-devel

3、开启linux内核的流量转发

cat <<EOF > /etc/sysctl.d/docker.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.all.rp_filter = 0
net.ipv4.ip_forward=1
EOF

# 加载修改内核的参数，配置⽂件
# 按照如下命令，执⾏顺序
modprobe br_netfilter
sysctl -p /etc/sysctl.d/docker.conf

利用yum快速安装docker

提前配置好yum仓库---------阿里云提供的docker专属repo仓库

vim /etc/yum.repos.d/docker-ce.repo

[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/$basearch/stable
enabled=1
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-stable-debuginfo]
name=Docker CE Stable - Debuginfo $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/debug-$basearch/stable
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-stable-source]
name=Docker CE Stable - Sources
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/source/stable
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-test]
name=Docker CE Test - $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/$basearch/test
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-test-debuginfo]
name=Docker CE Test - Debuginfo $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/debug-$basearch/test
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-test-source]
name=Docker CE Test - Sources
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/source/test
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-nightly]
name=Docker CE Nightly - $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/$basearch/nightly
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-nightly-debuginfo]
name=Docker CE Nightly - Debuginfo $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/debug-$basearch/nightly
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

[docker-ce-nightly-source]
name=Docker CE Nightly - Sources
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$releasever/source/nightly
enabled=0
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg

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

更新yum缓存

yum clean all && yum makecache

yum安装docker

yum install docker-ce-20.10.6 -y

查看yum源中可用版本

yum list docker-ce --showduplicates | sort -r

卸载docker

yum remove -y docker-xxx

配置docker镜像加速器

mkdir -p /etc/docker
touch /etc/docker/daemon.json #必须先创建文件在编辑内容

vim /etc/docker/daemon.json
{
  "registry-mirrors" : [
   "https://8xpk5wnt.mirror.aliyuncs.com"
  ]
}

启动docker

systemctl daemon-reload
systemctl enable docker
systemctl restart docker

查看docker是否正常启动

docker version