一、安装 Docker

CentOS 7 安装 Docker:

1.1、卸载掉旧版本的 Docker

yum remove -y docker docker-client docker-client-latest docker-common \

docker-latest docker-latest-logrotate docker-logrotate \

docker-selinux docker-engine-selinux docker-engine

1.2、执行以下安装命令去安装依赖包

[root@centos7 ~] yum install -y yum-utils device-mapper-persistent-data lvm2

[root@centos7 ~] sudo yum-config-manager \

--add-repo \

[root@centos7 ~] yum -y install docker-ce docker-ce-cli containerd.io

[root@centos7 ~]# docker ps --查看docker

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? --docker没有启动

1.3、启动 Docker

[root@centos7 ~]#systemctl enable docker

Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

[root@centos7 ~]#systemctl start docker

[root@centos7 ~]#systemctl status docker

● docker.service - Docker Application Container Engine

Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)

Active: active (running) since Sat 2021-01-16 18:47:43 EST; 6s ago

Docs:

Main PID: 2435 (dockerd)

Memory: 45.1M

CGroup: /system.slice/docker.service

└─2435 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.051980834-05:00" level=info msg="ccResolverWrapper: ...e=grpc

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.051989827-05:00" level=info msg="ClientConn switchin...e=grpc

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.077331225-05:00" level=info msg="Loading containers: start."

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.382655173-05:00" level=info msg="Default bridge (doc...dress"

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.449861379-05:00" level=info msg="Loading containers: done."

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.463137686-05:00" level=warning msg="Not using native...erlay2

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.463311349-05:00" level=info msg="Docker daemon" comm...0.10.2

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.463380194-05:00" level=info msg="Daemon has complete...ation"

Jan 16 18:47:43 centos7 systemd[1]: Started Docker Application Container Engine.

Jan 16 18:47:43 centos7 dockerd[2435]: time="2021-01-16T18:47:43.493313812-05:00" level=info msg="API listen on /var/....sock"

Hint: Some lines were ellipsized, use -l to show in full.

[root@centos7 ~]# docker ps --查看容器

[root@centos7 ~]# docker version --查看版本

[root@centos7 ~]# docker info --查看版本

1.4.docker 创建容器时指定容器ip

Docker创建容器时默认采用bridge网络，自行分配ip，不允许自己指定。

在实际部署中，我们需要指定容器ip，不允许其自行分配ip，尤其是搭建集群时，固定ip是必须的。

我们可以创建自己的bridge网络： mynet，创建容器的时候指定网络为mynet并指定ip即可

[root@docker ~]# docker network ls -- 查看网络模式

[root@docker ~]# docker network create --driver bridge --subnet=172.18.12.0/16 --gateway=172.18.1.1 mynet -- 创建一个新的bridge网络

[root@docker ~]# docker network inspect mynet --查看网络信息

二、Mysql安装

[root@centos7 ~]# docker search mysql

[root@centos7 ~]# docker pull mysql:5.7.30

[root@centos7 ~]# docker pull mysql:8.0.20

#宿主机执行以下命令

mkdir -p /usr/local/mysql5730/

mkdir -p /usr/local/mysql8020/

【5.5.62版本】

docker run -d --name mysql5730 -h mysql5730 \

-p 233:22 -p 3607:3306 \

--network=mynet --ip 172.18.12.1 \

-v /sys/fs/cgroup:/sys/fs/cgroup \

-v /usr/local/mysql5730/conf:/etc/mysql/conf.d \

-e MYSQL_ROOT_PASSWORD=root -e TZ=Asia/Shanghai \

mysql:5.7.30

[root@centos7 ~]# docker update --restart=always mysql5730 --开机自启动

[root@centos7 ~]# docker exec -it mysql5730 bash

【8.0.20版本】

docker run -d --name mysql8020 -h mysql8020 \

-p 234:22 -p 3608:3306 \

--network=mynet --ip 172.18.12.2 \

-v /sys/fs/cgroup:/sys/fs/cgroup \

-v /usr/local/mysql8020/conf:/etc/mysql/conf.d \

-e MYSQL_ROOT_PASSWORD=root -e TZ=Asia/Shanghai \

mysql:8.0.20

[root@centos7 ~]# docker update --restart=always mysql8020 --开机自启动

[root@centos7 ~]# docker exec -it mysql8020 bash

ITPub博客

Mysql单实例安装-docker篇

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