docker(三)

容器间的互连

• 启动一个容器

$ docker run -d nginx:latest
$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
2ac062d90d92        nginx:latest        "nginx -g 'daemon of…"   4 seconds ago       Up 3 seconds        80/tcp              ecstatic_ellis

• 在启动一个容器并进入容器内, 通过--link连接上一个容器, 可以查看到--link参数可以在容器内多添加一条本地反向dns解析的字符串

$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
3a80e6d74207        nginx               "nginx -g 'daemon of…"   7 hours ago         Up 7 hours          80/tcp              epic_pasteur
$ docker run -it --link epic_pasteur:web01 centos:6.9

$ curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

$ grep '172.17.0.2' /etc/hosts
172.17.0.2	web01 2ac062d90d92 ecstatic_ellis

$ mount |grep '/dev/mapper/centos-root'
/dev/mapper/centos-root on /etc/resolv.conf type xfs (rw,seclabel,relatime,attr2,inode64,noquota)
/dev/mapper/centos-root on /etc/hostname type xfs (rw,seclabel,relatime,attr2,inode64,noquota)
/dev/mapper/centos-root on /etc/hosts type xfs (rw,seclabel,relatime,attr2,inode64,noquota)

• 在容器外查看容器的IP地址

$ docker inspect ecstatic_ellis |grep -w "IPAddress"|cut -d ':' -f 2 |uniq|cut -d ',' -f 1
 "172.17.0.2"
$ curl 172.17.0.2

使用docker运行zabbix-server

---

• 启动一个空的Mysql服务器实例

$ docker run --name mysql-server -t 
>       -e MYSQL_DATABASE="zabbix" 
>       -e MYSQL_USER="zabbix" 
>       -e MYSQL_PASSWORD="zabbix" 
>       -e MYSQL_ROOT_PASSWORD="zabbix" 
>       -d mysql:5.7  
> --character-set-server=utf8 --collation-server=utf8_bin

• 启动Zabbix server实例，并关联这个实例到已创建的MySQL服务器实例

$ docker run --name zabbix-server-mysql -t 
      -e DB_SERVER_HOST="mysql-server" 
      -e MYSQL_DATABASE="zabbix" 
      -e MYSQL_USER="zabbix" 
      -e MYSQL_PASSWORD="zabbix" 
      -e MYSQL_ROOT_PASSWORD="zabbix" 
      --link mysql-server:mysql 
      -p 10051:10051 
      -d zabbix/zabbix-server-mysql:latest

• 启动Zabbix web 接口，并将它与MySQL服务器实例和Zabbix server实例关联

$ docker run --name zabbix-web-nginx-mysql -t 
      -e DB_SERVER_HOST="mysql-server" 
      -e MYSQL_DATABASE="zabbix" 
      -e MYSQL_USER="zabbix" 
      -e MYSQL_PASSWORD="zabbix" 
      -e MYSQL_ROOT_PASSWORD="zabbix" 
      --link mysql-server:mysql 
      --link zabbix-server-mysql:zabbix-server 
      -p 8080:80 
      -d zabbix/zabbix-web-nginx-mysql:latest

• 查看容器的情况

$ docker ps
CONTAINER ID        IMAGE                                  COMMAND                  CREATED             STATUS              PORTS                           NAMES
58d3e7ec80bd        zabbix/zabbix-web-nginx-mysql:latest   "docker-entrypoint.sh"   3 minutes ago       Up 3 minutes        443/tcp, 0.0.0.0:8080->80/tcp   zabbix-web-nginx-mysql
99faf69bd73c        zabbix/zabbix-server-mysql:latest      "/sbin/tini -- /usr/…"   9 minutes ago       Up 9 minutes        0.0.0.0:10051->10051/tcp        zabbix-server-mysql
5debea7aa666        mysql:5.7                              "docker-entrypoint.s…"   13 minutes ago      Up 13 minutes       3306/tcp, 33060/tcp             mysql-server
2ac062d90d92        nginx:latest                           "nginx -g 'daemon of…"   About an hour ago   Up About an hour    80/tcp                          ecstatic_ellis

• 查看镜像

$ docker images
REPOSITORY                      TAG                 IMAGE ID            CREATED             SIZE
zabbix/zabbix-web-nginx-mysql   latest              9102571b2fef        3 days ago          155MB
zabbix/zabbix-server-mysql      latest              6da679c2a6c6        3 days ago          65.8MB
mysql                           5.7                 1e4405fe1ea9        8 days ago          437MB
nginx                           latest              231d40e811cd        8 days ago          126MB
centos                          6.9                 2199b8eb8390        8 months ago        195MB

• 访问web界面

  http://172.16.240.11:8080/

  帐号密码:
  Admin
  zabbix

# docker 镜像加速 ```bash vim /etc/docker/daemon.json { "registry-mirrors": [ "https://1nj0zren.mirror.aliyuncs.com", "https://docker.mirrors.ustc.edu.cn", "http://f1361db2.m.daocloud.io", "https://registry.docker-cn.com" ], "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": {"max-size": "100m"} }

systemctl restart docker

<br>
# docker registry

<hr>

```bash
docker pull registry:2.7.1
docker run -d -p 5000:5000 -p 8999:5000 --restart=always --name registry -v /opt/registry:/var/lib/registry registry:2.7.1

• 加入配置文件 (/lib/systemd/system/docker.service)

 vim /lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd --insecure-registry  172.16.240.110:8999

systemctl daemon-reload 
systemctl start docker
systemctl enable docker

- 加入配置文件 (`/etc/docker/daemon.json `)

vim /etc/docker/daemon.json 
{
       "registry-mirrors": [
        "https://1nj0zren.mirror.aliyuncs.com",
        "https://docker.mirrors.ustc.edu.cn",
        "http://f1361db2.m.daocloud.io",
        "https://registry.docker-cn.com"
    ],
     "insecure-registries" : [ "172.16.240.200:5000", "172.16.240.110:5000" ], 
     "exec-opts": ["native.cgroupdriver=systemd"],
     "log-driver": "json-file",
    "log-opts": {"max-size": "100m"}
}

systemctl restart docker

注意!!!!! `/lib/systemd/system/docker.service` 和 `/etc/docker/daemon.json ` 不能同时定义私有仓库, 否则会导致docker起不来

• 查看镜像目录

docker tag registry:2.7.1 172.16.240.110:8999/registry:2.7.1 
docker push 172.16.240.110:8999/registry:2.7.1

docker pull nginx:1.16.1
docker tag nginx:1.16.1 172.16.240.110:8999/nginx:1.16.1
docker push 172.16.240.110:8999/nginx:1.16.1 
curl -XGET http://172.16.240.110:8999/v2/_catalog

• 查看所有tags

curl -XGET http://172.16.240.110:8999/v2/nginx/tags/list