Question

我刚刚开始查看coreos

我曾尝试设置redis和mysql docker实例，但几乎没有成功。

我最初期望一切都可以开箱即用，但似乎并非如此。

所以基于coreos网站上的这个documentation on systemd，我决定尝试这个来启动我的docker instace

cd /etc/systemd/system

sudo systemctl enable redis.service
$ sudo systemctl start redis.service

这不起作用。

我使用docker事件来跟踪其初始化

docker event &

我不确定我可能错过了什么..

这是我的云配置文件

#cloud-config
hostname: user1
# include one or more SSH public keys
ssh_authorized_keys:
  - ssh-rsa....
users:
  - name: user2
    passwd: temp123
    groups:
      - sudo
      - docker
    ssh-authorized-keys:
      - ssh-rsa....
coreos:
  etcd2:
    #generate a new token for each unique cluster from https://discovery.etcd.io/new?size=#{number_instances}
    discovery: https://discovery.etcd.io/fdadfadjskd546887878kfksdjfds
    # multi-region and multi-cloud deployments need to use 1.1.1.1
    advertise-client-urls: http://1.1.1.1:2379
    initial-advertise-peer-urls: http://2.2.2.2:2380
    # listen on both the official ports and the legacy ports
    # legacy ports can be omitted if your application doesn't depend on them
    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
    listen-peer-urls: http://2.2.2.2:2380,http://2.2.2.2:7001
  fleet:
    public-ip: 1.1.1.1
  flannel:
    interface: 3.3.3.51/23
  units:
    - name: systemd-networkd
      command: stop
    - name: 00-static.network
      runtime: true
      content:   "[Match]\n\
        Name=ens19\n\
        [Network]\n\
        Address=3.3.3.3/23\n\
        Gateway=3.3.3.255\n\
        DNS=8.8.8.8\n\
        DNS=8.8.4.4  \n"
    - name: systemd-networkd
      command: start
    - name: etcd2.service
      command: start
    - name: fleet.service
      command: start
    - name: redis.service
      command: start
      enable: true
      content: "[Unit]\n\
        Description=Redis Server Docker Container\n\
        After=docker.service\n\
        Requires=docker.service\n\
        [Service]\n\
        TimeoutStartSec=0 \n\
        EnvironmentFile=/etc/environment\n\
        ExecStartPre=-/usr/bin/docker kill %p\n\
        ExecStartPre=-/usr/bin/docker rm %p\n\
        ExecStartPre=/usr/bin/docker pull redis:latest \n\
        ExecStart=/usr/bin/docker run --name=redis --detach=true --publish=6379:6379 redis \n\
        ExecStop=/usr/bin/docker stop redis \n\
        [Install] \n\
        WantedBy=multi-user.target \n"
    - name: mysql.service
      command: start
      enable: true
      content: "[Unit]\n\
        Description=MySQL Server Docker Container\n\
        After=docker.service\n\
        Requires=docker.service\n\
        [Service]\n\
        TimeoutStartSec=0 \n\
        EnvironmentFile=/etc/environment\n\
        ExecStartPre=-/usr/bin/docker kill %p\n\
        ExecStartPre=-/usr/bin/docker rm %p\n\
        ExecStartPre=/usr/bin/docker pull mysql:latest \n\
        ExecStart=/usr/bin/docker run --name=mysql --env MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD} --env MYSQL_USER=${MYSQL_USER} --env MYSQL_PASSWORD=${MYSQL_PASSWORD} --env MYSQL_DATABASE=${MYSQL_DATABASE} --detach --publish 3306:3306 --volume=/path/to/dumps/:/dumps/ mysql\n\
        ExecStop=/usr/bin/docker stop mysql\n\
        [Install] \n\
        WantedBy=multi-user.target \n"
write_files:
  - path: /etc/environment
    permissions: 0644
    content: "\nMYSQL_USER='user1'\n\
      MYSQL_DATABASE='db1'\n\
      MYSQL_CONTAINER_NAME='mysql'\n\
      MYSQL_ROOT_PASSWORD=$(cat /dev/urandom | LC_CTYPE=C tr -dc 'a-zA-Z0-9' | fold -w 32 | sed 1q) \n"

Answer 1

您正在以分离模式运行redis容器，因此docker实用程序启动容器然后退出。从systemd的角度来看，这看起来像是受控进程退出，因此systemd会执行ExecStop脚本，在您的情况下会停止redis容器。

您需要保持进程运行，以便systemd不会尝试停止或重新启动容器。实现此目的的一种方法是删除--detach标志。您也可以使用KillMode=none，因此systemd不会将SIGTERM发送到docker实用程序，但只会执行ExecStop。

[Unit]
Requires=docker.service
After=docker.service

[Service]
TimeoutStartSec=0
KillMode=none
Restart=always
RestartSec=5s


ExecStartPre=-/usr/bin/docker kill %p
ExecStartPre=-/usr/bin/docker rm -v %p

ExecStart=/usr/bin/docker --name=redis --publish=6379:6379 redis

ExecStop=/usr/bin/docker stop %p
ExecStopPost=-/usr/bin/docker stop %p

Docker Container不会以systemctl启动

1 个答案: