Ceph入门到精通-Podman设置容器开机自启

步骤总结：

1.启动一个容器
# podman run -d --name web httpd

2.查看该容器
# podman ps

3.每次都启动新容器方式创建servcie //--new参数，每次启动都删除旧容器，启动一个新容器 
# podman generate systemd -n --new -f web

4.查看启动文件
# cat /root/container-web.service

5.将server文件保存在/etc/systemd/system/
# mv /root/container-web.service /etc/systemd/system/

6.刷新配置文件，让其生效
# systemctl daemon-reload

7.修改selinux
# cat config |grep SELINUX=disabled

8.设置容器开机自启，并且现在启动
# systemctl enable --now /etc/systemd/system/container-web.service

9.测试，重启虚拟机
# reboot

10.查看容器是否在运行，并查看container-web.service是否开机自启和运行
# podman ps

1. //启动一个容器

[root@SYL2 ~]# podman run -d --name web httpd
WARN[0000] Ignoring global metacopy option, not supported with booted kernel 
a1e07f4e884a7553aee1ea04bff6813d2440316287f6e7a62b4b7a5a884bad1a
[root@SYL2 ~]# podman ps
CONTAINER ID  IMAGE                           COMMAND           CREATED         STATUS             PORTS       NAMES
a1e07f4e884a  docker.io/library/httpd:latest  httpd-foreground  12 seconds ago  Up 12 seconds ago              web

2. //每次都启动新容器方式创建servcie //--new参数，每次启动都删除旧容器，启动一个新容器 
[root@SYL2 ~]# podman generate systemd -n --new -f web
/root/container-web.service
[root@SYL2 ~]# cat container-web.service 
# container-web.service
# autogenerated by Podman 4.0.2
# Tue May 10 17:38:39 CST 2022

[Unit]
Description=Podman container-web.service
Documentation=man:podman-generate-systemd(1)
Wants=network-online.target
After=network-online.target
RequiresMountsFor=%t/containers

[Service]
Environment=PODMAN_SYSTEMD_UNIT=%n
Restart=on-failure
TimeoutStopSec=70
ExecStartPre=/bin/rm -f %t/%n.ctr-id
ExecStart=/usr/bin/podman run --cidfile=%t/%n.ctr-id --cgroups=no-conmon --rm --sdnotify=conmon --replace -d --name web httpd
ExecStop=/usr/bin/podman stop --ignore --cidfile=%t/%n.ctr-id
ExecStopPost=/usr/bin/podman rm -f --ignore --cidfile=%t/%n.ctr-id
Type=notify
NotifyAccess=all

[Install]
WantedBy=default.target


3. //将server文件保存在/etc/systemd/system/
[root@SYL2 ~]# mv container-web.service /etc/systemd/system/

4. //刷新配置文件，让其生效
[root@SYL2 ~]# systemctl daemon-reload
[root@SYL2 ~]# 

5. //修改selinux
[root@SYL2 ~]# setenforce 0
[root@SYL2 ~]# cd /etc/selinux/
[root@SYL2 selinux]# ls
config  semanage.conf  targeted
[root@SYL2 selinux]# vim config 
[root@SYL2 selinux]# cat config |grep SELINUX=disabled
SELINUX=disabled

6. //设置容器开机自启，并且现在启动
[root@SYL2 ~]# cd /etc/systemd/system
[root@SYL2 system]# systemctl enable --now container-web.service 
Created symlink /etc/systemd/system/default.target.wants/container-web.service → /etc/systemd/system/container-web.service.
[root@SYL2 system]# systemctl status container-web.service 
● container-web.service - Podman container-web.service
   Loaded: loaded (/etc/systemd/system/container-web.service; ena>
   Active: active (running) since Tue 2022-05-10 17:54:20 CST; 25>
     Docs: man:podman-generate-systemd(1)
  Process: 246294 ExecStartPre=/bin/rm -f /run/container-web.serv>
 Main PID: 246464 (conmon)
    Tasks: 3 (limit: 11175)
   Memory: 3.1M
   CGroup: /system.slice/container-web.service
           ├─246413 /usr/bin/fuse-overlayfs -o lowerdir=/var/lib/>
           └─246464 /usr/bin/conmon --api-version 1 -c 14105dc4b4>

May 10 17:54:18 SYL2 systemd[1]: Starting Podman container-web.se>
May 10 17:54:20 SYL2 podman[246295]: a1e07f4e884a7553aee1ea04bff6>
May 10 17:54:20 SYL2 podman[246295]: time="2022-05-10T17:54:20+08>
May 10 17:54:20 SYL2 systemd[1]: Started Podman container-web.ser>
May 10 17:54:20 SYL2 podman[246295]: 14105dc4b4d1b76aa754acf7bc3c>
[root@SYL2 system]# 

7. //测试，重启虚拟机
[root@SYL2 system]# reboot

    
8.  //查看容器是否在运行，并查看container-web.service是否开机自启和运行
[root@SYL2 ~]# podman ps
CONTAINER ID  IMAGE                           COMMAND           CREATED             STATUS                 PORTS       NAMES
4ebc4b868781  docker.io/library/httpd:latest  httpd-foreground  About a minute ago  Up About a minute ago              web
[root@SYL2 ~]# reboot

连接断开
连接主机...
连接主机成功
Last login: Tue May 10 17:59:50 2022 from 192.168.232.1
[root@SYL2 ~]# podman ps
CONTAINER ID  IMAGE                           COMMAND           CREATED         STATUS             PORTS       NAMES
12340a3083c4  docker.io/library/httpd:latest  httpd-foreground  54 seconds ago  Up 54 seconds ago              web
[root@SYL2 ~]# cd /etc/systemd/system
[root@SYL2 system]# systemctl status container-web.service 
● container-web.service - Podman container-web.service
   Loaded: loaded (/etc/systemd/system/container-web.service; ena>
   Active: active (running) since Tue 2022-05-10 18:00:24 CST; 1m>
     Docs: man:podman-generate-systemd(1)
  Process: 1116 ExecStartPre=/bin/rm -f /run/container-web.servic>
 Main PID: 1447 (conmon)
    Tasks: 3 (limit: 11175)
   Memory: 73.9M
   CGroup: /system.slice/container-web.service
           ├─1330 /usr/bin/fuse-overlayfs -o lowerdir=/var/lib/co>
           └─1447 /usr/bin/conmon --api-version 1 -c 12340a3083c4>

May 10 18:00:24 SYL2 systemd[1]: Starting Podman container-web.se>
May 10 18:00:24 SYL2 podman[1121]: time="2022-05-10T18:00:24+08:0>
May 10 18:00:24 SYL2 systemd[1]: Started Podman container-web.ser>
May 10 18:00:24 SYL2 podman[1121]: 12340a3083c4dfda5fc0124dcbf4e9>
[root@SYL2 system]# 

[root@SYL2 ~]# podman ps
CONTAINER ID  IMAGE                           COMMAND           CREATED        STATUS            PORTS       NAMES
12340a3083c4  docker.io/library/httpd:latest  httpd-foreground  7 minutes ago  Up 7 minutes ago              web
[root@SYL2 ~]# podman inspect web|grep -i ipaddr
               "IPAddress": "10.88.0.2",
                         "IPAddress": "10.88.0.2",
[root@SYL2 ~]# curl 10.88.0.2
It works!
[root@SYL2 ~]#