[红帽] RHCE8.2考试Podman容器新增练习题解析

# 准备工作，考试时无需做

[student@workstation ~]$ lab containers-services start
[student@workstation ~]$ ssh servera
[student@servera ~]$ sudo useradd contsvc
[student@servera ~]$ sudo passwd contsvc
Changing password for user contsvc.
New password: [redhat]
BAD PASSWORD: The password is shorter than 8 characters
Retype new password: [redhat]
passwd: all authentication tokens updated successfully.

# 接着开始做题，14 题做题之前，要结合15题一起综合考虑

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[student@servera ~]$ ssh contsvc@servera
[contsvc@servera ~]$ mkdir -p ~/.config/containers
[contsvc@servera ~]$ cp /tmp/containers-services/registries.conf ~/.config/containers/
[contsvc@servera ~]$ mkdir -p ~/container_journal
[contsvc@servera ~]$ su - root
[root@servera ~]# vim /etc/systemd/journald.conf
Storage=persistent
[root@servera ~]# reboot
[student@workstation ~]$ ssh contsvc@servera
[contsvc@servera ~]$ ls /var/log/journal/ # 检查有日志产生
f874df04639f474cb0a9881041f4f7d4
[contsvc@servera ~]$ cp -av /var/log/journal/*  ~/container_journal/
[contsvc@servera ~]$ ls -R container_journal/
container_journal/:
f874df04639f474cb0a9881041f4f7d4

container_journal/f874df04639f474cb0a9881041f4f7d4:
user-1002.journal

[contsvc@servera ~]$ loginctl enable-linger
[contsvc@servera ~]$ loginctl show-user contsvc|tail -n 1
Linger=yes

[contsvc@servera ~]$ podman login registry.lab.example.com
Username: admin
Password: [redhat321]
Login Succeeded!

[contsvc@servera ~]$ podman search httpd #教学环境不能搜到，可以使用` $ podman search registry.lab.example.com/ `
[contsvc@servera ~]$ podman run -d --name=httpserver -v /home/contsvc/container_journal/ registry.lab.example.com/rhel8/httpd-24
[contsvc@servera ~]$ mkdir -p ~/.config/systemd/user
[contsvc@servera ~]$ cd !$

[contsvc@servera user]$ podman generate systemd --name httpserver --files --new
[contsvc@servera user]$ ls
container-httpserver.service
[contsvc@servera user]$ podman stop httpserver && podman rm httpserver
[contsvc@servera user]$ podman ps #验证为空
[contsvc@servera user]$ systemctl --user daemon-reload
[contsvc@servera user]$ systemctl --user enable container-httpserver.service --now
[contsvc@servera user]$ podman ps
CONTAINER ID  IMAGE                                           COMMAND               CREATED         STATUS             PORTS  NAMES
d1d6c0db8e15  registry.lab.example.com/rhel8/httpd-24:latest  /usr/bin/run-http...  17 seconds ago  Up 17 seconds ago         httpserver

[contsvc@servera user]$ systemctl reboot -i
# 重启验证

[contsvc@servera ~]$ podman ps
CONTAINER ID  IMAGE                                           COMMAND               CREATED        STATUS            PORTS  NAMES
dddbc043474f  registry.lab.example.com/rhel8/httpd-24:latest  /usr/bin/run-http...  3 minutes ago  Up 3 minutes ago         httpserver

[contsvc@servera ~]$ podman inspect httpserver |grep 'journal'