RedHat运维-Ansible自动化运维基础27-管理启动进程和计划任务

1. ansible.posix.at：写一个playbook，让所有的受控主机在20分钟之后，执行命令ls -d / >/dev/null，确保这个任务是独一无二的；

2. ansible.posix.at：写一个playbook，确保任务ls -d / >/dev/null不存在；

3. ansible.posix.cron：写一个playbook，对于用户centos，每天的2点和5点都会运行任务ls -alh > /dev/null；

4. ansible.posix.cron：写一个playbook，对于用户centos，每周五16点每隔两分钟，都会运行任务ls -alh > /dev/null；

5. ansible.builtin.service：启动并开机自启httpd服务；

6. ansible.builtin.systemd：启动并开机自启httpd服务；

7. ansible.builtin.systemd：重新加载所有对于httpd配置的改动，然后重启httpd服务；

8. ansible.builtin.command：写一个playbook，将默认target设置为multi-user.target；

9. ansible.builtin.reboot：重启受控主机；

10. /* A20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.posix.at:

command: ls -d / >/dev/null

count: 20

units: minutes

unique: yes

...

2. /* B20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.posix.at:

command: ls -d / >/dev/null

state: absent

...

3. /* C20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.builtin.cron:

user: centos

name: job1

job: "ls -alh > /dev/null"

hour: "2,5"

...

4. /* D20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.builtin.cron:

user: centos

name: job2

job: "ls -alh > /dev/null"

weekday: "5"

hour: "16"

minute: "*/2"

...

5. /* E20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.builtin.service:

name: httpd

state: started

enabled: true

...

6. /* F20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.builtin.systemd:

name: httpd

state: started

enabled: true

...

7. /* G20240605.yaml */

---

• name: Play1

hosts: all

tasks:

• name: Task1

ansible.builtin.systemd:

name: httpd

state: reloaded

daemon_reload: yes

...

8. /* H20240605.yaml */

---

• name: Play1

hosts: all

vars:

• target: multi-user.target

tasks:

• name: Task1

ansible.builtin.command:

cmd: systemctl get-default

changed_when: false

register: Task1result

• name: Task2

ansible.builtin.command:

cmd: systemctl set-default {{ target }}

when: target not in Task1result.stdout

...

9. /* I20240605.yaml */

---

• name: Play1

hosts: centos7.example.com,centos8.example.com

tasks:

• name: Task1

ansible.builtin.reboot:

reboot_timeout: 180

...