我正在使用最新版本的 ansible 和 python
我写了一个描述我面临的问题的测试用例。
我运行下面的 shell 脚本并传递三个应用程序名称，每个应用程序名称都是在同一节点上执行任务并休眠（等待）10 秒的 ansible 角色，这意味着它将执行超过（3X10）30 秒，如果执行不是并行的
下面是我用来运行我的 ansible-roles 剧本的 shell 脚本和角色的代码：
cat /web/admin/playbooks/testpar/run_me_for_restarts.sh
SH_APP=$1
echo "OK... Let us execute the Ansible Playbook now..."
for i in $(echo $SH_APP | sed "s/,/ /g")
do
ansible-playbook -v -i /web/admin/playbooks/testpar/va.hosts /web/admin/playbooks/testpar/va_action.yml -e APPNAME=$i
done
$ cat /web/admin/playbooks/testpar/va_action.yml
---
- hosts: localhost
user: wladmin
strategy: free
vars:
ansible_ssh_extra_args: -o StrictHostKeyChecking=no -o ServerAliveInterval=50
roles:
- { role: "{{APPNAME}}" }
cat /web/admin/playbooks/testpar/roles/<appname>/tasks/main.yml
---
- name: Copying the Startup Wrap-up script to the Domain_Home/bin directory
template:
src: "{{role_path}}/templates/wrapper.j2"
dest: "/tmp"
mode: 0744
- name: Executing sleep task
command: "/tmp/wrapper.j2 &"
ignore_errors: yes
cat /web/admin/playbooks/testpar/roles/<appname>/templates/wrapper.j2
#!/bin/sh
echo "started ...." >/tmp/par_{{ APPNAME }}.log
sleep 10
echo "done ...." >/tmp/par_{{ APPNAME }}.log
下面的输出显示执行不是并行的，需要 43 秒而不是 10+ 秒
time /web/admin/playbooks/testpar/run_me_for_restarts.sh appone,apptwo,appthree
OK... Let us execute the Ansible Playbook now...
Using /etc/ansible/ansible.cfg as config file
PLAY [localhost] **********************************************************************************************
TASK [Gathering Facts] ****************************************************************************************
ok: [localhost]
TASK [appone : Copying the Startup Wrap-up script to the Domain_Home/bin directory] **************************
changed: [localhost] => {"changed": true, "checksum": "543c342a48380d78929cecacfb0319c5575d6d5d", "dest": "/tmp/wrapper.j2", "gid": 64332, "group": "wladmin", "md5sum": "36126e45f90db4ebf16260582cca00c4", "mode": "0744", "owner": "wladmin", "size": 100, "src": "/home/wladmin/.ansible/tmp/ansible-tmp-1623398176.73-12084-156235215973593/source", "state": "file", "uid": 600000008}
TASK [appone : Executing sleep task] **********************************
changed: [localhost] => {"changed": true, "cmd": ["/tmp/wrapper.j2", "&"], "delta": "0:00:10.008392", "end": "2021-06-11 02:56:28.387822", "rc": 0, "start": "2021-06-11 02:56:18.379430", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
PLAY RECAP ****************************************************************************************************
localhost : ok=3 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Using /etc/ansible/ansible.cfg as config file
PLAY [localhost] **********************************************************************************************
TASK [Gathering Facts] ****************************************************************************************
ok: [localhost]
TASK [apptwo : Copying the Startup Wrap-up script to the Domain_Home/bin directory] **************************
changed: [localhost] => {"changed": true, "checksum": "bc42fc98344e9de310dc618c6e79de5db7a59de1", "dest": "/tmp/wrapper.j2", "gid": 64332, "group": "wladmin", "md5sum": "2c151bf785a5f7b0fca4b58cf238d50e", "mode": "0744", "owner": "wladmin", "size": 100, "src": "/home/wladmin/.ansible/tmp/ansible-tmp-1623398190.63-12266-31151611835797/source", "state": "file", "uid": 600000008}
TASK [apptwo : Executing sleep task] **********************************
changed: [localhost] => {"changed": true, "cmd": ["/tmp/wrapper.j2", "&"], "delta": "0:00:10.007971", "end": "2021-06-11 02:56:42.306926", "rc": 0, "start": "2021-06-11 02:56:32.298955", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
PLAY RECAP ****************************************************************************************************
localhost : ok=3 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Using /etc/ansible/ansible.cfg as config file
PLAY [localhost] **********************************************************************************************
TASK [Gathering Facts] ****************************************************************************************
ok: [localhost]
TASK [appthree : Copying the Startup Wrap-up script to the Domain_Home/bin directory] ******************************
changed: [localhost] => {"changed": true, "checksum": "876833744db44de5afaabe598a31341b6fc800ac", "dest": "/tmp/wrapper.j2", "gid": 64332, "group": "wladmin", "md5sum": "651fb5088564dc481b92401e28267f8e", "mode": "0744", "owner": "wladmin", "size": 92, "src": "/home/wladmin/.ansible/tmp/ansible-tmp-1623398205.43-12442-191618850932513/source", "state": "file", "uid": 600000008}
TASK [appthree : Executing sleep task] **************************************
changed: [localhost] => {"changed": true, "cmd": ["/tmp/wrapper.j2", "&"], "delta": "0:00:10.010776", "end": "2021-06-11 02:56:57.241882", "rc": 0, "start": "2021-06-11 02:56:47.231106", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
PLAY RECAP ****************************************************************************************************
localhost : ok=3 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
real 0m43.077s
user 0m13.285s
sys 0m3.957s
这三个/tmp/par_<appname>.log确实生成了。
我尝试&在我的 shell 脚本中添加 ansible-playbook 命令，因此每个应用程序都是一个新的 ansible-playbook 任务，它并行运行但只生成一个/tmp/par_<appname>.log而不是全部三个。此外，执行似乎需要与以前相同的时间。
cat /web/admin/playbooks/testpar/run_me_for_restarts.sh
SH_APP=$1
echo "OK... Let us execute the Ansible Playbook now..."
for i in $(echo $SH_APP | sed "s/,/ /g")
do
ansible-playbook -v -i /web/admin/playbooks/testpar/va.hosts /web/admin/playbooks/testpar/va_action.yml -e APPNAME=$i **&**
done
输出&更改：
time /web/admin/playbooks/testpar/run_me_for_restarts.sh appone,apptwo,appthree
OK... Let us execute the Ansible Playbook now...
real 0m0.010s
user 0m0.003s
sys 0m0.008s
[wladmin@localhost testpar]$ Using /etc/ansible/ansible.cfg as config file
Using /etc/ansible/ansible.cfg as config file
Using /etc/ansible/ansible.cfg as config file
PLAY [localhost] ***************************************************************
TASK [Gathering Facts] *********************************************************
PLAY [localhost] ***************************************************************
TASK [Gathering Facts] *********************************************************
PLAY [localhost] ***************************************************************
TASK [Gathering Facts] *********************************************************
ok: [localhost]
TASK [apptwo : Copying the Startup Wrap-up script to the Domain_Home/bin directory] ***
ok: [localhost]
TASK [appone : Copying the Startup Wrap-up script to the Domain_Home/bin directory] ***
ok: [localhost]
TASK [appthree : Copying the Startup Wrap-up script to the Domain_Home/bin directory] ***
changed: [localhost] => {"changed": true, "checksum": "bc42fc98344e9de310dc618c6e79de5db7a59de1", "dest": "/tmp/wrapper.j2", "gid": 64332, "group": "wladmin", "md5sum": "2c151bf785a5f7b0fca4b58cf238d50e", "mode": "0744", "owner": "wladmin", "size": 100, "src": "/home/wladmin/.ansible/tmp/ansible-tmp-1623397469.29-10776-21357236583355/source", "state": "file", "uid": 600000008}
.....
.....
我在这里阅读了有关 ansible 角色并行执行的内容如何在 Ansible 剧本中并行运行几个角色？然而，
您能否建议我如何让三个应用程序任务并行运行，这样我只需要大约 10 多秒？调整，解决方法也将受到赞赏。
如果此解决方案对我永远不起作用，请通过示例提出替代方法。