ansible - 如何在 Ansible 中有效地使用主机组

Question

我正在为我的部署编写一个 ansible 脚本，但遇到了一个问题。我有 6 个 tomcat 节点，我在其中进行了滚动部署，即首先在 3 个节点上部署并对其进行测试。如果测试成功，则选择剩余的 3 个节点。我目前的库存看起来像这样 -

[prod]
prod-1-myapp
prod-2-myapp
prod-3-myapp
prod-4-myapp
prod-5-myapp
prod-6-myapp

[preprod]
preprod-cn-p1

我正在使用 group_vars 我必须prod.yml/preprod.yml在运行时上传配置。是否可以将此主机组分成 2 个并相应地部署在每个主机组上。prod.yml如果我像下面这样创建 2 个主机组，我如何在运行时使用我的。它将如何运作？

[prod-1]
prod-1-myapp
prod-2-myapp
prod-3-myapp

[prod-2]
prod-4-myapp
prod-5-myapp
prod-6-myapp

[preprod]
preprod-cn-p1

我当前的查询 -

ansible-playbook myapp-main.yml -e myapp_release_version=5.0.0 -e target_env=prod

myapp-main.yml

---
 - name: Starting with  Myapp Application deployment to tomcat nodes
   hosts: '{{ target_env }}'
   gather_facts: True
   any_errors_fatal: true
   roles:
     - role: deploy
       tags:
         - deploy
       become: yes
       become_user: tomcat
       become_method: sudo

请如果有人可以建议。任何帮助表示赞赏

标签： ansibleansible-inventory

Answer 1

Q：“在3个节点上部署并测试。如果测试成功，再去剩下的3个节点。” （使用 group_vars prod .yml / preprod .yml）

A ：Makeprod_1和.prod_2 _ 例如prod

shell> cat hosts
[prod_1]
prod-1-myapp
prod-2-myapp
prod-3-myapp

[prod_2]
prod-4-myapp
prod-5-myapp
prod-6-myapp

[prod:children]
prod_1
prod_2

[preprod]
preprod-cn-p1

然后部署组prod_1。如果一切正常，请部署prod_2。例如，下面的剧本

shell> cat playbook.yml
- import_playbook: myapp-main.yml
  vars:
    target_env: prod_1

- hosts: localhost
  gather_facts: false
  tasks:
    - fail:
        msg: Test prod_1 failed
      when: prod_1_failed|default(false)|bool

- import_playbook: myapp-main.yml
  vars:
    target_env: prod_2

shell> cat myapp-main.yml
- hosts: '{{ target_env }}'
  gather_facts: false
  tasks:
    - debug:
        msg: "Deploy {{ inventory_hostname }}"

给

PLAY [prod_1] ****

TASK [debug] ****
ok: [prod-2-myapp] => {
    "msg": "Deploy prod-2-myapp"
}
ok: [prod-1-myapp] => {
    "msg": "Deploy prod-1-myapp"
}
ok: [prod-3-myapp] => {
    "msg": "Deploy prod-3-myapp"
}

PLAY [localhost] ****

TASK [fail] ****
skipping: [localhost]

PLAY [prod_2] ****

TASK [debug] ****
ok: [prod-4-myapp] => {
    "msg": "Deploy prod-4-myapp"
}
ok: [prod-5-myapp] => {
    "msg": "Deploy prod-5-myapp"
}
ok: [prod-6-myapp] => {
    "msg": "Deploy prod-6-myapp"
}

---

失败prod_2时不应部署该组。prod_1测试一下。例如

shell> ansible-playbook -i hosts playbook.yml -e "prod_1_failed=True"

给

PLAY [prod_1] ****

  ...

PLAY [localhost] ****

TASK [fail] ****
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Test prod_1 failed"}

  ...