我正在尝试使用 Ansible Playbook 更新我们的 RHEL7 机器,如果内核已更新,则会自动重新启动机器。
这就是我想出的:
---
- hosts: server1
become: yes
tasks:
- name: YUM Update
yum:
name: "*"
state: latest
register: yum_updates
- debug:
var: yum_updates.changes.updated
- name: Reboot server1
reboot:
when: '"kernel" in yum_updates.changes.updated'
...
当然,到目前为止更新有效,但我找不到一种按照我需要的方式评估输出变量的方法。这就是输出:
PLAY [server1] *********************************************************************************************************************************************************************************
TASK [Gathering Facts] *********************************************************************************************************************************************************************************
ok: [server1]
TASK [YUM Update] **************************************************************************************************************************************************************************************
changed: [server1]
TASK [debug] *******************************************************************************************************************************************************************************************
ok: [de-agb1-smba01t] => {
"yum_updates.changes.updated": [
[
"kernel-headers",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"kernel",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"sudo",
"1.8.23-4.el7_7.1.x86_64 from rhel-7-server-rpms"
],
[
"bpftool",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"python-perf",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"kernel-tools-libs",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"kernel-devel",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"microcode_ctl",
"2:2.1-53.3.el7_7.x86_64 from rhel-7-server-rpms"
],
[
"SDL",
"1.2.15-14.el7_7.x86_64 from rhel-7-server-rpms"
],
[
"kernel-tools",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
],
[
"perf",
"3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
]
]
}
TASK [Reboot server1] **************************************************************************************************************************************************************************************
skipping: [server1]
PLAY RECAP *********************************************************************************************************************************************************************************************
server1 : ok=3 changed=1 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
当条件看起来如何时,它会找到单词“kernel”?
任何想法?
答案1
使用展平过滤器,如接受的答案所示https://unix.stackexchange.com/a/554727/307127将包名称和版本混合到一个列表中。尽管这不太可能引起任何问题,但它并没有达到应有的干净程度。
相反,您可以将重新启动的测试编写为
when: dict((yum_updates.changes|default(dict())).updated|default([])).kernel is defined
这会将已更改的包和版本的列表转换为字典(以包名称作为键,版本作为值),然后测试字典是否包含键“kernel”。请注意,在两个地方使用“默认”过滤器来覆盖边缘情况,例如没有更新包时。这是必要的,因为当没有更新任何包时,注册变量中不存在“changes”键(即“yum_updates.changes”不存在)。
答案2
答案3
您有一个列表 ( yum.updates.changes.updated
),其中每一项都是两个项目的列表(软件包名称和版本)。仅匹配软件包的简单 when 条件kernel
如下所示:
---
- debug:
msg: "{{ item.0 }} was updated to version {{ item.1 }}"
when: item.0 == "kernel"
loop: "{{ yum_updates.changes.updated }}"
根据您的示例数据,此任务将输出:
TASK [debug] *****************************************************************************************************************************************************************
skipping: [localhost] => (item=['kernel-headers', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])
ok: [localhost] => (item=['kernel', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms']) => {
"msg": "kernel was updated to version 3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms"
}
skipping: [localhost] => (item=['sudo', '1.8.23-4.el7_7.1.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['bpftool', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['python-perf', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['kernel-tools-libs', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['kernel-devel', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['microcode_ctl', '2:2.1-53.3.el7_7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['SDL', '1.2.15-14.el7_7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['kernel-tools', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])
skipping: [localhost] => (item=['perf', '3.10.0-1062.4.3.el7.x86_64 from rhel-7-server-rpms'])