yes,I want only get one host in member of group ‘master’，how to write it ?
[root@localhost ~]# cat /etc/ansible/hosts
[master]
47.108.222.84
47.108.234.26
47.108.213.148
only use "47.108.222.84" to do shell command
在2021年1月20日星期三 UTC+8 下午3:47:31<jyle...@gmail.com> 写道：
> I'm wrong.... it's not hostvars['master'], because master is not the name
> of your first host in group master
>
>
> Le 20/01/2021 à 08:33, Jean-Yves LENHOF a écrit :
>
> You're looking for something like this I think (not tested) :
>
> - name: add master node
> shell: "kubeadm join {{ groups['master']|first }}:6443 --token
> {{hostvars['master']['kubeadm_token'].stdout}}
> --discovery-token-ca-cert-hash
> sha256:{{hostvars['master']['kubeadm_hash'].stdout}} --control-plane"
> when: inventory_hostname != groups['master']|first
>
> Please be careful using special hostvars variable, there's no control in
> this array if the variable exist, etc... so use with caution
>
> Regards,
>
> JYL
>
> Le 20/01/2021 à 08:17, liyo...@126.com a écrit :
>
> I know，but I want get the token in A host，use it in other hosts，how to do
> it ?
>
> 在2021年1月20日星期三 UTC+8 下午2:31:36<dick....@geant.org> 写道：
>
>> Hii
>>
>> You're registering a variable for one host (47.108.222.84) but then try
>> to use it for another (47.108.213.148).
>>
>> I'm have no experience with kubeadm but I think your logic wrt host
>> selection should be improved, so that you can reliably pick the variable
>> from a stable group name, instead of "the last item".
>>
>>
>> On Wed, 20 Jan 2021 at 05:26, liyo...@126.com <liyo...@126.com> wrote:
>>
>>> when I edit a playbook test.yml:
>>>
>>> ---
>>> - hosts: master
>>> gather_facts: no
>>> tasks:
>>> - name: register hash
>>> shell: "openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt |
>>> openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex |
>>> sed 's/^ .* //'|cut -d' ' -f 2"
>>> register: kubeadm_hash
>>> when: inventory_hostname == groups['master']|first
>>>
>>> - name: display hash
>>> debug: msg="{{kubeadm_hash.stdout}}"
>>> when: inventory_hostname == groups['master']|first
>>>
>>> - name: register token
>>> shell: kubeadm token list |grep forever|awk '{print $1}'
>>> register: kubeadm_token
>>> when: inventory_hostname == groups['master']|first
>>>
>>> - name: display token
>>> debug: msg="{{kubeadm_token.stdout}}"
>>> when: inventory_hostname == groups['master']|first
>>>
>>> - name: add master node
>>> shell: "kubeadm join {{ groups['master'][0] }}:6443 --token
>>> {{kubeadm_token.stdout}} --discovery-token-ca-cert-hash
>>> sha256:{{kubeadm_hash.stdout}} --control-plane"
>>> when: inventory_hostname != groups['master']|first
>>>
>>>
>>> the results is below:
>>> PLAY [master]
>>> ***************************************************************************************************************************************************************
>>>
>>> TASK [register hash]
>>> ********************************************************************************************************************************************************
>>> skipping: [47.108.234.26]
>>> skipping: [47.108.213.148]
>>> changed: [47.108.222.84]
>>>
>>> TASK [display hash]
>>> *********************************************************************************************************************************************************
>>> ok: [47.108.222.84] => {
>>> "msg":
>>> "af040f8e06e320e264a79f62b677b3267f4b681d869408658bdd121fa568216c"
>>> }
>>> skipping: [47.108.213.148]
>>> skipping: [47.108.234.26]
>>>
>>> TASK [register token]
>>> *******************************************************************************************************************************************************
>>> skipping: [47.108.234.26]
>>> skipping: [47.108.213.148]
>>> changed: [47.108.222.84]
>>>
>>> TASK [display token]
>>> ********************************************************************************************************************************************************
>>> ok: [47.108.222.84] => {
>>> "msg": "otnb1h.cvagwwe7tgdvzbtx"
>>> }
>>> skipping: [47.108.234.26]
>>> skipping: [47.108.213.148]
>>>
>>> TASK [add master node]
>>> ******************************************************************************************************************************************************
>>> skipping: [47.108.222.84]
>>> fatal: [47.108.234.26]: FAILED! => {"msg": "The task includes an option
>>> with an undefined variable. The error was: 'dict object' has no attribute
>>> 'stdout'\n\nThe error appears to be in '/root/test.yml': line 23, column 7,
>>> but may\nbe elsewhere in the file depending on the exact syntax
>>> problem.\n\nThe offending line appears to be:\n\n\n - name: add master
>>> node\n ^ here\n"}
>>> fatal: [47.108.213.148]: FAILED! => {"msg": "The task includes an option
>>> with an undefined variable. The error was: 'dict object' has no attribute
>>> 'stdout'\n\nThe error appears to be in '/root/test.yml': line 23, column 7,
>>> but may\nbe elsewhere in the file depending on the exact syntax
>>> problem.\n\nThe offending line appears to be:\n\n\n - name: add master
>>> node\n ^ here\n"}
>>>
>>> PLAY RECAP
>>> ******************************************************************************************************************************************************************
>>> 47.108.213.148 : ok=0 changed=0 unreachable=0
>>> failed=1 skipped=4 rescued=0 ignored=0
>>> 47.108.222.84 : ok=4 changed=2 unreachable=0
>>> failed=0 skipped=1 rescued=0 ignored=0
>>> 47.108.234.26 : ok=0 changed=0 unreachable=0
>>> failed=1 skipped=4 rescued=0 ignored=0
>>>
>>> how to use it ?
>>>
>>> --
>>> You received this message because you are subscribed to the Google
>>> Groups "Ansible Project" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to ansible-proje...@googlegroups.com.
>>> To view this discussion on the web visit
>>> https://groups.google.com/d/msgid/ansible-project/21ca354e-a0ed-4d10-9d01-8f48f170d22cn%40googlegroups.com
>>>
>>> <https://groups.google.com/d/msgid/ansible-project/21ca354e-a0ed-4d10-9d01-8f48f170d22cn%40googlegroups.com?utm_medium=email&utm_source=footer>
>>> .
>>>
>> --
>> Sent from a mobile device - please excuse the brevity, spelling and
>> punctuation.
>>
> --
> You received this message because you are subscribed to the Google Groups
> "Ansible Project" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to ansible-proje...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/ansible-project/647f4749-f97f-4522-a368-c95a25878790n%40googlegroups.com
>
> <https://groups.google.com/d/msgid/ansible-project/647f4749-f97f-4522-a368-c95a25878790n%40googlegroups.com?utm_medium=email&utm_source=footer>
> .
>
> --
> You received this message because you are subscribed to the Google Groups
> "Ansible Project" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to ansible-proje...@googlegroups.com.
>
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/ansible-project/1ed8d8ac-3d8b-29cd-576b-a26fecb91ed7%40lenhof.eu.org
>
> <https://groups.google.com/d/msgid/ansible-project/1ed8d8ac-3d8b-29cd-576b-a26fecb91ed7%40lenhof.eu.org?utm_medium=email&utm_source=footer>
> .
>
>
--
You received this message because you are subscribed to the Google Groups
"Ansible Project" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to ansible-project+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/ansible-project/98e9e1c7-51dc-4e79-9128-c47370b1a665n%40googlegroups.com.
