You could try something
hostvars[groups['master']|first] instead of hostvars['master'] in my
proposition to see it that works...not sure
Use a debug module could help
Regards,
JYL
Le 20/01/2021 à 08:53, liyo...@126.com a écrit :
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 ?
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