Is there a better forum for questions like this? I spent a fair amount of
time reading and googling before posting. I am really curious how to
optimize tasks like this. Where shoudl I post this?
On Wednesday, April 19, 2017 at 5:46:12 PM UTC-4, Michael Bubb wrote:
>
>
> Hello -
>
> We have apps that use haproxy as a lb for http/https and we use 8 haproxy
> sockets. Below I have included a playbook extract and a sample run where I
> take a single server in and out of the lbs. In this example the server is
> behind 2 lbs and has 2 backends. So when I run the haproxy module play to
> enable or disable the server there are 32 subtasks (see below).
>
> I am wondering if there is a faster way of doing this.
>
> I have pipelining=True in the ansible.cfg.
>
> This example is relatively simple - I have other configs with 4 backends
> and 6 lbs so the deploys can get a bit bogged down.
>
>
> thank you
>
>
> Michael
>
>
> playbook extract
>
> ---
> - name: put loadbalanced servers in and out of maintenance
> hosts: all
> remote_user: ansible_user
> become: yes
> roles:
> - baseinstall
> # - "{{ app_role }}"
> serial: "25%"
> # accelerate: True # this is deprecated
>
> vars:
> disable_app: False
> enable_app: False
>
>
>
> tasks:
> - name: set pre-timestamp
> set_fact:
> pretimestamp: "{{ lookup('pipe', 'date +%Y%m%d-%T') }}"
>
> - name: show hostname and prestamp
> debug:
> msg: "{{pretimestamp}} - {{ansible_hostname}}"
>
> - block:
> - name: disable server in lb
> haproxy: 'state=disabled host="{{ ansible_hostname }}" backend={{
> item[1] }} socket={{item[2]}}'
> delegate_to: "{{ item[0] }}"
> with_nested:
> - "{{loadbalancer_group}}"
> - "{{lbbackends}}"
> - "{{haproxysocks}}"
> when: loadbalanced and disable_app
>
>
> - block:
> - name: enable server in lb
> haproxy: 'state=enabled host="{{ ansible_hostname }}" backend={{
> item[1] }} socket={{item[2]}}'
> delegate_to: "{{ item[0] }}"
> with_nested:
> - "{{loadbalancer_group}}"
> - "{{lbbackends}}"
> - "{{haproxysocks}}"
> when: loadbalanced and enable_app
>
> - name: set post-timestamp
> set_fact:
> posttimestamp: "{{ lookup('pipe', 'date +%Y%m%d-%T') }}"
>
> - name: show stats
> debug:
> msg: "{{pretimestamp}} - {{posttimestamp}}"
>
>
> <https://gist.github.com/mbubb/dbc978de70df801c5666739fbd676614#output>output
> extract (not showing enable play)
>
>
>
> ### ansible-playbook /etc/ansible/ansible-modules/lb_app_maint.yml -s -e
> "loadbalanced=True" -e "disable_app=True" -e "enable_app=True" -l
> web-sin-1.example.com
>
> PLAY [put loadbalanced servers in and out of maintenance]
> *********************************************************************************************************************************************************
>
> ...
>
>
> TASK [disable server in lb]
> ***************************************************************************************************************************************************************************************
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock1'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock2'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock3'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock4'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock5'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock6'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock7'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapp', u'/var/run/haproxysock8'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock1'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock2'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock3'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock4'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock5'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock6'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock7'])
> changed: [web-sin-1.example.com -> 10.64.141.111] =>
> (item=[u'lb-sin-1.example.com', u'myapphttps', u'/var/run/haproxysock8'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock1'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock2'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock3'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock4'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock5'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock6'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock7'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapp', u'/var/run/haproxysock8'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock1'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock2'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock3'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock4'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock5'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock6'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock7'])
> changed: [web-sin-1.example.com -> 10.64.141.107] =>
> (item=[u'lb-sin-2.example.com', u'myapphttps', u'/var/run/haproxysock8'])
>
> TASK [show stats]
> *************************************************************************************************************************************************************************************************
> ok: [web-sin-1.example.com ] => {
> "changed": false,
> "msg": "20170419-16:38:46 - 20170419-16:39:28"
> }
>
>
> PLAY RECAP
> ********************************************************************************************************************************************************************************************************web-sin-1.example.com
> : ok=7 changed=2 unreachable=0 failed=0
>
>
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