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| author | Mark Goddard <mark@stackhpc.com> | 2020-07-08 19:22:29 +0100 |
|---|---|---|
| committer | Bartosz Bezak <bartosz@stackhpc.com> | 2025-09-09 15:18:59 +0200 |
| commit | dba99ea974ccfa59c8701a64731ae3b72a226122 (patch) | |
| tree | 030b776386a29fbb73f72766f641ed605bc16e04 /ansible/site.yml | |
| parent | 0e6bab76fe1b3e47e21295c5a23a8008e395b8de (diff) | |
| download | kolla-ansible-dba99ea974ccfa59c8701a64731ae3b72a226122.tar.gz kolla-ansible-dba99ea974ccfa59c8701a64731ae3b72a226122.zip | |
Performance: Split out prometheus node exporter and cadvisor
Executing tasks has a performance penalty, even if they are skipped [1].
The prometheus role deploys a few types of services:
* core prometheus server and alert manager services
* centralised service-based exporters (mysql, memcached, OpenStack,
etc.)
* distributed node-based exporters (node exporter, cadvisor) that are
deployed to all hosts
There is a significant overhead in executing the tasks associated with
the core services and centralised exporters against all hosts, even
though they are skipped.
This change extracts the node exporter and cadvisor deployment into a
new prometheus-node-exporters role, to avoid executing the prometheus
role against all hosts. The new role is lightweight, and has a small
number of tasks, which should significantly improve performance.
[1]
https://github.com/stackhpc/ansible-scaling/blob/master/doc/skip.md
Partially-Implements: blueprint performance-improvements
Change-Id: I6913756ff85b7cc626d50ce16d55085d3683db17
Signed-off-by: Bartosz Bezak <bartosz@stackhpc.com>
Diffstat (limited to 'ansible/site.yml')
| -rw-r--r-- | ansible/site.yml | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/ansible/site.yml b/ansible/site.yml index 6c8755e80..1f6f409d6 100644 --- a/ansible/site.yml +++ b/ansible/site.yml @@ -440,10 +440,8 @@ gather_facts: false hosts: - prometheus - - prometheus-node-exporter - prometheus-mysqld-exporter - prometheus-memcached-exporter - - prometheus-cadvisor - prometheus-alertmanager - prometheus-openstack-exporter - prometheus-elasticsearch-exporter @@ -459,6 +457,22 @@ - { role: prometheus, tags: prometheus } +- name: Apply role prometheus-node-exporters + gather_facts: false + hosts: + - prometheus-node-exporter + - prometheus-cadvisor + - '&enable_prometheus_True' + serial: '{{ kolla_serial|default("0") }}' + max_fail_percentage: >- + {{ prometheus_node_exporters_max_fail_percentage | + default(kolla_max_fail_percentage) | + default(100) }} + roles: + - { role: prometheus-node-exporters, + tags: [prometheus, prometheus-node-exporters], + when: enable_prometheus | bool } + - name: Apply role iscsi gather_facts: false hosts: |