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prometheus: only install different version, unless forced

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This commit is contained in:
Matt Layher 2017-08-22 10:47:26 -04:00
parent 446cce3960
commit d8a0df811f
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2 changed files with 34 additions and 2 deletions
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33
roles/prometheus/tasks/main.yml
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@ -1,7 +1,21 @@
--- ---
- name: check if installing a different version of prometheus
tags:
- prometheus
shell: "cat {{ prometheus_config }}/.sha256"
ignore_errors: yes
register: checksum
- name: determine if prometheus {{ prometheus_version}} should be installed
tags:
- prometheus
set_fact:
prometheus_install: (checksum.stdout.find(prometheus_sha256) == -1) or (prometheus_force is defined)
- name: download and checksum prometheus {{ prometheus_version }} tarball - name: download and checksum prometheus {{ prometheus_version }} tarball
tags: tags:
- prometheus - prometheus
when: prometheus_install
get_url: get_url:
url: "{{ prometheus_url }}" url: "{{ prometheus_url }}"
dest: "{{ prometheus_tgz }}" dest: "{{ prometheus_tgz }}"
@ -10,6 +24,7 @@
- name: unpack prometheus tarball - name: unpack prometheus tarball
tags: tags:
- prometheus - prometheus
when: prometheus_install
unarchive: unarchive:
src: "{{ prometheus_tgz }}" src: "{{ prometheus_tgz }}"
dest: "/tmp/" dest: "/tmp/"
@ -18,6 +33,7 @@
- name: create prometheus user - name: create prometheus user
tags: tags:
- prometheus - prometheus
when: prometheus_install
user: user:
name: prometheus name: prometheus
shell: "/bin/false" shell: "/bin/false"
@ -28,12 +44,12 @@
- prometheus - prometheus
stat: stat:
path: "/etc/systemd/system/prometheus.service" path: "/etc/systemd/system/prometheus.service"
register: checked register: svccheck
- name: stop prometheus service if it exists - name: stop prometheus service if it exists
tags: tags:
- prometheus - prometheus
when: checked.stat.exists when: svccheck.stat.exists
service: service:
name: prometheus name: prometheus
state: stopped state: stopped
@ -41,6 +57,7 @@
- name: copy prometheus binaries to /usr/local/bin - name: copy prometheus binaries to /usr/local/bin
tags: tags:
- prometheus - prometheus
when: prometheus_install
command: "cp {{ prometheus_tmp }}/{{ item }} /usr/local/bin/" command: "cp {{ prometheus_tmp }}/{{ item }} /usr/local/bin/"
with_items: with_items:
- "prometheus" - "prometheus"
@ -49,6 +66,7 @@
- name: set permissions on prometheus binaries - name: set permissions on prometheus binaries
tags: tags:
- prometheus - prometheus
when: prometheus_install
file: file:
path: "/usr/local/bin/{{ item }}" path: "/usr/local/bin/{{ item }}"
owner: prometheus owner: prometheus
@ -61,6 +79,7 @@
- name: create prometheus config directory - name: create prometheus config directory
tags: tags:
- prometheus - prometheus
when: prometheus_install
file: file:
path: "{{ prometheus_config }}" path: "{{ prometheus_config }}"
state: directory state: directory
@ -86,6 +105,7 @@
- name: create prometheus data directory - name: create prometheus data directory
tags: tags:
- prometheus - prometheus
when: prometheus_install
file: file:
path: "{{ prometheus_data }}" path: "{{ prometheus_data }}"
state: directory state: directory
@ -116,9 +136,18 @@
- name: remove temporary prometheus files - name: remove temporary prometheus files
tags: tags:
- prometheus - prometheus
when: prometheus_install
file: file:
path: "{{ item }}" path: "{{ item }}"
state: absent state: absent
with_items: with_items:
- "{{ prometheus_tmp }}" - "{{ prometheus_tmp }}"
- "{{ prometheus_tgz }}" - "{{ prometheus_tgz }}"
- name: create checksum file for prometheus {{ prometheus_version }}
tags:
- prometheus
when: prometheus_install
template:
src: sha256.j2
dest: "{{ prometheus_config }}/.sha256"

3
roles/prometheus/templates/sha256.j2 Normal file
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@ -0,0 +1,3 @@
# {{ ansible_managed }}
# Remove this file to force ansible to reinstall prometheus {{ prometheus_version }}.
{{ prometheus_sha256 }}