Use upstream v0.8.0

defaults/main.yml

@@ -1 +1,3 @@
 postgres_exporter_web_listen_address: ":9113"
+postgres_exporter_version: "0.8.0"
+postgres_exporter_version_checksum: "sha256:272ed14d3c360579d6e231db34a568ec08f61d2e163cf111e713929ffb6db3f5"

tasks/main.yml

@@ -1,63 +1,46 @@
 ---
-- name: Ensure dependencies installed
- apt: 
- name: 
- - git
- - make
- - golang
- state: present
-
 - name: Create user
  user:
  name: postgres
  state: present
  create_home: no
 
-- name: Make directory
+- name: Make directories
  file:
- path: /opt/postgres_exporter
+ path: "{{ item }}"
  state: directory
  owner: postgres
  group: postgres
+ loop:
+ - "/opt/postgres_exporter"
+ - "/opt/postgres_exporter/tarballs"
+ - "/opt/postgres_exporter/bin"
 
-- name: Make src directory
- file:
- path: /opt/postgres_exporter/src
- state: directory
+- name: Get postgres_exporter from github
+ get_url:
+ url: https://github.com/wrouesnel/postgres_exporter/releases/download/v{{ postgres_exporter_version }}/postgres_exporter_v{{ postgres_exporter_version }}_linux-amd64.tar.gz
+ dest: /opt/postgres_exporter/tarballs/postgres_exporter-{{ postgres_exporter_version }}.linux-amd64.tar.gz
  owner: postgres
  group: postgres
+ checksum: "{{ postgres_exporter_version_checksum }}"
 
-
-- name: checkout postgres_exporter
- git:
- repo: https://github.com/matrix-org/postgres_exporter.git
- dest: /opt/postgres_exporter/src/postgres_exporter
- version: matrix.org
- become: true
- become_user: postgres
- vars:
- ansible_ssh_pipelining: true
-
-- name: Go Get (?)
- command: go get
- args:
- chdir: /opt/postgres_exporter/src/postgres_exporter/
- environment:
- GOPATH: /opt/postgres_exporter/
-
-- name: Build
- make:
- chdir: /opt/postgres_exporter/src/postgres_exporter/
- target: binary
- environment:
- GOPATH: /opt/postgres_exporter/
+- name: Unpack postgres_exporter into location
+ unarchive:
+ src: /opt/postgres_exporter/tarballs/postgres_exporter-{{ postgres_exporter_version }}.linux-amd64.tar.gz
+ dest: /opt/postgres_exporter/bin/
+ owner: postgres
+ group: postgres
+ remote_src: yes
+ notify:
+ - "restart postgres_exporter"
 
 - name: Template queries.yaml
  template:
  src: queries.yaml.j2
  dest: /opt/postgres_exporter/queries.yaml
  owner: postgres
  group: postgres
+ mode: "u=rw,g=r,o=r"
  notify:
  - "restart postgres_exporter"
 
@@ -66,6 +49,8 @@
  src: postgres_exporter.service.j2
  dest: /etc/systemd/system/postgres_exporter.service
  owner: root
+ group: root
+ mode: "u=rw,g=r,o=r"
  notify:
  - "reload systemd"
  - "restart postgres_exporter"

templates/postgres_exporter.service.j2

@@ -5,7 +5,7 @@ Description="Prometheus Postgres Exporter (postgres_exporter)"
 Type=simple
 WorkingDirectory=/opt/postgres_exporter
 # and the award for the most uses of the name of the app in a single commandline goes to:
-ExecStart=/opt/postgres_exporter/src/postgres_exporter/postgres_exporter --web.listen-address={{ postgres_exporter_web_listen_address }} --extend.query-path="/opt/postgres_exporter/queries.yaml"
+ExecStart=/opt/postgres_exporter/bin/postgres_exporter_v{{ postgres_exporter_version}}_linux-amd64/postgres_exporter --web.listen-address={{ postgres_exporter_web_listen_address }} --extend.query-path="/opt/postgres_exporter/queries.yaml"
 User=postgres
 Group=postgres
 Restart=always

templates/queries.yaml.j2

@@ -215,6 +215,86 @@ pg_statio_all_tables:
  usage: "COUNTER"
  description: "Number of buffer hits in this table's TOAST table indexes (if any)"
 
+# Port of https://github.com/matrix-org/postgres_exporter/commit/f77ce1952e8bdb75b3d36d3be0c604c241f907e6
+pg_stat_all_tables:
+ query: |
+ SELECT relid, schemaname, relname, seq_scan,
+ seq_tup_read, idx_scan, idx_tup_fetch,
+ n_tup_ins, n_tup_upd, n_tup_del,
+ n_tup_hot_upd, n_live_tup, n_dead_tup,
+ n_mod_since_analyze, last_vacuum,
+ last_autovacuum, last_analyze,
+ last_autoanalyze, vacuum_count,
+ autovacuum_count, analyze_count,
+ autoanalyze_count
+ FROM pg_stat_all_tables;
+ metrics:
+ - relid:
+ usage: "LABEL"
+ description: "OID of a table"
+ - schemaname:
+ usage: "LABEL"
+ description: "Name of the schema that this table is in"
+ - relname:
+ usage: "LABEL"
+ description: "Name of this table"
+ - seq_scan:
+ usage: "COUNTER"
+ description: "Number of sequential scans initiated on this table"
+ - seq_tup_read:
+ usage: "COUNTER"
+ description: "Number of live rows fetched by sequential scans"
+ - idx_scan:
+ usage: "COUNTER"
+ description: "Number of index scans initiated on this table"
+ - idx_tup_fetch:
+ usage: "COUNTER"
+ description: "Number of live rows fetched by index scans"
+ - n_tup_ins:
+ usage: "COUNTER"
+ description: "Number of rows inserted"
+ - n_tup_upd:
+ usage: "COUNTER"
+ description: "Number of rows updated"
+ - n_tup_del:
+ usage: "COUNTER"
+ description: "Number of rows deleted"
+ - n_tup_hot_upd:
+ usage: "COUNTER"
+ description: "Number of rows HOT updated (i.e., with no separate index update required)"
+ - n_live_tup:
+ usage: "GAUGE"
+ description: "Estimated number of live rows"
+ - n_dead_tup:
+ usage: "GAUGE"
+ description: "Estimated number of dead rows"
+ - n_mod_since_analyze:
+ usage: "GAUGE"
+ description: "Estimated number of rows modified since this table was last analyzed"
+ - last_vacuum:
+ usage: "COUNTER"
+ description: "Last time at which this table was manually vacuumed (not counting VACUUM FULL)"
+ - last_autovacuum:
+ usage: "COUNTER"
+ description: "Last time at which this table was vacuumed by the autovacuum daemon"
+ - last_analyze:
+ usage: "COUNTER"
+ description: "Last time at which this table was manually analyzed"
+ - last_autoanalyze:
+ usage: "COUNTER"
+ description: "Last time at which this table was analyzed by the autovacuum daemon"
+ - vacuum_count:
+ usage: "COUNTER"
+ description: "Number of times this table has been manually vacuumed (not counting VACUUM FULL)"
+ - autovacuum_count:
+ usage: "COUNTER"
+ description: "Number of times this table has been vacuumed by the autovacuum daemon"
+ - analyze_count:
+ usage: "COUNTER"
+ description: "Number of times this table has been manually analyzed"
+ - autoanalyze_count:
+ usage: "COUNTER"
+ description: "Number of times this table has been analyzed by the autovacuum daemon"
 
 # c.f. https://www.postgresql.org/docs/10/pgstatstatements.html
 pg_stat_statements:

vagrant-test.yml

@@ -2,3 +2,5 @@
  roles:
  - role: ansible-postgres_exporter
  become: true
+ vars:
+ postgres_exporter_data_source_name: "host=/tmp dbname=postgres"