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Make Telegraf Postgres templates idempotent

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Use CREATE TABLE IF NOT EXISTS and a WHERE-guarded create_parent() so
a Telegraf restart can re-run the templates safely after manual DB
surgery. Add an explicit tag_table_create_templates mirroring the
plugin default with IF NOT EXISTS for the same reason.
This commit is contained in:
Mike Reeves
2026-04-17 15:43:50 -04:00
parent 21076af01e
commit 31383bd9d0
1 changed files with 7 additions and 2 deletions
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salt/telegraf/etc/telegraf.conf
+7 -2
View File
@@ -114,10 +114,15 @@
# ALTER it before create_parent(). And create_parent() splits
# p_parent_table on '.' to look up raw identifiers, so the literal must
# be 'schema.name' (not '"schema"."name"' as .table|quoteLiteral emits).
# IF NOT EXISTS keeps the three templates idempotent so a Telegraf
# restart after any DB-side surgery re-runs them safely.
create_templates = [
'''CREATE TABLE {{ .table }} ({{ .columns }}) PARTITION BY RANGE ("time")''',
'''CREATE TABLE IF NOT EXISTS {{ .table }} ({{ .columns }}) PARTITION BY RANGE ("time")''',
'''ALTER TABLE {{ .table }} ALTER COLUMN "time" SET NOT NULL''',
'''SELECT partman.create_parent(p_parent_table := {{ printf "%s.%s" .table.Schema .table.Name | quoteLiteral }}, p_control := 'time', p_type := 'range', p_interval := '1 day', p_premake := 3)'''
'''SELECT partman.create_parent(p_parent_table := {{ printf "%s.%s" .table.Schema .table.Name | quoteLiteral }}, p_control := 'time', p_type := 'range', p_interval := '1 day', p_premake := 3) WHERE NOT EXISTS (SELECT 1 FROM partman.part_config WHERE parent_table = {{ printf "%s.%s" .table.Schema .table.Name | quoteLiteral }})'''
]
tag_table_create_templates = [
'''CREATE TABLE IF NOT EXISTS {{ .table }} ({{ .columns }}, PRIMARY KEY (tag_id))'''
]
{% endraw %}
{%- endif %}