mirror/matrix-docker-ansible-deploy
1
0
Fork 0
mirror of https://github.com/spantaleev/matrix-docker-ansible-deploy.git synced 2024-12-24 18:08:28 +01:00
Code Issues Packages Projects Releases Wiki Activity

Fix dump importing (backup restore) into Postgres v14

Browse Source 
In short, the problem is that older Postgres versions store passwords
hashed as md5. When you dump such a database, the dump naturally also
contains md5-hashed passwords.
Restoring from that dump used to create users and updates their passwords
with these md5 hashes.
However, Postgres v14 prefers does not like md5-hashed passwords now (by default),
which breaks connectivity. Postgres v14 prefers `scram-sha-256` for
authentication.

Our solution is to just ignore setting passwords (`ALTER ROLE ..`
statements) when restoring dumps. We don't need to set passwords as
defined in the dump anyway, because the playbook creates users
and manages their passwords by itself.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1340
This commit is contained in:
Slavi Pantaleev 2021-10-21 16:32:05 +03:00
parent 35c91701a8
commit 09ac950d17
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
roles/matrix-postgres/defaults/main.yml
View File

@ -63,7 +63,16 @@ matrix_postgres_additional_databases: []
# We either need to not create them or to ignore the `CREATE ROLE` statements in the dump.
matrix_postgres_import_roles_to_ignore: [matrix_postgres_connection_username]
matrix_postgres_import_roles_ignore_regex: "^CREATE ROLE ({{ matrix_postgres_import_roles_to_ignore|join('|') }});"
# When importing an existing Postgres database (when restoring a backup) or when doing a Postgres upgrade (which dumps & restores), we'd like to avoid:
# - creating users (`CREATE ROLE ..`)
# - updating passwords for users (`ALTER ROLE matrix WITH SUPERUSER INHERIT NOCREATEROLE NOCREATEDB LOGIN NOREPLICATION NOBYPASSRLS PASSWORD 'md5...`)
#
# Both of these operations are done by the playbook anyway.
# Updating passwords is especially undesirable, because older versions hash passwords using md5 and export them as md5 hashes in the dump file,
# which is unsupported by default by newer Postgres versions (v14+).
# When users are created and passwords are set by the playbook, they end up hashed as `scram-sha-256` on Postgres v14+.
# If an md5-hashed password is restored on top, Postgres v14+ will refuse to authenticate users with it by default.
matrix_postgres_import_roles_ignore_regex: "^(CREATE|ALTER) ROLE ({{ matrix_postgres_import_roles_to_ignore|join('|') }})(;| WITH)"
# A list of databases to avoid creating when importing (or upgrading) the database.
# If a dump file contains the databases and they've also been created beforehand (see `matrix_postgres_additional_databases`),