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Improve robustness of postgresql 9.6 -> 11 migration (in particular dropcluster in case cluster 11 doesn't exists yet)

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This commit is contained in:
Alexandre Aubin 2020-08-12 17:12:21 +02:00
parent accc2da4e3
commit 59bd7d6664
1 changed files with 8 additions and 1 deletions
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9
src/yunohost/data_migrations/0017_postgresql_9p6_to_11.py
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@ -25,11 +25,18 @@ class MyMigration(Migration):
if not self.package_is_installed("postgresql-11"):
raise YunohostError("migration_0017_postgresql_11_not_installed")
# Make sure there's a 9.6 cluster
try:
self.runcmd("pg_lsclusters | grep -q '^9.6 '")
except Exception as e:
logger.warning("It looks like there's not active 9.6 cluster, so probably don't need to run this migration")
return
if not space_used_by_directory("/var/lib/postgresql/9.6") > free_space_in_directory("/var/lib/postgresql"):
raise YunohostError("migration_0017_not_enough_space", path="/var/lib/postgresql/")
self.runcmd("systemctl stop postgresql")
self.runcmd("pg_dropcluster --stop 11 main")
self.runcmd("pg_dropcluster --stop 11 main || true") # We do not trigger an exception if the command fails because that probably means cluster 11 doesn't exists, which is fine because it's created during the pg_upgradecluster)
self.runcmd("pg_upgradecluster -m upgrade 9.6 main")
self.runcmd("pg_dropcluster --stop 9.6 main")
self.runcmd("systemctl start postgresql")