pg_basebackup ERROR: could not signal for checkpoint: Permission denied

[masoudkavehie]

i deployed postgres cluster in kubernetes the master node start without any issue but when replication node wants to start checkpoints it gets this error

pg_basebackup: error: could not initiate base backup: ERROR: could not signal for checkpoint: Permission denied

pg_basebackup: error: could not initiate base backup: ERROR: could not signal for checkpoint: Permission denied
pg_basebackup: removing data directory "/pgdata/pg17"
pg_basebackup: removing WAL directory "/pgdata/pg17_wal"
2025-12-04 10:48:59,813 ERROR: Error when fetching backup: pg_basebackup exited with code=1

i cant find this permission denied is coming from where ?? i checked all permissions and security contexts

[masoudkavehie]

i found it . it was related to app armor in my host .i disabled it and it works for me