Failed to start SLAPD and B&R operation failed in ansible

[Kirti Singh]

Ldap conf is pointing to itself as the provider in sync-replication directive hence the restore is failing.

Getting the below error while executing ansible playbook for restore.
stdout: 'Starting SLAPD: Failed to start SLAPD.

[John Kung (john-kung)]

Appending to Bug Description (from review) https://review.opendev.org/c/starlingx/ansible-playbooks/+/882116

"In a Duplex system when backup is taken from
controller-1 and performed restore on controller-0, the
restore fails due to SLAPD failure.

SLAPD fails to start because, the backup file
/etc/ldap/schema/cn=config/olcDatabase={1}mdb.ldif defines
the value, provider=ldaps://controller-0 in the
replication-sync(olcSyncrepl) parameter(directive)."

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/ansible-playbooks/+/882116
Committed: https://opendev.org/starlingx/ansible-playbooks/commit/8c7ff12aff7073be45c88d6fe312b54d4d854f05
Submitter: "Zuul (22348)"
Branch: master

commit 8c7ff12aff7073be45c88d6fe312b54d4d854f05
Author: ksingh <email address hidden>
Date: Wed May 3 02:57:08 2023 -0400

    Fix ldap restore failure when backup taken from controller-1

    The issue is, in a Duplex system when backup is taken from
    controller-1, the restore fails due to SLAPD failure.

    SLAPD fails to start because, the backup file
    /etc/ldap/schema/cn=config/olcDatabase={1}mdb.ldif defines
    the value, provider=ldaps://controller-0 in the
    replication-sync(olcSyncrepl) parameter(directive).

    When we do restore from controller-0 the provider ID
    controller-1 is expected.

    NOTE: Restore has to be from controller-0 as for the restore
    operation, controller-0 is implicit. Since restore would be
    used in disaster recovery/install scenario on duplex, restore
    is expected on controller-0.

    As a solution, conversion of provider value in sync-replication
    directive(olcsyncrepl) is made to point to controller-1.

    In AIO-SX, controller-0 provider is set to controller-1. This is
    the default value for AIO-SX. The changes mentioned in this review
    does not change the value for AIO-SX Backup and Restore.

    TEST PLAN
    PASS: AIO-SX: Backup and Restore passed
    PASS: AIO-DX: Backup and Restore passed

    Closes-Bug: 2017927

    Change-Id: Ib6c7655e8a8e0fbe8d1426918839054de44ebe64
    Signed-off-by: ksingh <email address hidden>