Grafana cannot deploy with custom home dashboard

[psycofdj]

Since version v27.2.0 and its upgrade to grafana 8.5.15, the post-start script fail for grafana

Task 369950 | 10:17:55 | L executing post-start: grafana/ff8ec6a4-ac9b-4222-9875-2a552b0d6b74 (0) (canary) (00:00:40)
                       L Error: Action Failed get_task: Task 3006e3aa-76f5-4619-76d4-24572f123766 result: 1 of 2 post-start scripts failed. Failed Jobs: grafana. Successful Jobs: bosh-dns.
Task 369950 | 10:18:01 | Error: Action Failed get_task: Task 3006e3aa-76f5-4619-76d4-24572f123766 result: 1 of 2 post-start scripts failed. Failed Jobs: grafana. Successful Jobs: bosh-dns.

After some investigation, the error occurs in the script /var/vcap/jobs/grafana/bin/grafana-homepage which use grafana API to:

1. uploads a custom home dashboard given in the grafana.dashboards.custom_homepage_json property
2. sets preferences to use this dashboard as home dashboad

Those api calls are made using the slugs endpoints which were deprecated in v7 and removed in v8.

[benjaminguttmann-avtq]

So if I get it right this happens only if you have the grafana.dashboards.custom_homepage_json configured, right?

[psycofdj]

indeed