What went wrong?

What happened:

During installation raise error "nc: bad address 'host1,host2' waiting PostgreSQL" if set more one node in parameter externalPostgresql: host: host1,host2

What did you expect to happen:

According to the documentation (https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-MULTIPLE-HOSTS), Postgres clients and drivers must accept multiple hosts in the connect string as "host". Since libpq is eventually used here too, you should just skip the parameter as is, without trying to use its contents in a check with nc command, which doesn't understand multiple hosts.

this check raises error

How do we reproduce it?

1. Launch installation with set
   externalPostgresql: host: host1,host2
   more then one host

Grafana OnCall Version

v1.7.2

Product Area

Helm/Kubernetes/Docker

Grafana OnCall Platform?

Kubernetes

User's Browser?

No response

Anything else to add?

No response