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Merge branch 'add-docs-for-srv-handling' into 'master'

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CE port: Document SRV handling for DB load balancing

See merge request gitlab-org/gitlab-ce!32539
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Thong Kuah 2019-09-06 07:41:33 +00:00
commit 6fd0de9dde
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6
doc/administration/database_load_balancing.md
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@ -146,7 +146,11 @@ The following options can be set:
| `use_tcp` | Lookup DNS resources using TCP instead of UDP | false |
If `record_type` is set to `SRV`, GitLab will continue to use a round-robin algorithm
and will ignore the `weight` and `priority` in the record.
and will ignore the `weight` and `priority` in the record. Since SRV records usually
return hostnames instead of IPs, GitLab will look for the IPs of returned hostnames
in the additional section of the SRV response. If no IP is found for a hostname, Gitlab
will query the configured `nameserver` for ANY record for each such hostname looking for A or AAAA records, eventually
dropping this hostname from rotation if it can't resolve its IP.
The `interval` value specifies the _minimum_ time between checks. If the A
record has a TTL greater than this value, then service discovery will honor said