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| author | Ahmad Sherif <ahmad.m.sherif@gmail.com> | 2019-09-02 13:30:05 +0000 |
|---|---|---|
| committer | Ahmad Sherif <me@ahmadsherif.com> | 2019-09-05 12:53:33 +0200 |
| commit | 568e2684a262616fa3c25c130a6724967c50eff4 (patch) | |
| tree | affba69add975e0d1c802ef569a3a7be59718b8e | |
| parent | 273ba34c9e85269c6f7653727caafc49fa151fd1 (diff) | |
| download | gitlab-ce-add-docs-for-srv-handling.tar.gz | |
Document DB load balancing SRV records handlingadd-docs-for-srv-handling
| -rw-r--r-- | doc/administration/database_load_balancing.md | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/administration/database_load_balancing.md b/doc/administration/database_load_balancing.md index 64eca0b00f6..3b1151ae570 100644 --- a/doc/administration/database_load_balancing.md +++ b/doc/administration/database_load_balancing.md @@ -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 |