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docs/Cluster-VictoriaMetrics.md: improve docs for dns+srv service discovery

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Aliaksandr Valialkin 2022-10-28 14:23:02 +03:00
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@ -207,11 +207,15 @@ Additionally, all the VictoriaMetrics components allow setting flag values via e
[Entrprise version of VictoriaMetrics](https://docs.victoriametrics.com/enterprise.html) supports [dns+srv](https://en.wikipedia.org/wiki/SRV_record) names
at `-storageNode` command-line flag passed to `vminsert` and `vmstorage`. In this case the provided `dns+srv` names are resolved
into tcp addresses of `vmstorage` nodes to connect to. The list of discovered `vmstorage` nodes is automatically updated at `vminsert` and `vmstorage`
when it changes behind the corresponding `dns+srv` names.
when it changes behind the corresponding `dns+srv` names. The `dns+srv` names must be prefixed with `dns+srv:` prefix.
It is possible specifying multiple `dns+srv` names at `-storageNode`. In this case all these names are resolved to tcp addresses of `vmstorage` nodes to connect to.
The `dns+srv` names must be prefixed with `dns+srv:` prefix. For example, `-storageNode=dns+srv:vmstorage.srv.nodes` . It is OK to passe regular addresses
together with `dns+srv` addresses at `-storageNode`.
It is possible passing multiple `dns+srv` names to `-storageNode` command-line flag. In this case all these names are resolved to tcp addresses of `vmstorage` nodes to connect to.
For example, `-storageNode='dns+srv:vmstorage-hot' -storageNode='dns+srv:vmstorage-cold'` .
It is OK to pass regular static `vmstorage` addresses together with `dns+srv` addresses at `-storageNode`. For example,
`-storageNode=vmstorage1,vmstorage2 -storageNode='dns+srv:vmstorage-autodiscovery'`.
The currently discovered `vmstorage` nodes can be [monitored](#monitoring) vith `vm_rpc_vmstorage_is_reachable` and `vm_rpc_vmstorage_is_read_only` metrics.
## mTLS protection