Cli dsl for endpoint urls

anti-social commented 3 years ago

Motivation:

Original elasticsearch exporter has some options to control endpoints:

es.all - if true, query stats for all nodes in the cluster
es.cluster_settings - if true, query stats for cluster settings
es.indices - if true, query stats for all indices in the cluster
es.shards - if true, query stats for all indices in the cluster, including shard-level stats
es.indices_settings - if true, query settings stats for all indices in the cluster
es.snapshots - if true, query stats for the cluster snapshots

When you specify those options the exporter can enable corresponding endpoint and configure its url.

Description

We also should have those endpoints are configured but are disabled by default.

At the moment it is possible to form an endpoint url from predefined parts:

- id: nodes
  url: local?groups
  url_parts:
    paths:
      local: /_nodes/_local/stats
      all: /_nodes/stats
    params:
      groups:
        name: groups
        value: _all

In this case local?groups will form /_nodes/_local/stats?group=_all url.

We can override url using --endpoint-url option:

--endpoint-url nodes:all will produce /_nodes/stats?groups=_all
--endpoint-url 'nodes:all?' - /_nodes/stats

What should be implemented:

disable any endpoint, for example with nodes:-
endpoint can be disabled by default and then enabled, nodes:+
disable single url parameter, nodes:?-groups

Consider how that DSL might look like.

Use nom to parse DSL.

trkohler commented 3 years ago

may i take a look on this one? I can' t promise it will be fast tho

anti-social commented 3 years ago

may i take a look on this one?

Surely

anti-social / json-exporter

Cli dsl for endpoint urls #1