tor/changes/ticket40194
David Goulet d543db5ac0 relay: Add connection stats to MetricsPort
This adds the number of created and opened connections to the
MetricsPort for a relay for each connection type and direction.

Output looks like:

  # HELP tor_relay_connections Connections metrics of this relay
  # TYPE tor_relay_connections counter
  tor_relay_connections{type="OR listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="OR listener",direction="received",state="created"} 0
  tor_relay_connections{type="OR listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="OR listener",direction="received",state="opened"} 0
  tor_relay_connections{type="OR",direction="initiated",state="created"} 5
  tor_relay_connections{type="OR",direction="received",state="created"} 0
  tor_relay_connections{type="OR",direction="initiated",state="opened"} 5
  tor_relay_connections{type="OR",direction="received",state="opened"} 0
  tor_relay_connections{type="Exit",direction="initiated",state="created"} 0
  tor_relay_connections{type="Exit",direction="received",state="created"} 0
  tor_relay_connections{type="Exit",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Exit",direction="received",state="opened"} 0
  tor_relay_connections{type="Socks listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Socks listener",direction="received",state="created"} 0
  tor_relay_connections{type="Socks listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Socks listener",direction="received",state="opened"} 0
  tor_relay_connections{type="Socks",direction="initiated",state="created"} 0
  tor_relay_connections{type="Socks",direction="received",state="created"} 0
  tor_relay_connections{type="Socks",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Socks",direction="received",state="opened"} 0
  tor_relay_connections{type="Directory listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Directory listener",direction="received",state="created"} 0
  tor_relay_connections{type="Directory listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Directory listener",direction="received",state="opened"} 0
  tor_relay_connections{type="Directory",direction="initiated",state="created"} 0
  tor_relay_connections{type="Directory",direction="received",state="created"} 0
  tor_relay_connections{type="Directory",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Directory",direction="received",state="opened"} 0
  tor_relay_connections{type="Control listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Control listener",direction="received",state="created"} 0
  tor_relay_connections{type="Control listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Control listener",direction="received",state="opened"} 0
  tor_relay_connections{type="Control",direction="initiated",state="created"} 0
  tor_relay_connections{type="Control",direction="received",state="created"} 0
  tor_relay_connections{type="Control",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Control",direction="received",state="opened"} 0
  tor_relay_connections{type="Transparent pf/netfilter listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Transparent pf/netfilter listener",direction="received",state="created"} 0
  tor_relay_connections{type="Transparent pf/netfilter listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Transparent pf/netfilter listener",direction="received",state="opened"} 0
  tor_relay_connections{type="Transparent natd listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Transparent natd listener",direction="received",state="created"} 0
  tor_relay_connections{type="Transparent natd listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Transparent natd listener",direction="received",state="opened"} 0
  tor_relay_connections{type="DNS listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="DNS listener",direction="received",state="created"} 0
  tor_relay_connections{type="DNS listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="DNS listener",direction="received",state="opened"} 0
  tor_relay_connections{type="Extended OR",direction="initiated",state="created"} 0
  tor_relay_connections{type="Extended OR",direction="received",state="created"} 0
  tor_relay_connections{type="Extended OR",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Extended OR",direction="received",state="opened"} 0
  tor_relay_connections{type="Extended OR listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Extended OR listener",direction="received",state="created"} 0
  tor_relay_connections{type="Extended OR listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Extended OR listener",direction="received",state="opened"} 0
  tor_relay_connections{type="HTTP tunnel listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="HTTP tunnel listener",direction="received",state="created"} 0
  tor_relay_connections{type="HTTP tunnel listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="HTTP tunnel listener",direction="received",state="opened"} 0
  tor_relay_connections{type="Metrics listener",direction="initiated",state="created"} 0
  tor_relay_connections{type="Metrics listener",direction="received",state="created"} 1
  tor_relay_connections{type="Metrics listener",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Metrics listener",direction="received",state="opened"} 1
  tor_relay_connections{type="Metrics",direction="initiated",state="created"} 0
  tor_relay_connections{type="Metrics",direction="received",state="created"} 0
  tor_relay_connections{type="Metrics",direction="initiated",state="opened"} 0
  tor_relay_connections{type="Metrics",direction="received",state="opened"} 0

Related to #40194

Signed-off-by: David Goulet <dgoulet@torproject.org>
2022-10-12 09:25:19 -04:00

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o Minor feature (relay, metrics):
- Add counters to the MetricsPort how many connections, per type, are
currently opened and how many were created. Part of ticket 40194.