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[Added] account specific monitoring endpoint(s) (#3250)

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Added http monitoring endpoint /accstatz
It responds with a list of statz for all accounts with local connections
the argument "unused=1" can be provided to get statz for all accounts
This endpoint is also exposed as nats request under:

This monitoring endpoint is exposed via the system account.
$SYS.REQ.ACCOUNT.*.STATZ
Each server will respond with connection statistics for the requested
account. The format of the data section is a list (size 1) identical to the event
$SYS.ACCOUNT.%s.SERVER.CONNS which is sent periodically as well as on
connect/disconnect. Unless requested by options, server without the account,
or server where the account has no local connections, will not respond.

A PING endpoint exists as well. The response format is identical to
$SYS.REQ.ACCOUNT.*.STATZ
(however the data section will contain more than one account, if they exist)
In addition to general filter options the request takes a list of accounts and
an argument to include accounts without local connections (disabled by default)
$SYS.REQ.ACCOUNT.PING.STATZ

Each account has a new system account import where the local subject
$SYS.REQ.ACCOUNT.PING.STATZ essentially responds as if
the importing account name was used for $SYS.REQ.ACCOUNT.*.STATZ

The only difference between requesting ACCOUNT.PING.STATZ from within
the system account and an account is that the later can only retrieve
statz for the account the client requests from.

Also exposed the monitoring /healthz via the system account under
$SYS.REQ.SERVER.*.HEALTHZ
$SYS.REQ.SERVER.PING.HEALTHZ
No dedicated options are available for these.
HEALTHZ also accept general filter options.

Signed-off-by: Matthias Hanel <mh@synadia.com>
This commit is contained in:
Matthias Hanel
2022-07-12 21:50:32 +02:00
committed by GitHub
parent 520d323ea5
commit d53d2d0484
10 changed files with 350 additions and 178 deletions
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5
server/jetstream_super_cluster_test.go
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@@ -516,7 +516,7 @@ func TestJetStreamSuperClusterConnectionCount(t *testing.T) {
sysNc := natsConnect(t, sc.randomServer().ClientURL(), nats.UserInfo("admin", "s3cr3t!"))
defer sysNc.Close()
_, err := sysNc.Request(fmt.Sprintf(accReqSubj, "ONE", "CONNS"), nil, 100*time.Millisecond)
_, err := sysNc.Request(fmt.Sprintf(accDirectReqSubj, "ONE", "CONNS"), nil, 100*time.Millisecond)
// this is a timeout as the server only responds when it has connections....
// not convinced this should be that way, but also not the issue to investigate.
require_True(t, err == nats.ErrTimeout)
@@ -561,7 +561,7 @@ func TestJetStreamSuperClusterConnectionCount(t *testing.T) {
// There should be no active NATS CLIENT connections, but we still need
// to wait a little bit...
checkFor(t, 2*time.Second, 15*time.Millisecond, func() error {
_, err := sysNc.Request(fmt.Sprintf(accReqSubj, "ONE", "CONNS"), nil, 100*time.Millisecond)
_, err := sysNc.Request(fmt.Sprintf(accDirectReqSubj, "ONE", "CONNS"), nil, 100*time.Millisecond)
if err != nats.ErrTimeout {
return fmt.Errorf("Expected timeout, got %v", err)
}
@@ -2087,6 +2087,7 @@ func TestJetStreamSuperClusterMovingStreamAndMoveBack(t *testing.T) {
checkMove := func(cluster string) {
t.Helper()
sc.waitOnStreamLeader("$G", "TEST")
checkFor(t, 20*time.Second, 100*time.Millisecond, func() error {
si, err := js.StreamInfo("TEST")
if err != nil {