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Replace the timestamp based state system

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This commit replaces the timestamp based state system with a new
one that has update channels directly to the connected nodes. It
will send an update to all listening clients via the polling
mechanism.

It introduces a new package notifier, which has a concurrency safe
manager for all our channels to the connected nodes.

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby 2023-06-21 11:29:52 +02:00 • committed by Kristoffer Dalby
parent 056d3a81c5
commit 66ff1fcd40
13 changed files with 216 additions and 731 deletions
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11
hscontrol/metrics.go
View file

@ -10,12 +10,6 @@ const prometheusNamespace = "headscale"
var (
// This is a high cardinality metric (user x machines), we might want to make this
// configurable/opt-in in the future.
lastStateUpdate = promauto.NewGaugeVec(prometheus.GaugeOpts{
Namespace: prometheusNamespace,
Name: "last_update_seconds",
Help: "Time stamp in unix time when a machine or headscale was updated",
}, []string{"user", "machine"})
machineRegistrations = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: prometheusNamespace,
Name: "machine_registrations_total",
@ -33,9 +27,4 @@ var (
Help: "The number of calls/messages issued on a specific nodes update channel",
}, []string{"user", "machine", "status"})
// TODO(kradalby): This is very debugging, we might want to remove it.
updateRequestsReceivedOnChannel = promauto.NewCounterVec(prometheus.CounterOpts{
Namespace: prometheusNamespace,
Name: "update_request_received_on_channel_total",
Help: "The number of update requests received on an update channel",
}, []string{"user", "machine"})
)