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tailscale/control/controlhttp
Brad Fitzpatrick 723c775dbb tsd, ipnlocal, etc: add tsd.System.HealthTracker, start some plumbing
This adds a health.Tracker to tsd.System, accessible via
a new tsd.System.HealthTracker method.

In the future, that new method will return a tsd.System-specific
HealthTracker, so multiple tsnet.Servers in the same process are
isolated. For now, though, it just always returns the temporary
health.Global value. That permits incremental plumbing over a number
of changes. When the second to last health.Global reference is gone,
then the tsd.System.HealthTracker implementation can return a private
Tracker.

The primary plumbing this does is adding it to LocalBackend and its
dozen and change health calls. A few misc other callers are also
plumbed. Subsequent changes will flesh out other parts of the tree
(magicsock, controlclient, etc).

Updates #11874
Updates #4136

Change-Id: Id51e73cfc8a39110425b6dc19d18b3975eac75ce
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
6 months ago
..
client.go tsd, ipnlocal, etc: add tsd.System.HealthTracker, start some plumbing 6 months ago
client_common.go all: update copyright and license headers 2 years ago
client_js.go net/wsconn: accept a remote addr string and plumb it through 1 year ago
constants.go control: use tstime instead of time (#8595) 1 year ago
http_test.go all: use Go 1.22 range-over-int 7 months ago
server.go net/wsconn: accept a remote addr string and plumb it through 1 year ago