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health: add Tracker type, in prep for removing global variables

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This moves most of the health package global variables to a new
`health.Tracker` type.

But then rather than plumbing the Tracker in tsd.System everywhere,
this only goes halfway and makes one new global Tracker
(`health.Global`) that all the existing callers now use.

A future change will eliminate that global.

Updates #11874
Updates #4136

Change-Id: I6ee27e0b2e35f68cb38fecdb3b2dc4c3f2e09d68
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2024-04-25 13:24:49 -07:00
committed by Brad Fitzpatrick
parent d5fc52a0f5
commit ebc552d2e0
17 changed files with 268 additions and 256 deletions
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2
net/dns/manager_linux.go
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@ -271,7 +271,7 @@ func dnsMode(logf logger.Logf, env newOSConfigEnv) (ret string, err error) {
return "direct", nil
}
health.SetDNSManagerHealth(errors.New("systemd-resolved and NetworkManager are wired together incorrectly; MagicDNS will probably not work. For more info, see https://tailscale.com/s/resolved-nm"))
health.Global.SetDNSManagerHealth(errors.New("systemd-resolved and NetworkManager are wired together incorrectly; MagicDNS will probably not work. For more info, see https://tailscale.com/s/resolved-nm"))
dbg("nm-safe", "no")
return "systemd-resolved", nil
default: