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tsd, ipnlocal, etc: add tsd.System.HealthTracker, start some plumbing

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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>
This commit is contained in:
Brad Fitzpatrick
2024-04-25 20:29:20 -07:00
committed by Brad Fitzpatrick
parent cb66952a0d
commit 723c775dbb
19 changed files with 91 additions and 45 deletions
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2
control/controlclient/direct.go
View File

@@ -248,7 +248,7 @@ func NewDirect(opts Options) (*Direct, error) {
tr := http.DefaultTransport.(*http.Transport).Clone()
tr.Proxy = tshttpproxy.ProxyFromEnvironment
tshttpproxy.SetTransportGetProxyConnectHeader(tr)
tr.TLSClientConfig = tlsdial.Config(serverURL.Hostname(), tr.TLSClientConfig)
tr.TLSClientConfig = tlsdial.Config(serverURL.Hostname(), health.Global, tr.TLSClientConfig)
tr.DialContext = dnscache.Dialer(opts.Dialer.SystemDial, dnsCache)
tr.DialTLSContext = dnscache.TLSDialer(opts.Dialer.SystemDial, dnsCache, tr.TLSClientConfig)
tr.ForceAttemptHTTP2 = true

3
control/controlhttp/client.go
View File

@@ -38,6 +38,7 @@ import (
"tailscale.com/control/controlbase"
"tailscale.com/envknob"
"tailscale.com/health"
"tailscale.com/net/dnscache"
"tailscale.com/net/dnsfallback"
"tailscale.com/net/netutil"
@@ -433,7 +434,7 @@ func (a *Dialer) tryURLUpgrade(ctx context.Context, u *url.URL, addr netip.Addr,
// Disable HTTP2, since h2 can't do protocol switching.
tr.TLSClientConfig.NextProtos = []string{}
tr.TLSNextProto = map[string]func(string, *tls.Conn) http.RoundTripper{}
tr.TLSClientConfig = tlsdial.Config(a.Hostname, tr.TLSClientConfig)
tr.TLSClientConfig = tlsdial.Config(a.Hostname, health.Global, tr.TLSClientConfig)
if !tr.TLSClientConfig.InsecureSkipVerify {
panic("unexpected") // should be set by tlsdial.Config
}