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ipn/ipnlocal: use routecheck reports to make exit node suggestions

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Now that the routecheck subsystem is continuously collecting
reachability reports in the background, we can add a hook to
LocalBackend for fetching its report. That allows
suggestExitNodeUsingTrafficSteering to consult that report when
disqualifying candidates, instead of blocking on an immediate probe.

Exit node suggestions will only consult the report when the
`client-side-reachability` and `client-side-reachability-routecheck`
node attributes are both set on the current node.

Updates #17366
Updates tailscale/corp#33033

Signed-off-by: Simon Law <sfllaw@tailscale.com>
This commit is contained in:
Simon Law
2026-07-02 20:26:27 -07:00
committed by Simon Law
parent cb7e536804
commit 932260511e
19 changed files with 306 additions and 74 deletions
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cmd/derper/depaware.txt
+1
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@@ -108,6 +108,7 @@ tailscale.com/cmd/derper dependencies: (generated by github.com/tailscale/depawa
tailscale.com/net/netutil from tailscale.com/client/local
tailscale.com/net/netx from tailscale.com/net/dnscache+
tailscale.com/net/routecheck from tailscale.com/client/local
tailscale.com/net/routecheck/peernode from tailscale.com/net/routecheck
tailscale.com/net/sockstats from tailscale.com/derp/derphttp
tailscale.com/net/stun from tailscale.com/net/stunserver
tailscale.com/net/stunserver from tailscale.com/cmd/derper
cmd/k8s-operator/depaware.txt
+2 -1
View File
@@ -807,7 +807,8 @@ tailscale.com/cmd/k8s-operator dependencies: (generated by github.com/tailscale/
tailscale.com/net/portmapper from tailscale.com/feature/portmapper
tailscale.com/net/portmapper/portmappertype from tailscale.com/net/netcheck+
tailscale.com/net/proxymux from tailscale.com/tsnet
tailscale.com/net/routecheck from tailscale.com/client/local
tailscale.com/net/routecheck from tailscale.com/client/local+
tailscale.com/net/routecheck/peernode from tailscale.com/ipn/ipnlocal+
💣 tailscale.com/net/sockopts from tailscale.com/wgengine/magicsock
tailscale.com/net/socks5 from tailscale.com/tsnet
tailscale.com/net/sockstats from tailscale.com/control/controlclient+
cmd/tailscale/depaware.txt
+1
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@@ -236,6 +236,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
tailscale.com/net/portmapper from tailscale.com/feature/portmapper
tailscale.com/net/portmapper/portmappertype from tailscale.com/net/netcheck+
tailscale.com/net/routecheck from tailscale.com/client/local+
tailscale.com/net/routecheck/peernode from tailscale.com/net/routecheck
tailscale.com/net/sockstats from tailscale.com/control/controlhttp+
tailscale.com/net/stun from tailscale.com/net/netcheck
tailscale.com/net/tlsdial from tailscale.com/cmd/tailscale/cli+
cmd/tailscaled/depaware-min.txt
+1
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@@ -107,6 +107,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/net/packet/checksum from tailscale.com/net/tstun
tailscale.com/net/ping from tailscale.com/net/netcheck+
tailscale.com/net/portmapper/portmappertype from tailscale.com/net/netcheck+
tailscale.com/net/routecheck/peernode from tailscale.com/ipn/ipnlocal
tailscale.com/net/sockopts from tailscale.com/wgengine/magicsock
tailscale.com/net/sockstats from tailscale.com/control/controlclient+
tailscale.com/net/stun from tailscale.com/net/netcheck+
cmd/tailscaled/depaware-minbox.txt
+1
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@@ -124,6 +124,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/net/packet/checksum from tailscale.com/net/tstun
tailscale.com/net/ping from tailscale.com/net/netcheck+
tailscale.com/net/portmapper/portmappertype from tailscale.com/net/netcheck+
tailscale.com/net/routecheck/peernode from tailscale.com/ipn/ipnlocal
tailscale.com/net/sockopts from tailscale.com/wgengine/magicsock
tailscale.com/net/sockstats from tailscale.com/control/controlclient+
tailscale.com/net/stun from tailscale.com/net/netcheck+
cmd/tailscaled/depaware.txt
+1
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@@ -380,6 +380,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/net/portmapper/portmappertype from tailscale.com/feature/portmapper+
tailscale.com/net/proxymux from tailscale.com/cmd/tailscaled
tailscale.com/net/routecheck from tailscale.com/feature/routecheck+
tailscale.com/net/routecheck/peernode from tailscale.com/ipn/ipnlocal+
tailscale.com/net/routetable from tailscale.com/doctor/routetable
💣 tailscale.com/net/sockopts from tailscale.com/wgengine/magicsock+
tailscale.com/net/socks5 from tailscale.com/cmd/tailscaled
cmd/tailscaled/deps_test.go
+1 -1
View File
@@ -208,7 +208,7 @@ func TestOmitRouteCheck(t *testing.T) {
GOARCH: "amd64",
Tags: "ts_omit_routecheck,ts_include_cli",
OnDep: func(dep string) {
if strings.Contains(dep, "routecheck") {
if strings.Contains(dep, "routecheck") && !strings.HasSuffix(dep, "/peernode") {
t.Errorf("unexpected dep: %q", dep)
}
},
cmd/tsidp/depaware.txt
+2 -1
View File
@@ -206,7 +206,8 @@ tailscale.com/cmd/tsidp dependencies: (generated by github.com/tailscale/depawar
tailscale.com/net/portmapper from tailscale.com/feature/portmapper
tailscale.com/net/portmapper/portmappertype from tailscale.com/net/netcheck+
tailscale.com/net/proxymux from tailscale.com/tsnet
tailscale.com/net/routecheck from tailscale.com/client/local
tailscale.com/net/routecheck from tailscale.com/client/local+
tailscale.com/net/routecheck/peernode from tailscale.com/ipn/ipnlocal+
💣 tailscale.com/net/sockopts from tailscale.com/wgengine/magicsock
tailscale.com/net/socks5 from tailscale.com/tsnet
tailscale.com/net/sockstats from tailscale.com/control/controlclient+