mirror of https://github.com/tailscale/tailscale/
doctor: add ts_omit_doctor support
Updates #12614 Change-Id: I84c166c4b99ca75d70abe4087e5ff3f7d90d4bcc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>pull/17309/head
Brad Fitzpatrick
2 months ago
committed by
Brad Fitzpatrick
parent
87ee0f4e98
commit
832e94607e
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Code generated by gen.go; DO NOT EDIT.
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//go:build ts_omit_doctor
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package buildfeatures
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// HasDoctor is whether the binary was built with support for modular feature "Diagnose possible issues with Tailscale and its host environment".
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// Specifically, it's whether the binary was NOT built with the "ts_omit_doctor" build tag.
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// It's a const so it can be used for dead code elimination.
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const HasDoctor = false
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Code generated by gen.go; DO NOT EDIT.
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//go:build !ts_omit_doctor
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package buildfeatures
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// HasDoctor is whether the binary was built with support for modular feature "Diagnose possible issues with Tailscale and its host environment".
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// Specifically, it's whether the binary was NOT built with the "ts_omit_doctor" build tag.
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// It's a const so it can be used for dead code elimination.
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const HasDoctor = true
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build !ts_omit_doctor
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package condregister
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import _ "tailscale.com/feature/doctor"
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// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// The doctor package registers the "doctor" problem diagnosis support into the
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// rest of Tailscale.
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package doctor
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import (
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"context"
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"fmt"
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"html"
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"net/http"
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"time"
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"tailscale.com/doctor"
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"tailscale.com/doctor/ethtool"
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"tailscale.com/doctor/permissions"
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"tailscale.com/doctor/routetable"
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"tailscale.com/ipn/ipnlocal"
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"tailscale.com/net/tsaddr"
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"tailscale.com/types/logger"
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)
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func init() {
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ipnlocal.HookDoctor.Set(visitDoctor)
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ipnlocal.RegisterPeerAPIHandler("/v0/doctor", handleServeDoctor)
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}
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func handleServeDoctor(h ipnlocal.PeerAPIHandler, w http.ResponseWriter, r *http.Request) {
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if !h.CanDebug() {
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http.Error(w, "denied; no debug access", http.StatusForbidden)
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return
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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fmt.Fprintln(w, "<h1>Doctor Output</h1>")
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fmt.Fprintln(w, "<pre>")
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b := h.LocalBackend()
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visitDoctor(r.Context(), b, func(format string, args ...any) {
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line := fmt.Sprintf(format, args...)
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fmt.Fprintln(w, html.EscapeString(line))
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})
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fmt.Fprintln(w, "</pre>")
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}
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func visitDoctor(ctx context.Context, b *ipnlocal.LocalBackend, logf logger.Logf) {
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// We can write logs too fast for logtail to handle, even when
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// opting-out of rate limits. Limit ourselves to at most one message
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// per 20ms and a burst of 60 log lines, which should be fast enough to
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// not block for too long but slow enough that we can upload all lines.
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logf = logger.SlowLoggerWithClock(ctx, logf, 20*time.Millisecond, 60, b.Clock().Now)
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var checks []doctor.Check
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checks = append(checks,
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permissions.Check{},
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routetable.Check{},
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ethtool.Check{},
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)
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// Print a log message if any of the global DNS resolvers are Tailscale
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// IPs; this can interfere with our ability to connect to the Tailscale
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// controlplane.
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checks = append(checks, doctor.CheckFunc("dns-resolvers", func(_ context.Context, logf logger.Logf) error {
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nm := b.NetMap()
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if nm == nil {
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return nil
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}
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for i, resolver := range nm.DNS.Resolvers {
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ipp, ok := resolver.IPPort()
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if ok && tsaddr.IsTailscaleIP(ipp.Addr()) {
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logf("resolver %d is a Tailscale address: %v", i, resolver)
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}
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}
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for i, resolver := range nm.DNS.FallbackResolvers {
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ipp, ok := resolver.IPPort()
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if ok && tsaddr.IsTailscaleIP(ipp.Addr()) {
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logf("fallback resolver %d is a Tailscale address: %v", i, resolver)
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}
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}
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return nil
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}))
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// TODO(andrew): more
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numChecks := len(checks)
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checks = append(checks, doctor.CheckFunc("numchecks", func(_ context.Context, log logger.Logf) error {
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log("%d checks", numChecks)
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return nil
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}))
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doctor.RunChecks(ctx, logf, checks...)
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}
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