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Add pprof labels in processes and for lifecycles (#19202)

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Use pprof labelling to help identify goroutines with stacks.

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2022-03-25 12:47:12 +00:00 • committed by GitHub
parent e48f3b0527
commit 5fe764b1eb
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 55 additions and 48 deletions
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17
modules/graceful/manager_unix.go
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@ -12,6 +12,7 @@ import (
"errors"
"os"
"os/signal"
"runtime/pprof"
"sync"
"syscall"
"time"
@ -29,11 +30,11 @@ type Manager struct {
shutdownCtx context.Context
hammerCtx context.Context
terminateCtx context.Context
doneCtx context.Context
managerCtx context.Context
shutdownCtxCancel context.CancelFunc
hammerCtxCancel context.CancelFunc
terminateCtxCancel context.CancelFunc
doneCtxCancel context.CancelFunc
managerCtxCancel context.CancelFunc
runningServerWaitGroup sync.WaitGroup
createServerWaitGroup sync.WaitGroup
terminateWaitGroup sync.WaitGroup
@ -58,7 +59,17 @@ func (g *Manager) start(ctx context.Context) {
g.terminateCtx, g.terminateCtxCancel = context.WithCancel(ctx)
g.shutdownCtx, g.shutdownCtxCancel = context.WithCancel(ctx)
g.hammerCtx, g.hammerCtxCancel = context.WithCancel(ctx)
g.doneCtx, g.doneCtxCancel = context.WithCancel(ctx)
g.managerCtx, g.managerCtxCancel = context.WithCancel(ctx)
// Next add pprof labels to these contexts
g.terminateCtx = pprof.WithLabels(g.terminateCtx, pprof.Labels("graceful-lifecycle", "with-terminate"))
g.shutdownCtx = pprof.WithLabels(g.shutdownCtx, pprof.Labels("graceful-lifecycle", "with-shutdown"))
g.hammerCtx = pprof.WithLabels(g.hammerCtx, pprof.Labels("graceful-lifecycle", "with-hammer"))
g.managerCtx = pprof.WithLabels(g.managerCtx, pprof.Labels("graceful-lifecycle", "with-manager"))
// Now label this and all goroutines created by this goroutine with the graceful-lifecycle manager
pprof.SetGoroutineLabels(g.managerCtx)
defer pprof.SetGoroutineLabels(ctx)
// Set the running state & handle signals
g.setState(stateRunning)