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c88547ce71
Continues on from #19202. Following the addition of pprof labels we can now more easily understand the relationship between a goroutine and the requests that spawn them. This PR takes advantage of the labels and adds a few others, then provides a mechanism for the monitoring page to query the pprof goroutine profile. The binary profile that results from this profile is immediately piped in to the google library for parsing this and then stack traces are formed for the goroutines. If the goroutine is within a context or has been created from a goroutine within a process context it will acquire the process description labels for that process. The goroutines are mapped with there associate pids and any that do not have an associated pid are placed in a group at the bottom as unbound. In this way we should be able to more easily examine goroutines that have been stuck. A manager command `gitea manager processes` is also provided that can export the processes (with or without stacktraces) to the command line. Signed-off-by: Andrew Thornton <art27@cantab.net>
85 lines
2.8 KiB
Go
85 lines
2.8 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package context
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import (
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"context"
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"fmt"
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"net/http"
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"time"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/process"
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)
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// PrivateContext represents a context for private routes
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type PrivateContext struct {
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*Context
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Override context.Context
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}
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// Deadline is part of the interface for context.Context and we pass this to the request context
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func (ctx *PrivateContext) Deadline() (deadline time.Time, ok bool) {
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if ctx.Override != nil {
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return ctx.Override.Deadline()
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}
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return ctx.Req.Context().Deadline()
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}
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// Done is part of the interface for context.Context and we pass this to the request context
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func (ctx *PrivateContext) Done() <-chan struct{} {
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if ctx.Override != nil {
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return ctx.Override.Done()
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}
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return ctx.Req.Context().Done()
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}
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// Err is part of the interface for context.Context and we pass this to the request context
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func (ctx *PrivateContext) Err() error {
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if ctx.Override != nil {
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return ctx.Override.Err()
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}
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return ctx.Req.Context().Err()
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}
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var privateContextKey interface{} = "default_private_context"
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// WithPrivateContext set up private context in request
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func WithPrivateContext(req *http.Request, ctx *PrivateContext) *http.Request {
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return req.WithContext(context.WithValue(req.Context(), privateContextKey, ctx))
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}
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// GetPrivateContext returns a context for Private routes
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func GetPrivateContext(req *http.Request) *PrivateContext {
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return req.Context().Value(privateContextKey).(*PrivateContext)
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}
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// PrivateContexter returns apicontext as middleware
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func PrivateContexter() func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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ctx := &PrivateContext{
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Context: &Context{
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Resp: NewResponse(w),
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Data: map[string]interface{}{},
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},
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}
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ctx.Req = WithPrivateContext(req, ctx)
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ctx.Data["Context"] = ctx
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next.ServeHTTP(ctx.Resp, ctx.Req)
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})
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}
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}
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// OverrideContext overrides the underlying request context for Done() etc.
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// This function should be used when there is a need for work to continue even if the request has been cancelled.
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// Primarily this affects hook/post-receive and hook/proc-receive both of which need to continue working even if
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// the underlying request has timed out from the ssh/http push
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func OverrideContext(ctx *PrivateContext) (cancel context.CancelFunc) {
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// We now need to override the request context as the base for our work because even if the request is cancelled we have to continue this work
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ctx.Override, _, cancel = process.GetManager().AddTypedContext(graceful.GetManager().HammerContext(), fmt.Sprintf("PrivateContext: %s", ctx.Req.RequestURI), process.RequestProcessType, true)
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return
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}
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