mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-12-28 11:20:30 +00:00
347 lines
10 KiB
Go
347 lines
10 KiB
Go
// Copyright 2023 Woodpecker Authors
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// Copyright 2018 Drone.IO Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package core
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import (
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"context"
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"crypto/tls"
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"errors"
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"fmt"
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"maps"
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"net/http"
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"os"
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"strings"
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"sync/atomic"
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"time"
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"github.com/rs/zerolog/log"
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"github.com/urfave/cli/v3"
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"golang.org/x/sync/errgroup"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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grpc_credentials "google.golang.org/grpc/credentials"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/keepalive"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/status"
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"go.woodpecker-ci.org/woodpecker/v3/agent"
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agent_rpc "go.woodpecker-ci.org/woodpecker/v3/agent/rpc"
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"go.woodpecker-ci.org/woodpecker/v3/pipeline/backend"
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"go.woodpecker-ci.org/woodpecker/v3/pipeline/backend/types"
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"go.woodpecker-ci.org/woodpecker/v3/pipeline/rpc"
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"go.woodpecker-ci.org/woodpecker/v3/shared/logger"
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"go.woodpecker-ci.org/woodpecker/v3/shared/utils"
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"go.woodpecker-ci.org/woodpecker/v3/version"
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)
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const (
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reportHealthInterval = time.Second * 10
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authInterceptorRefreshInterval = time.Minute * 30
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)
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const (
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shutdownTimeout = time.Second * 5
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)
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var (
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stopAgentFunc context.CancelCauseFunc = func(error) {}
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shutdownCancelFunc context.CancelFunc = func() {}
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shutdownCtx = context.Background()
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)
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func run(ctx context.Context, c *cli.Command, backends []types.Backend) error {
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agentCtx, ctxCancel := context.WithCancelCause(ctx)
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stopAgentFunc = func(err error) {
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msg := "shutdown of whole agent"
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if err != nil {
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log.Error().Err(err).Msg(msg)
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} else {
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log.Info().Msg(msg)
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}
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stopAgentFunc = func(error) {}
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shutdownCtx, shutdownCancelFunc = context.WithTimeout(shutdownCtx, shutdownTimeout)
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ctxCancel(err)
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}
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defer stopAgentFunc(nil)
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defer shutdownCancelFunc()
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serviceWaitingGroup := errgroup.Group{}
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agentConfigPath := c.String("agent-config")
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hostname := c.String("hostname")
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if len(hostname) == 0 {
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hostname, _ = os.Hostname()
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}
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counter.Polling = int(c.Int("max-workflows"))
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counter.Running = 0
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if c.Bool("healthcheck") {
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serviceWaitingGroup.Go(
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func() error {
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server := &http.Server{Addr: c.String("healthcheck-addr")}
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go func() {
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<-agentCtx.Done()
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log.Info().Msg("shutdown healthcheck server ...")
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if err := server.Shutdown(shutdownCtx); err != nil { //nolint:contextcheck
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log.Error().Err(err).Msg("shutdown healthcheck server failed")
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} else {
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log.Info().Msg("healthcheck server stopped")
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}
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}()
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if err := server.ListenAndServe(); err != nil {
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log.Error().Err(err).Msgf("cannot listen on address %s", c.String("healthcheck-addr"))
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}
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return nil
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})
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}
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var transport grpc.DialOption
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if c.Bool("grpc-secure") {
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log.Trace().Msg("use ssl for grpc")
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transport = grpc.WithTransportCredentials(grpc_credentials.NewTLS(&tls.Config{InsecureSkipVerify: c.Bool("grpc-skip-insecure")}))
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} else {
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transport = grpc.WithTransportCredentials(insecure.NewCredentials())
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}
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authConn, err := grpc.NewClient(
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c.String("server"),
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transport,
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grpc.WithKeepaliveParams(keepalive.ClientParameters{
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Time: c.Duration("grpc-keepalive-time"),
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Timeout: c.Duration("grpc-keepalive-timeout"),
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}),
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)
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if err != nil {
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return fmt.Errorf("could not create new gRPC 'channel' for authentication: %w", err)
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}
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defer authConn.Close()
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agentConfig := readAgentConfig(agentConfigPath)
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agentToken := c.String("grpc-token")
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grpcClientCtx, grpcClientCtxCancel := context.WithCancelCause(context.Background())
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defer grpcClientCtxCancel(nil)
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authClient := agent_rpc.NewAuthGrpcClient(authConn, agentToken, agentConfig.AgentID)
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authInterceptor, err := agent_rpc.NewAuthInterceptor(grpcClientCtx, authClient, authInterceptorRefreshInterval) //nolint:contextcheck
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if err != nil {
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return fmt.Errorf("could not create new auth interceptor: %w", err)
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}
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conn, err := grpc.NewClient(
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c.String("server"),
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transport,
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grpc.WithKeepaliveParams(keepalive.ClientParameters{
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Time: c.Duration("grpc-keepalive-time"),
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Timeout: c.Duration("grpc-keepalive-timeout"),
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}),
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grpc.WithUnaryInterceptor(authInterceptor.Unary()),
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grpc.WithStreamInterceptor(authInterceptor.Stream()),
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)
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if err != nil {
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return fmt.Errorf("could not create new gRPC 'channel' for normal orchestration: %w", err)
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}
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defer conn.Close()
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client := agent_rpc.NewGrpcClient(ctx, conn)
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agentConfigPersisted := atomic.Bool{}
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grpcCtx := metadata.NewOutgoingContext(grpcClientCtx, metadata.Pairs("hostname", hostname))
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// check if grpc server version is compatible with agent
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grpcServerVersion, err := client.Version(grpcCtx) //nolint:contextcheck
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if err != nil {
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log.Error().Err(err).Msg("could not get grpc server version")
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return err
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}
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if grpcServerVersion.GrpcVersion != agent_rpc.ClientGrpcVersion {
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err := errors.New("GRPC version mismatch")
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log.Error().Err(err).Msgf("server version %s does report grpc version %d but we only understand %d",
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grpcServerVersion.ServerVersion,
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grpcServerVersion.GrpcVersion,
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agent_rpc.ClientGrpcVersion)
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return err
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}
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// new engine
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backendCtx := context.WithValue(agentCtx, types.CliCommand, c)
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backendName := c.String("backend-engine")
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backendEngine, err := backend.FindBackend(backendCtx, backends, backendName)
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if err != nil {
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log.Error().Err(err).Msgf("cannot find backend engine '%s'", backendName)
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return err
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}
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if !backendEngine.IsAvailable(backendCtx) {
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log.Error().Str("engine", backendEngine.Name()).Msg("selected backend engine is unavailable")
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return fmt.Errorf("selected backend engine %s is unavailable", backendEngine.Name())
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}
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// load engine (e.g. init api client)
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engInfo, err := backendEngine.Load(backendCtx)
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if err != nil {
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log.Error().Err(err).Msg("cannot load backend engine")
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return err
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}
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log.Debug().Msgf("loaded %s backend engine", backendEngine.Name())
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maxWorkflows := int(c.Int("max-workflows"))
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customLabels := make(map[string]string)
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if err := stringSliceAddToMap(c.StringSlice("labels"), customLabels); err != nil {
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return err
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}
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if len(customLabels) != 0 {
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log.Debug().Msgf("custom labels detected: %#v", customLabels)
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}
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agentConfig.AgentID, err = client.RegisterAgent(grpcCtx, rpc.AgentInfo{ //nolint:contextcheck
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Version: version.String(),
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Backend: backendEngine.Name(),
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Platform: engInfo.Platform,
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Capacity: maxWorkflows,
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CustomLabels: customLabels,
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})
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if err != nil {
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return err
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}
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serviceWaitingGroup.Go(func() error {
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// we close grpc client context once unregister was handled
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defer grpcClientCtxCancel(nil)
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// we wait till agent context is done
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<-agentCtx.Done()
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// Remove stateless agents from server
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if !agentConfigPersisted.Load() {
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log.Debug().Msg("unregister agent from server ...")
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// we want to run it explicit run when context got canceled so run it in background
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err := client.UnregisterAgent(grpcClientCtx)
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if err != nil {
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log.Err(err).Msg("failed to unregister agent from server")
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} else {
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log.Info().Msg("agent unregistered from server")
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}
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}
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return nil
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})
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if agentConfigPath != "" {
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if err := writeAgentConfig(agentConfig, agentConfigPath); err == nil {
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agentConfigPersisted.Store(true)
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}
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}
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// set default labels ...
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labels := map[string]string{
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"hostname": hostname,
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"platform": engInfo.Platform,
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"backend": backendEngine.Name(),
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"repo": "*", // allow all repos by default
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}
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// ... and let it overwrite by custom ones
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maps.Copy(labels, customLabels)
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log.Debug().Any("labels", labels).Msgf("agent configured with labels")
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filter := rpc.Filter{
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Labels: labels,
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}
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log.Debug().Msgf("agent registered with ID %d", agentConfig.AgentID)
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serviceWaitingGroup.Go(func() error {
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for {
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err := client.ReportHealth(grpcCtx)
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if err != nil {
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log.Err(err).Msg("failed to report health")
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}
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select {
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case <-agentCtx.Done():
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log.Debug().Msg("terminating health reporting")
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return nil
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case <-time.After(reportHealthInterval):
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}
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}
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})
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for i := 0; i < maxWorkflows; i++ {
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i := i
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serviceWaitingGroup.Go(func() error {
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runner := agent.NewRunner(client, filter, hostname, counter, &backendEngine)
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log.Debug().Msgf("created new runner %d", i)
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for {
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if agentCtx.Err() != nil {
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return nil
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}
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log.Debug().Msg("polling new steps")
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if err := runner.Run(agentCtx, shutdownCtx); err != nil {
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log.Error().Err(err).Msg("runner done with error")
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return err
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}
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}
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})
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}
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log.Info().Msgf(
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"starting Woodpecker agent with version '%s' and backend '%s' using platform '%s' running up to %d pipelines in parallel",
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version.String(), backendEngine.Name(), engInfo.Platform, maxWorkflows)
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return serviceWaitingGroup.Wait()
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}
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func runWithRetry(backendEngines []types.Backend) func(ctx context.Context, c *cli.Command) error {
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return func(ctx context.Context, c *cli.Command) error {
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if err := logger.SetupGlobalLogger(ctx, c, true); err != nil {
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return err
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}
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initHealth()
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retryCount := int(c.Int("connect-retry-count"))
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retryDelay := c.Duration("connect-retry-delay")
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var err error
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for i := 0; i < retryCount; i++ {
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if err = run(ctx, c, backendEngines); status.Code(err) == codes.Unavailable {
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log.Warn().Err(err).Msg(fmt.Sprintf("cannot connect to server, retrying in %v", retryDelay))
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time.Sleep(retryDelay)
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} else {
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break
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}
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}
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return err
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}
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}
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func stringSliceAddToMap(sl []string, m map[string]string) error {
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if m == nil {
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m = make(map[string]string)
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}
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for _, v := range utils.StringSliceDeleteEmpty(sl) {
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before, after, _ := strings.Cut(v, "=")
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switch {
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case before != "" && after != "":
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m[before] = after
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case before != "":
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return fmt.Errorf("key '%s' does not have a value assigned", before)
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default:
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return fmt.Errorf("empty string in slice")
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}
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}
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return nil
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}
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