forked from harness/gitness
/
agent.go
465 lines (387 loc) · 10.6 KB
/
agent.go
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package main
import (
"context"
"encoding/json"
"io"
"io/ioutil"
"net/http"
"os"
"strconv"
"sync"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
"github.com/cncd/pipeline/pipeline"
"github.com/cncd/pipeline/pipeline/backend"
"github.com/cncd/pipeline/pipeline/backend/docker"
"github.com/cncd/pipeline/pipeline/multipart"
"github.com/cncd/pipeline/pipeline/rpc"
"github.com/drone/signal"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/tevino/abool"
"github.com/urfave/cli"
oldcontext "golang.org/x/net/context"
)
func loop(c *cli.Context) error {
filter := rpc.Filter{
Labels: map[string]string{
"platform": c.String("platform"),
},
Expr: c.String("drone-filter"),
}
hostname := c.String("hostname")
if len(hostname) == 0 {
hostname, _ = os.Hostname()
}
if c.BoolT("debug") {
zerolog.SetGlobalLevel(zerolog.DebugLevel)
} else {
zerolog.SetGlobalLevel(zerolog.WarnLevel)
}
if c.Bool("pretty") {
log.Logger = log.Output(
zerolog.ConsoleWriter{
Out: os.Stderr,
NoColor: c.BoolT("nocolor"),
},
)
}
counter.Polling = c.Int("max-procs")
counter.Running = 0
if c.BoolT("healthcheck") {
go http.ListenAndServe(":3000", nil)
}
// TODO pass version information to grpc server
// TODO authenticate to grpc server
// grpc.Dial(target, ))
conn, err := grpc.Dial(
c.String("server"),
grpc.WithInsecure(),
grpc.WithPerRPCCredentials(&credentials{
username: c.String("username"),
password: c.String("password"),
}),
)
if err != nil {
return err
}
defer conn.Close()
client := rpc.NewGrpcClient(conn)
sigterm := abool.New()
ctx := metadata.NewOutgoingContext(
context.Background(),
metadata.Pairs("hostname", hostname),
)
ctx = signal.WithContextFunc(ctx, func() {
println("ctrl+c received, terminating process")
sigterm.Set()
})
var wg sync.WaitGroup
parallel := c.Int("max-procs")
wg.Add(parallel)
for i := 0; i < parallel; i++ {
go func() {
defer wg.Done()
for {
if sigterm.IsSet() {
return
}
r := runner{
client: client,
filter: filter,
hostname: hostname,
}
if err := r.run(ctx); err != nil {
log.Error().Err(err).Msg("pipeline done with error")
return
}
}
}()
}
wg.Wait()
return nil
}
// NOTE we need to limit the size of the logs and files that we upload.
// The maximum grpc payload size is 4194304. So until we implement streaming
// for uploads, we need to set these limits below the maximum.
const (
maxLogsUpload = 2000000 // this is per step
maxFileUpload = 1000000
)
type runner struct {
client rpc.Peer
filter rpc.Filter
hostname string
}
func (r *runner) run(ctx context.Context) error {
log.Debug().
Msg("request next execution")
meta, _ := metadata.FromOutgoingContext(ctx)
ctxmeta := metadata.NewOutgoingContext(context.Background(), meta)
// get the next job from the queue
work, err := r.client.Next(ctx, r.filter)
if err != nil {
return err
}
if work == nil {
return nil
}
timeout := time.Hour
if minutes := work.Timeout; minutes != 0 {
timeout = time.Duration(minutes) * time.Minute
}
counter.Add(
work.ID,
timeout,
extractRepositoryName(work.Config), // hack
extractBuildNumber(work.Config), // hack
)
defer counter.Done(work.ID)
logger := log.With().
Str("repo", extractRepositoryName(work.Config)). // hack
Str("build", extractBuildNumber(work.Config)). // hack
Str("id", work.ID).
Logger()
logger.Debug().
Msg("received execution")
// new docker engine
engine, err := docker.NewEnv()
if err != nil {
logger.Error().
Err(err).
Msg("cannot create docker client")
return err
}
ctx, cancel := context.WithTimeout(ctxmeta, timeout)
defer cancel()
cancelled := abool.New()
go func() {
logger.Debug().
Msg("listen for cancel signal")
if werr := r.client.Wait(ctx, work.ID); werr != nil {
cancelled.SetTo(true)
logger.Warn().
Err(werr).
Msg("cancel signal received")
cancel()
} else {
logger.Debug().
Msg("stop listening for cancel signal")
}
}()
go func() {
for {
select {
case <-ctx.Done():
logger.Debug().
Msg("pipeline done")
return
case <-time.After(time.Minute):
logger.Debug().
Msg("pipeline lease renewed")
r.client.Extend(ctx, work.ID)
}
}
}()
state := rpc.State{}
state.Started = time.Now().Unix()
err = r.client.Init(ctxmeta, work.ID, state)
if err != nil {
logger.Error().
Err(err).
Msg("pipeline initialization failed")
}
var uploads sync.WaitGroup
defaultLogger := pipeline.LogFunc(func(proc *backend.Step, rc multipart.Reader) error {
loglogger := logger.With().
Str("image", proc.Image).
Str("stage", proc.Alias).
Logger()
part, rerr := rc.NextPart()
if rerr != nil {
return rerr
}
uploads.Add(1)
var secrets []string
for _, secret := range work.Config.Secrets {
if secret.Mask {
secrets = append(secrets, secret.Value)
}
}
loglogger.Debug().Msg("log stream opened")
limitedPart := io.LimitReader(part, maxLogsUpload)
logstream := rpc.NewLineWriter(r.client, work.ID, proc.Alias, secrets...)
io.Copy(logstream, limitedPart)
loglogger.Debug().Msg("log stream copied")
file := &rpc.File{}
file.Mime = "application/json+logs"
file.Proc = proc.Alias
file.Name = "logs.json"
file.Data, _ = json.Marshal(logstream.Lines())
file.Size = len(file.Data)
file.Time = time.Now().Unix()
loglogger.Debug().
Msg("log stream uploading")
if serr := r.client.Upload(ctxmeta, work.ID, file); serr != nil {
loglogger.Error().
Err(serr).
Msg("log stream upload error")
}
loglogger.Debug().
Msg("log stream upload complete")
defer func() {
loglogger.Debug().
Msg("log stream closed")
uploads.Done()
}()
part, rerr = rc.NextPart()
if rerr != nil {
return nil
}
// TODO should be configurable
limitedPart = io.LimitReader(part, maxFileUpload)
file = &rpc.File{}
file.Mime = part.Header().Get("Content-Type")
file.Proc = proc.Alias
file.Name = part.FileName()
file.Data, _ = ioutil.ReadAll(limitedPart)
file.Size = len(file.Data)
file.Time = time.Now().Unix()
file.Meta = map[string]string{}
for key, value := range part.Header() {
file.Meta[key] = value[0]
}
loglogger.Debug().
Str("file", file.Name).
Str("mime", file.Mime).
Msg("file stream uploading")
if serr := r.client.Upload(ctxmeta, work.ID, file); serr != nil {
loglogger.Error().
Err(serr).
Str("file", file.Name).
Str("mime", file.Mime).
Msg("file stream upload error")
}
loglogger.Debug().
Str("file", file.Name).
Str("mime", file.Mime).
Msg("file stream upload complete")
return nil
})
defaultTracer := pipeline.TraceFunc(func(state *pipeline.State) error {
proclogger := logger.With().
Str("image", state.Pipeline.Step.Image).
Str("stage", state.Pipeline.Step.Alias).
Int("exit_code", state.Process.ExitCode).
Bool("exited", state.Process.Exited).
Logger()
procState := rpc.State{
Proc: state.Pipeline.Step.Alias,
Exited: state.Process.Exited,
ExitCode: state.Process.ExitCode,
Started: time.Now().Unix(), // TODO do not do this
Finished: time.Now().Unix(),
}
defer func() {
proclogger.Debug().
Msg("update step status")
if uerr := r.client.Update(ctxmeta, work.ID, procState); uerr != nil {
proclogger.Debug().
Err(uerr).
Msg("update step status error")
}
proclogger.Debug().
Msg("update step status complete")
}()
if state.Process.Exited {
return nil
}
if state.Pipeline.Step.Environment == nil {
state.Pipeline.Step.Environment = map[string]string{}
}
state.Pipeline.Step.Environment["DRONE_MACHINE"] = r.hostname
state.Pipeline.Step.Environment["CI_BUILD_STATUS"] = "success"
state.Pipeline.Step.Environment["CI_BUILD_STARTED"] = strconv.FormatInt(state.Pipeline.Time, 10)
state.Pipeline.Step.Environment["CI_BUILD_FINISHED"] = strconv.FormatInt(time.Now().Unix(), 10)
state.Pipeline.Step.Environment["DRONE_BUILD_STATUS"] = "success"
state.Pipeline.Step.Environment["DRONE_BUILD_STARTED"] = strconv.FormatInt(state.Pipeline.Time, 10)
state.Pipeline.Step.Environment["DRONE_BUILD_FINISHED"] = strconv.FormatInt(time.Now().Unix(), 10)
state.Pipeline.Step.Environment["CI_JOB_STATUS"] = "success"
state.Pipeline.Step.Environment["CI_JOB_STARTED"] = strconv.FormatInt(state.Pipeline.Time, 10)
state.Pipeline.Step.Environment["CI_JOB_FINISHED"] = strconv.FormatInt(time.Now().Unix(), 10)
state.Pipeline.Step.Environment["DRONE_JOB_STATUS"] = "success"
state.Pipeline.Step.Environment["DRONE_JOB_STARTED"] = strconv.FormatInt(state.Pipeline.Time, 10)
state.Pipeline.Step.Environment["DRONE_JOB_FINISHED"] = strconv.FormatInt(time.Now().Unix(), 10)
if state.Pipeline.Error != nil {
state.Pipeline.Step.Environment["CI_BUILD_STATUS"] = "failure"
state.Pipeline.Step.Environment["CI_JOB_STATUS"] = "failure"
state.Pipeline.Step.Environment["DRONE_BUILD_STATUS"] = "failure"
state.Pipeline.Step.Environment["DRONE_JOB_STATUS"] = "failure"
}
return nil
})
err = pipeline.New(work.Config,
pipeline.WithContext(ctx),
pipeline.WithLogger(defaultLogger),
pipeline.WithTracer(defaultTracer),
pipeline.WithEngine(engine),
).Run()
state.Finished = time.Now().Unix()
state.Exited = true
if err != nil {
switch xerr := err.(type) {
case *pipeline.ExitError:
state.ExitCode = xerr.Code
default:
state.ExitCode = 1
state.Error = err.Error()
}
if cancelled.IsSet() {
state.ExitCode = 137
}
}
logger.Debug().
Str("error", state.Error).
Int("exit_code", state.ExitCode).
Msg("pipeline complete")
logger.Debug().
Msg("uploading logs")
uploads.Wait()
logger.Debug().
Msg("uploading logs complete")
logger.Debug().
Str("error", state.Error).
Int("exit_code", state.ExitCode).
Msg("updating pipeline status")
err = r.client.Done(ctxmeta, work.ID, state)
if err != nil {
logger.Error().Err(err).
Msg("updating pipeline status failed")
} else {
logger.Debug().
Msg("updating pipeline status complete")
}
return nil
}
type credentials struct {
username string
password string
}
func (c *credentials) GetRequestMetadata(oldcontext.Context, ...string) (map[string]string, error) {
return map[string]string{
"username": c.username,
"password": c.password,
}, nil
}
func (c *credentials) RequireTransportSecurity() bool {
return false
}
// extract repository name from the configuration
func extractRepositoryName(config *backend.Config) string {
return config.Stages[0].Steps[0].Environment["DRONE_REPO"]
}
// extract build number from the configuration
func extractBuildNumber(config *backend.Config) string {
return config.Stages[0].Steps[0].Environment["DRONE_BUILD_NUMBER"]
}