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mirror of https://github.com/woodpecker-ci/woodpecker.git synced 2024-11-30 08:06:52 +02:00
woodpecker/cmd/agent/agent.go
velsinki dda4998261
Change healtcheck port into address format, redo #1197 (#1423)
As discussed in the comments in PR #1197. Also add documenation
accordingly.

One thing I'm not sure about is the simple check in health.go if the
address is usable in the GET request or not. From reading
https://pkg.go.dev/net#Dial it seems that the only non-standard address
format that would work in the `net` package but not in a GET url would
likely only be `:port`, as the others listed here are actually also
valid urls:

`For TCP, UDP and IP networks, if the host is empty or a literal
unspecified IP address, as in ":80", "0.0.0.0:80" or "[::]:80" for TCP
and UDP, "", "0.0.0.0" or "::" for IP, the local system is assumed.`

One additional thing I noticed is that while `WOODPECKER_SERVER_ADDR`
and `WOODPECKER_SERVER_ADDR` use the default value format of `:PORT`,
`WOODPECKER_SERVER` actually uses `localhost:9000`. I guess it makes a
bit of sense, considering the server might not be local to the agent,
but it looks a bit inconsistent this way. I don't think it would hurt to
make the `WOODPECKER_HEALTHCHECK_ADDR` in this format too, but then it's
different from the server flags again... :-)
2022-11-19 13:06:51 +02:00

203 lines
5.0 KiB
Go

// Copyright 2018 Drone.IO Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"crypto/tls"
"net/http"
"os"
"runtime"
"strings"
"sync"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/tevino/abool"
"github.com/urfave/cli/v2"
"google.golang.org/grpc"
grpccredentials "google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/metadata"
"github.com/woodpecker-ci/woodpecker/agent"
"github.com/woodpecker-ci/woodpecker/pipeline/backend"
"github.com/woodpecker-ci/woodpecker/pipeline/backend/types"
"github.com/woodpecker-ci/woodpecker/pipeline/rpc"
"github.com/woodpecker-ci/woodpecker/shared/utils"
"github.com/woodpecker-ci/woodpecker/version"
)
func loop(c *cli.Context) error {
hostname := c.String("hostname")
if len(hostname) == 0 {
hostname, _ = os.Hostname()
}
labels := map[string]string{
"hostname": hostname,
"platform": runtime.GOOS + "/" + runtime.GOARCH,
"repo": "*", // allow all repos by default
}
for _, v := range c.StringSlice("filter") {
parts := strings.SplitN(v, "=", 2)
labels[parts[0]] = parts[1]
}
filter := rpc.Filter{
Labels: labels,
}
if c.Bool("pretty") {
log.Logger = log.Output(
zerolog.ConsoleWriter{
Out: os.Stderr,
NoColor: c.Bool("nocolor"),
},
)
}
zerolog.SetGlobalLevel(zerolog.InfoLevel)
if c.IsSet("log-level") {
logLevelFlag := c.String("log-level")
lvl, err := zerolog.ParseLevel(logLevelFlag)
if err != nil {
log.Fatal().Msgf("unknown logging level: %s", logLevelFlag)
}
zerolog.SetGlobalLevel(lvl)
}
if zerolog.GlobalLevel() <= zerolog.DebugLevel {
log.Logger = log.With().Caller().Logger()
}
counter.Polling = c.Int("max-workflows")
counter.Running = 0
if c.Bool("healthcheck") {
go func() {
if err := http.ListenAndServe(c.String("healthcheck-addr"), nil); err != nil {
log.Error().Msgf("cannot listen on address %s: %v", c.String("healthcheck-addr"), err)
}
}()
}
// TODO pass version information to grpc server
// TODO authenticate to grpc server
// grpc.Dial(target, ))
var transport grpc.DialOption
if c.Bool("grpc-secure") {
transport = grpc.WithTransportCredentials(grpccredentials.NewTLS(&tls.Config{InsecureSkipVerify: c.Bool("skip-insecure-grpc")}))
} else {
transport = grpc.WithTransportCredentials(insecure.NewCredentials())
}
conn, err := grpc.Dial(
c.String("server"),
transport,
grpc.WithPerRPCCredentials(&credentials{
username: c.String("grpc-username"),
password: c.String("grpc-password"),
}),
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: c.Duration("grpc-keepalive-time"),
Timeout: c.Duration("grpc-keepalive-timeout"),
}),
)
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 = utils.WithContextSigtermCallback(ctx, func() {
println("ctrl+c received, terminating process")
sigterm.Set()
})
backend.Init(context.WithValue(ctx, types.CliContext, c))
var wg sync.WaitGroup
parallel := c.Int("max-workflows")
wg.Add(parallel)
// new engine
engine, err := backend.FindEngine(c.String("backend-engine"))
if err != nil {
log.Error().Err(err).Msgf("cannot find backend engine '%s'", c.String("backend-engine"))
return err
}
for i := 0; i < parallel; i++ {
go func() {
defer wg.Done()
// load engine (e.g. init api client)
err = engine.Load()
if err != nil {
log.Error().Err(err).Msg("cannot load backend engine")
return
}
r := agent.NewRunner(client, filter, hostname, counter, &engine)
log.Debug().Msgf("loaded %s backend engine", engine.Name())
for {
if sigterm.IsSet() {
return
}
log.Debug().Msg("polling new steps")
if err := r.Run(ctx); err != nil {
log.Error().Err(err).Msg("pipeline done with error")
return
}
}
}()
}
log.Info().Msgf(
"Starting Woodpecker agent with version '%s' and backend '%s' running up to %d pipelines in parallel",
version.String(), engine.Name(), parallel)
wg.Wait()
return nil
}
type credentials struct {
username string
password string
}
func (c *credentials) GetRequestMetadata(context.Context, ...string) (map[string]string, error) {
return map[string]string{
"username": c.username,
"password": c.password,
}, nil
}
func (c *credentials) RequireTransportSecurity() bool {
return false
}