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docker.go
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docker.go
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package notifications
import (
"context"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/mount"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"github.com/icinga/icinga-testing/services"
"github.com/icinga/icinga-testing/utils"
"go.uber.org/zap"
"os"
"sync"
"sync/atomic"
)
type dockerCreator struct {
logger *zap.Logger
dockerClient *client.Client
dockerNetworkId string
containerNamePrefix string
sharedDirPath string
containerCounter uint32
runningMutex sync.Mutex
running map[*dockerBinaryInstance]struct{}
}
var _ Creator = (*dockerCreator)(nil)
func NewDockerCreator(
logger *zap.Logger,
dockerClient *client.Client,
containerNamePrefix string,
dockerNetworkId string,
sharedDirPath string,
) Creator {
return &dockerCreator{
logger: logger.With(zap.Bool("icinga_notifications", true)),
dockerClient: dockerClient,
dockerNetworkId: dockerNetworkId,
containerNamePrefix: containerNamePrefix,
sharedDirPath: sharedDirPath,
running: make(map[*dockerBinaryInstance]struct{}),
}
}
func (i *dockerCreator) CreateIcingaNotifications(
rdb services.RelationalDatabase,
options ...services.IcingaNotificationsOption,
) services.IcingaNotificationsBase {
inst := &dockerBinaryInstance{
info: info{
rdb: rdb,
port: defaultPort,
},
logger: i.logger,
icingaNotificationsDockerBinary: i,
}
configFile, err := os.CreateTemp("", "icinga_notifications.yml")
if err != nil {
panic(err)
}
err = configFile.Chmod(0666) // defaults to 0600, might result in being unreadable from container UID 1000
if err != nil {
panic(err)
}
idb := &services.IcingaNotifications{IcingaNotificationsBase: inst}
for _, option := range options {
option(idb)
}
if err = idb.WriteConfig(configFile); err != nil {
panic(err)
}
inst.configFileName = configFile.Name()
err = configFile.Close()
if err != nil {
panic(err)
}
containerName := fmt.Sprintf("%s-%d", i.containerNamePrefix, atomic.AddUint32(&i.containerCounter, 1))
inst.logger = inst.logger.With(zap.String("container-name", containerName))
networkName, err := utils.DockerNetworkName(context.Background(), i.dockerClient, i.dockerNetworkId)
if err != nil {
panic(err)
}
dockerImage := utils.GetEnvDefault("ICINGA_TESTING_NOTIFICATIONS_IMAGE", "icinga-notifications:latest")
err = utils.DockerImagePull(context.Background(), inst.logger, i.dockerClient, dockerImage, false)
if err != nil {
panic(err)
}
cont, err := i.dockerClient.ContainerCreate(context.Background(), &container.Config{
Image: dockerImage,
}, &container.HostConfig{
Mounts: []mount.Mount{{
Type: mount.TypeBind,
Source: inst.configFileName,
Target: "/etc/icinga-notifications/config.yml",
ReadOnly: true,
}, {
Type: mount.TypeBind,
Source: i.sharedDirPath,
Target: "/shared",
ReadOnly: true,
}},
}, &network.NetworkingConfig{
EndpointsConfig: map[string]*network.EndpointSettings{
networkName: {
NetworkID: i.dockerNetworkId,
},
},
}, nil, containerName)
if err != nil {
inst.logger.Fatal("failed to create icinga-notifications container", zap.Error(err))
}
inst.containerId = cont.ID
inst.logger = inst.logger.With(zap.String("container-id", cont.ID))
inst.logger.Debug("created container")
err = utils.ForwardDockerContainerOutput(context.Background(), i.dockerClient, cont.ID,
false, utils.NewLineWriter(func(line []byte) {
inst.logger.Debug("container output",
zap.ByteString("line", line))
}))
if err != nil {
inst.logger.Fatal("failed to attach to container output", zap.Error(err))
}
err = i.dockerClient.ContainerStart(context.Background(), cont.ID, types.ContainerStartOptions{})
if err != nil {
inst.logger.Fatal("failed to start container", zap.Error(err))
}
inst.logger.Debug("started container")
inst.info.host = utils.MustString(utils.DockerContainerAddress(context.Background(), i.dockerClient, cont.ID))
i.runningMutex.Lock()
i.running[inst] = struct{}{}
i.runningMutex.Unlock()
return inst
}
func (i *dockerCreator) Cleanup() {
i.runningMutex.Lock()
instances := make([]*dockerBinaryInstance, 0, len(i.running))
for inst := range i.running {
instances = append(instances, inst)
}
i.runningMutex.Unlock()
for _, inst := range instances {
inst.Cleanup()
}
}
type dockerBinaryInstance struct {
info
icingaNotificationsDockerBinary *dockerCreator
logger *zap.Logger
containerId string
configFileName string
}
var _ services.IcingaNotificationsBase = (*dockerBinaryInstance)(nil)
func (i *dockerBinaryInstance) Cleanup() {
i.icingaNotificationsDockerBinary.runningMutex.Lock()
delete(i.icingaNotificationsDockerBinary.running, i)
i.icingaNotificationsDockerBinary.runningMutex.Unlock()
err := i.icingaNotificationsDockerBinary.dockerClient.ContainerRemove(context.Background(), i.containerId, types.ContainerRemoveOptions{
Force: true,
RemoveVolumes: true,
})
if err != nil {
panic(err)
}
i.logger.Debug("removed container")
err = os.Remove(i.configFileName)
if err != nil {
panic(err)
}
}