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package networks
import (
"context"
"errors"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"gitlab.com/gitlab-org/gitlab-runner/common"
"gitlab.com/gitlab-org/gitlab-runner/executors/docker/internal/labels"
"gitlab.com/gitlab-org/gitlab-runner/helpers/docker"
"gitlab.com/gitlab-org/gitlab-runner/helpers/featureflags"
)
var errBuildNetworkExists = errors.New("build network is not empty")
type Manager interface {
Create(ctx context.Context, networkMode string) (container.NetworkMode, error)
Inspect(ctx context.Context) (types.NetworkResource, error)
Cleanup(ctx context.Context) error
}
type manager struct {
logger debugLogger
client docker.Client
build *common.Build
labeler labels.Labeler
networkMode container.NetworkMode
buildNetwork types.NetworkResource
perBuild bool
}
func NewManager(logger debugLogger, dockerClient docker.Client, build *common.Build, labeler labels.Labeler) Manager {
return &manager{
logger: logger,
client: dockerClient,
build: build,
labeler: labeler,
}
}
func (m *manager) Create(ctx context.Context, networkMode string) (container.NetworkMode, error) {
m.networkMode = container.NetworkMode(networkMode)
m.perBuild = false
if networkMode != "" {
return m.networkMode, nil
}
if !m.build.IsFeatureFlagOn(featureflags.NetworkPerBuild) {
return m.networkMode, nil
}
if m.buildNetwork.ID != "" {
return "", errBuildNetworkExists
}
networkName := fmt.Sprintf("%s-job-%d-network", m.build.ProjectUniqueName(), m.build.ID)
m.logger.Debugln("Creating build network ", networkName)
networkResponse, err := m.client.NetworkCreate(
ctx,
networkName,
types.NetworkCreate{Labels: m.labeler.Labels(map[string]string{})},
)
if err != nil {
return "", err
}
// Inspect the created network to save its details
m.buildNetwork, err = m.client.NetworkInspect(ctx, networkResponse.ID)
if err != nil {
return "", err
}
m.networkMode = container.NetworkMode(networkName)
m.perBuild = true
return m.networkMode, nil
}
func (m *manager) Inspect(ctx context.Context) (types.NetworkResource, error) {
if !m.perBuild {
return types.NetworkResource{}, nil
}
m.logger.Debugln("Inspect docker network: ", m.buildNetwork.ID)
return m.client.NetworkInspect(ctx, m.buildNetwork.ID)
}
func (m *manager) Cleanup(ctx context.Context) error {
if !m.build.IsFeatureFlagOn(featureflags.NetworkPerBuild) {
return nil
}
if !m.perBuild {
return nil
}
m.logger.Debugln("Removing network: ", m.buildNetwork.ID)
err := m.client.NetworkRemove(ctx, m.buildNetwork.ID)
if err != nil {
return fmt.Errorf("docker remove network %s: %w", m.buildNetwork.ID, err)
}
return nil
}
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