Method setupNetwork

engine/engineutil/executor_spec.go:170–335

nolint:gocyclo

(ctx context.Context, state *execState)

//nolint:gocyclo
func (c *Client) setupNetwork(ctx context.Context, state *execState) error {
	provider, ok := c.NetworkProviders[state.procInfo.Meta.NetMode]
	if !ok {
		return fmt.Errorf("unknown network mode %s", state.procInfo.Meta.NetMode)
	}

	networkHostname := state.procInfo.Meta.Hostname
	switch {
	case networkHostname != "":
	case state.procInfo.Meta.SecurityMode == pb.SecurityMode_INSECURE:
		networkHostname = uuid.NewString()
		state.procInfo.Meta.Hostname = networkHostname
	default:
		state.procInfo.Meta.Hostname = defaultHostname
	}

	networkNamespace, err := provider.New(ctx, networkHostname)
	if err != nil {
		return fmt.Errorf("create network namespace: %w", err)
	}
	state.cleanups.Add("close network namespace", networkNamespace.Close)
	state.networkNamespace = networkNamespace

	state.resolvConfPath, err = oci.GetResolvConf(ctx, c.ExecutorRoot, c.IdentityMapping, c.DNSConfig, state.procInfo.Meta.NetMode)
	if err != nil {
		return fmt.Errorf("get base resolv.conf: %w", err)
	}

	var cleanupBaseHosts func()
	state.hostsFilePath, cleanupBaseHosts, err = oci.GetHostsFile(
		ctx, c.ExecutorRoot, state.procInfo.Meta.ExtraHosts, c.IdentityMapping, state.procInfo.Meta.Hostname)
	if err != nil {
		return fmt.Errorf("get base hosts file: %w", err)
	}
	if cleanupBaseHosts != nil {
		state.cleanups.Add("cleanup base hosts file", cleanups.Infallible(cleanupBaseHosts))
	}

	if state.sessionID == "" {
		return nil
	}

	extraSearchDomains := []string{}
	if state.execMD != nil {
		extraSearchDomains = append(extraSearchDomains, state.execMD.ExtraSearchDomains...)
	}
	extraSearchDomains = append(extraSearchDomains, network.SessionDomain(state.sessionID))

	baseResolvFile, err := os.Open(state.resolvConfPath)
	if err != nil {
		return fmt.Errorf("open base resolv.conf: %w", err)
	}
	defer baseResolvFile.Close()

	baseResolvStat, err := baseResolvFile.Stat()
	if err != nil {
		return fmt.Errorf("stat base resolv.conf: %w", err)
	}