dotcloud/docker

package main

import (
    cdcgroups "github.com/containerd/cgroups/v3"
    systemdDaemon "github.com/coreos/go-systemd/v22/daemon"
    "github.com/docker/docker/daemon"
    "github.com/docker/docker/daemon/config"
    "github.com/docker/docker/pkg/sysinfo"
    "github.com/pkg/errors"
)

// setPlatformOptions applies platform-specific CLI configuration options.
func setPlatformOptions(conf *config.Config) error {
    if conf.RemappedRoot == "" {
        return nil
    }

    containerdNamespace, containerdPluginNamespace, err := daemon.RemapContainerdNamespaces(conf)
    if err != nil {
        return err
    }
    conf.ContainerdNamespace = containerdNamespace
    conf.ContainerdPluginNamespace = containerdPluginNamespace

    return nil
}

// preNotifyReady sends a message to the host when the API is active, but before the daemon is
func preNotifyReady() {
}

// notifyReady sends a message to the host when the server is ready to be used
func notifyReady() {
    // Tell the init daemon we are accepting requests
    go systemdDaemon.SdNotify(false, systemdDaemon.SdNotifyReady)
}

// notifyStopping sends a message to the host when the server is shutting down
func notifyStopping() {
    go systemdDaemon.SdNotify(false, systemdDaemon.SdNotifyStopping)
}

func validateCPURealtimeOptions(config *config.Config) error {
    if config.CPURealtimePeriod == 0 && config.CPURealtimeRuntime == 0 {
        return nil
    }
    if cdcgroups.Mode() == cdcgroups.Unified {
        return errors.New("daemon-scoped cpu-rt-period and cpu-rt-runtime are not implemented for cgroup v2")
    }
    if !sysinfo.New().CPURealtime {
        return errors.New("daemon-scoped cpu-rt-period and cpu-rt-runtime are not supported by the kernel")
    }
    return nil
}