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moby--moby/daemon/reload_unix.go
Rob Gulewich 072400fc4b Make cgroup namespaces configurable
This adds both a daemon-wide flag and a container creation property:
- Set the `CgroupnsMode: "host|private"` HostConfig property at
  container creation time to control what cgroup namespace the container
  is created in
- Set the `--default-cgroupns-mode=host|private` daemon flag to control
  what cgroup namespace containers are created in by default
- Set the default if the daemon flag is unset to "host", for backward
  compatibility
- Default to CgroupnsMode: "host" for client versions < 1.40

Signed-off-by: Rob Gulewich <rgulewich@netflix.com>
2019-05-07 10:22:16 -07:00

61 lines
1.7 KiB
Go

// +build linux freebsd
package daemon // import "github.com/docker/docker/daemon"
import (
"bytes"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/daemon/config"
)
// reloadPlatform updates configuration with platform specific options
// and updates the passed attributes
func (daemon *Daemon) reloadPlatform(conf *config.Config, attributes map[string]string) error {
if err := conf.ValidatePlatformConfig(); err != nil {
return err
}
if conf.IsValueSet("runtimes") {
// Always set the default one
conf.Runtimes[config.StockRuntimeName] = types.Runtime{Path: DefaultRuntimeBinary}
if err := daemon.initRuntimes(conf.Runtimes); err != nil {
return err
}
daemon.configStore.Runtimes = conf.Runtimes
}
if conf.DefaultRuntime != "" {
daemon.configStore.DefaultRuntime = conf.DefaultRuntime
}
if conf.IsValueSet("default-shm-size") {
daemon.configStore.ShmSize = conf.ShmSize
}
if conf.CgroupNamespaceMode != "" {
daemon.configStore.CgroupNamespaceMode = conf.CgroupNamespaceMode
}
if conf.IpcMode != "" {
daemon.configStore.IpcMode = conf.IpcMode
}
// Update attributes
var runtimeList bytes.Buffer
for name, rt := range daemon.configStore.Runtimes {
if runtimeList.Len() > 0 {
runtimeList.WriteRune(' ')
}
runtimeList.WriteString(fmt.Sprintf("%s:%s", name, rt))
}
attributes["runtimes"] = runtimeList.String()
attributes["default-runtime"] = daemon.configStore.DefaultRuntime
attributes["default-shm-size"] = fmt.Sprintf("%d", daemon.configStore.ShmSize)
attributes["default-ipc-mode"] = daemon.configStore.IpcMode
attributes["default-cgroupns-mode"] = daemon.configStore.CgroupNamespaceMode
return nil
}