dotcloud/docker

package daemon // import "github.com/docker/docker/daemon"

import (
    "github.com/docker/docker/container"
    specs "github.com/opencontainers/runtime-spec/specs-go"
)

func setLinuxDomainname(c *container.Container, s *specs.Spec) {
    // There isn't a field in the OCI for the NIS domainname, but luckily there
    // is a sysctl which has an identical effect to setdomainname(2) so there's
    // no explicit need for runtime support.
    if s.Linux == nil {
        s.Linux = &specs.Linux{}
    }
    if s.Linux.Sysctl == nil {
        s.Linux.Sysctl = make(map[string]string)
    }
    if c.Config.Domainname != "" {
        s.Linux.Sysctl["kernel.domainname"] = c.Config.Domainname
    }
}