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execdriver flag for docker daemon

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like the storage-driver flag, this implements a flag for choosing the
  execdriver to be used, defaulting to lxc.

Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
This commit is contained in:
Vincent Batts 2014-02-17 16:54:36 -05:00
parent a3bc3bb8c3
commit 5f84d7f314
4 changed files with 16 additions and 1 deletions
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2
config.go
View file

@ -25,6 +25,7 @@ type DaemonConfig struct {
BridgeIP string
InterContainerCommunication bool
GraphDriver string
ExecDriver string
Mtu int
DisableNetwork bool
}
@ -43,6 +44,7 @@ func DaemonConfigFromJob(job *engine.Job) *DaemonConfig {
DefaultIp: net.ParseIP(job.Getenv("DefaultIp")),
InterContainerCommunication: job.GetenvBool("InterContainerCommunication"),
GraphDriver: job.Getenv("GraphDriver"),
ExecDriver: job.Getenv("ExecDriver"),
}
if dns := job.GetenvList("Dns"); dns != nil {
config.Dns = dns

2
docker/docker.go
View file

@ -39,6 +39,7 @@ func main() {
flDefaultIp = flag.String([]string{"#ip", "-ip"}, "0.0.0.0", "Default IP address to use when binding container ports")
flInterContainerComm = flag.Bool([]string{"#icc", "-icc"}, true, "Enable inter-container communication")
flGraphDriver = flag.String([]string{"s", "-storage-driver"}, "", "Force the docker runtime to use a specific storage driver")
flExecDriver = flag.String([]string{"e", "-exec-driver"}, "", "Force the docker runtime to use a specific exec driver")
flHosts = opts.NewListOpts(api.ValidateHost)
flMtu = flag.Int([]string{"#mtu", "-mtu"}, 0, "Set the containers network MTU; if no value is provided: default to the default route MTU or 1500 if not default route is available")
)
@ -98,6 +99,7 @@ func main() {
job.Setenv("DefaultIp", *flDefaultIp)
job.SetenvBool("InterContainerCommunication", *flInterContainerComm)
job.Setenv("GraphDriver", *flGraphDriver)
job.Setenv("ExecDriver", *flExecDriver)
job.SetenvInt("Mtu", *flMtu)
if err := job.Run(); err != nil {
log.Fatal(err)

1
docs/sources/reference/commandline/cli.rst
View file

@ -79,6 +79,7 @@ Commands
-p, --pidfile="/var/run/docker.pid": Path to use for daemon PID file
-r, --restart=true: Restart previously running containers
-s, --storage-driver="": Force the docker runtime to use a specific storage driver
-e, --exec-driver="": Force the docker runtime to use a specific exec driver
-v, --version=false: Print version information and quit
-mtu, --mtu=0: Set the containers network MTU; if no value is provided: default to the default route MTU or 1500 if not default route is available

12
runtime.go
View file

@ -7,6 +7,7 @@ import (
"github.com/dotcloud/docker/dockerversion"
"github.com/dotcloud/docker/engine"
"github.com/dotcloud/docker/execdriver"
"github.com/dotcloud/docker/execdriver/chroot"
"github.com/dotcloud/docker/execdriver/lxc"
"github.com/dotcloud/docker/graphdriver"
"github.com/dotcloud/docker/graphdriver/aufs"
@ -703,7 +704,16 @@ func NewRuntimeFromDirectory(config *DaemonConfig, eng *engine.Engine) (*Runtime
sysInfo := sysinfo.New(false)
ed, err := lxc.NewDriver(config.Root, sysInfo.AppArmor)
var ed execdriver.Driver
utils.Debugf("execDriver: provided %s", config.ExecDriver)
if config.ExecDriver == "chroot" && false {
// chroot is presently a noop driver https://github.com/dotcloud/docker/pull/4189#issuecomment-35330655
ed, err = chroot.NewDriver()
utils.Debugf("execDriver: using chroot")
} else {
ed, err = lxc.NewDriver(config.Root, sysInfo.AppArmor)
utils.Debugf("execDriver: using lxc")
}
if err != nil {
return nil, err
}