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Add state method to return container's runtime state

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Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This commit is contained in:
Michael Crosby
2015-02-11 14:45:07 -08:00
parent 9f0cca11d0
commit 7fff13632e
6 changed files with 192 additions and 26 deletions
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46
linux_container.go
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@@ -43,13 +43,55 @@ func (c *linuxContainer) Status() (configs.Status, error) {
}
return 0, err
}
if c.config.Cgroups != nil &&
c.config.Cgroups.Freezer == configs.Frozen {
if c.config.Cgroups != nil && c.config.Cgroups.Freezer == configs.Frozen {
return configs.Paused, nil
}
return configs.Running, nil
}
func (c *linuxContainer) State() (*State, error) {
status, err := c.Status()
if err != nil {
return nil, err
}
if status == configs.Destroyed {
return nil, newGenericError(fmt.Errorf("container destroyed"), ContainerNotExists)
}
startTime, err := c.initProcess.startTime()
if err != nil {
return nil, err
}
state := &State{
InitProcessPid: c.initProcess.pid(),
InitProcessStartTime: startTime,
CgroupPaths: c.cgroupManager.GetPaths(),
NamespacePaths: make(map[string]string),
}
for _, ns := range c.config.Namespaces {
if ns.Path != "" {
state.NamespacePaths[string(ns.Type)] = ns.Path
continue
}
file := ""
switch ns.Type {
case configs.NEWNET:
file = "net"
case configs.NEWNS:
file = "mnt"
case configs.NEWPID:
file = "pid"
case configs.NEWIPC:
file = "ipc"
case configs.NEWUSER:
file = "user"
case configs.NEWUTS:
file = "uts"
}
state.NamespacePaths[string(ns.Type)] = fmt.Sprintf("/proc/%d/ns/%s", c.initProcess.pid(), file)
}
return state, nil
}
func (c *linuxContainer) Processes() ([]int, error) {
glog.Info("fetch container processes")
pids, err := c.cgroupManager.GetPids()