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Move the capabilities detection into a runtime method

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This commit is contained in:
Guillaume J. Charmes 2013-04-26 14:32:55 -07:00
parent 8f81e175af
commit 9042535f5a
2 changed files with 23 additions and 18 deletions
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39
runtime.go
View file

@ -307,6 +307,27 @@ func (runtime *Runtime) restore() error {
return nil
}
func (runtime *Runtime) UpdateCapabilities(quiet bool) {
if cgroupMemoryMountpoint, err := FindCgroupMountpoint("memory"); err != nil {
if !quiet {
log.Printf("WARNING: %s\n", err)
}
} else {
_, err1 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.limit_in_bytes"))
_, err2 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.soft_limit_in_bytes"))
runtime.capabilities.MemoryLimit = err1 == nil && err2 == nil
if !runtime.capabilities.MemoryLimit && !quiet {
log.Printf("WARNING: Your kernel does not support cgroup memory limit.")
}
_, err = ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.memsw.limit_in_bytes"))
runtime.capabilities.SwapLimit = err == nil
if !runtime.capabilities.SwapLimit && !quiet {
log.Printf("WARNING: Your kernel does not support cgroup swap limit.")
}
}
}
// FIXME: harmonize with NewGraph()
func NewRuntime(autoRestart bool) (*Runtime, error) {
runtime, err := NewRuntimeFromDirectory("/var/lib/docker", autoRestart)
@ -322,23 +343,7 @@ func NewRuntime(autoRestart bool) (*Runtime, error) {
log.Printf("WARNING: You are running linux kernel version %s, which might be unstable running docker. Please upgrade your kernel to 3.8.0.", k.String())
}
}
if cgroupMemoryMountpoint, err := FindCgroupMountpoint("memory"); err != nil {
log.Printf("WARNING: %s\n", err)
} else {
_, err1 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.limit_in_bytes"))
_, err2 := ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.soft_limit_in_bytes"))
runtime.capabilities.MemoryLimit = err1 == nil && err2 == nil
if !runtime.capabilities.MemoryLimit {
log.Printf("WARNING: Your kernel does not support cgroup memory limit.")
}
_, err = ioutil.ReadFile(path.Join(cgroupMemoryMountpoint, "memory.memsw.limit_in_bytes"))
runtime.capabilities.SwapLimit = err == nil
if !runtime.capabilities.SwapLimit {
log.Printf("WARNING: Your kernel does not support cgroup swap limit.")
}
}
runtime.UpdateCapabilities(false)
return runtime, nil
}

2
runtime_test.go
View file

@ -93,7 +93,7 @@ func newTestRuntime() (*Runtime, error) {
if err != nil {
return nil, err
}
runtime.UpdateCapabilities(true)
return runtime, nil
}