Go package for creating, managing, inspecting, and destroying cgroups. The resources format for settings on the cgroup uses the OCI runtime-spec found here.
This creates a new cgroup using a static path for all subsystems under /test
.
- /sys/fs/cgroup/cpu/test
- /sys/fs/cgroup/memory/test
- etc....
It uses a single hierarchy and specifies cpu shares as a resource constraint and uses the v1 implementation of cgroups.
shares := 100
control, err := cgroups.New(cgroups.V1, cgroups.StaticPath("/test"), &specs.Resources{
CPU: &specs.CPU{
Shares: &shares,
},
})
defer control.Delete()
control, err := cgroups.New(cgroups.Systemd, cgroups.Slice("system.slice", "runc-test"), &specs.Resources{
CPU: &specs.CPU{
Shares: &shares,
},
})
control, err = cgroups.Load(cgroups.V1, cgroups.StaticPath("/test"))
if err := control.Add(Process{Pid:1234}); err != nil {
}
To update the resources applied in the cgroup
shares = 200
if err := control.Update(&specs.Resources{
CPU: &specs.CPU{
Shares: &shares,
},
}); err != nil {
}
if err := control.Freeze(); err != nil {
}
if err := control.Thaw(); err != nil {
}
processes, err := control.Processes(cgroups.Devices, recursive)
stats, err := control.Stat()
This allows you to take processes from one cgroup and move them to another.
err := control.MoveTo(destionation)
subCgroup, err := control.New("child", resources)
Copyright (c) 2016-2017 Michael Crosby. [email protected]
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.