Documentation
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Index ¶
Constants ¶
const ( // The percent of the machine memory capacity. The value is used to calculate // docker memory resource container's hardlimit to workaround docker memory // leakage issue. Please see kubernetes/issues/9881 for more detail. DockerMemoryLimitThresholdPercent = 70 // The minimum memory limit allocated to docker container: 150Mi MinDockerMemoryLimit = 150 * 1024 * 1024 )
Variables ¶
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Functions ¶
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Types ¶
type CgroupConfig ¶ added in v1.4.2
type CgroupConfig struct { // Fully qualified name Name string // ResourceParameters contains various cgroups settings to apply. ResourceParameters *ResourceConfig }
CgroupConfig holds the cgroup configuration information. This is common object which is used to specify cgroup information to both systemd and raw cgroup fs implementation of the Cgroup Manager interface.
type CgroupManager ¶ added in v1.4.2
type CgroupManager interface { // Create creates and applies the cgroup configurations on the cgroup. // It just creates the leaf cgroups. // It expects the parent cgroup to already exist. Create(*CgroupConfig) error // Destroys the cgroup. Destroy(*CgroupConfig) error // Update cgroup configuration. Update(*CgroupConfig) error // Exists checks if the cgroup already exists Exists(string) bool }
CgroupManager allows for cgroup management. Supports Cgroup Creation ,Deletion and Updates.
func NewCgroupManager ¶ added in v1.4.2
func NewCgroupManager(cs *cgroupSubsystems) CgroupManager
NewCgroupManager is a factory method that returns a CgroupManager
type ContainerManager ¶
type ContainerManager interface { // Runs the container manager's housekeeping. // - Ensures that the Docker daemon is in a container. // - Creates the system container where all non-containerized processes run. Start() error // Returns resources allocated to system cgroups in the machine. // These cgroups include the system and Kubernetes services. SystemCgroupsLimit() api.ResourceList // Returns a NodeConfig that is being used by the container manager. GetNodeConfig() NodeConfig // Returns internal Status. Status() Status }
Manages the containers running on a machine.
func NewContainerManager ¶
func NewContainerManager(mountUtil mount.Interface, cadvisorInterface cadvisor.Interface, nodeConfig NodeConfig) (ContainerManager, error)
TODO(vmarmol): Add limits to the system containers. Takes the absolute name of the specified containers. Empty container name disables use of the specified container.
func NewStubContainerManager ¶
func NewStubContainerManager() ContainerManager
type KernelTunableBehavior ¶
type KernelTunableBehavior string
TODO: plumb this up as a flag to Kubelet in a future PR
const ( KernelTunableWarn KernelTunableBehavior = "warn" KernelTunableError KernelTunableBehavior = "error" KernelTunableModify KernelTunableBehavior = "modify" )
type NodeConfig ¶
type QOSContainersInfo ¶ added in v1.4.2
QOSContainersInfo hold the names of containers per qos
func InitQOS ¶ added in v1.4.2
func InitQOS(rootContainer string, subsystems *cgroupSubsystems) (QOSContainersInfo, error)
InitQOS creates the top level qos cgroup containers We create top level QoS containers for only Burstable and Best Effort and not Guaranteed QoS class. All guaranteed pods are nested under the RootContainer by default. InitQOS is called only once during kubelet bootstrapping. TODO(@dubstack) Add support for cgroup-root to work on both systemd and cgroupfs drivers. Currently we only support systems running cgroupfs driver
type ResourceConfig ¶ added in v1.4.2
type ResourceConfig struct { // Memory limit (in bytes). Memory *int64 CpuShares *int64 // CPU hardcap limit (in usecs). Allowed cpu time in a given period. CpuQuota *int64 }
ResourceConfig holds information about all the supported cgroup resource parameters.