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https://github.com/containers/podman.git
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2792e598c7
currently, setting any sort of resource limit in a pod does nothing. With the newly refactored creation process in c/common, podman ca now set resources at a pod level meaning that resource related flags can now be exposed to podman pod create. cgroupfs and systemd are both supported with varying completion. cgroupfs is a much simpler process and one that is virtually complete for all resource types, the flags now just need to be added. systemd on the other hand has to be handeled via the dbus api meaning that the limits need to be passed as recognized properties to systemd. The properties added so far are the ones that podman pod create supports as well as `cpuset-mems` as this will be the next flag I work on. Signed-off-by: Charlie Doern <cdoern@redhat.com>
75 lines
2.3 KiB
Go
75 lines
2.3 KiB
Go
package cgroups
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import (
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"errors"
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"github.com/opencontainers/runc/libcontainer/configs"
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)
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var (
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// ErrDevicesUnsupported is an error returned when a cgroup manager
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// is not configured to set device rules.
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ErrDevicesUnsupported = errors.New("cgroup manager is not configured to set device rules")
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// DevicesSetV1 and DevicesSetV2 are functions to set devices for
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// cgroup v1 and v2, respectively. Unless libcontainer/cgroups/devices
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// package is imported, it is set to nil, so cgroup managers can't
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// manage devices.
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DevicesSetV1 func(path string, r *configs.Resources) error
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DevicesSetV2 func(path string, r *configs.Resources) error
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)
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type Manager interface {
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// Apply creates a cgroup, if not yet created, and adds a process
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// with the specified pid into that cgroup. A special value of -1
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// can be used to merely create a cgroup.
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Apply(pid int) error
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// GetPids returns the PIDs of all processes inside the cgroup.
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GetPids() ([]int, error)
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// GetAllPids returns the PIDs of all processes inside the cgroup
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// any all its sub-cgroups.
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GetAllPids() ([]int, error)
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// GetStats returns cgroups statistics.
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GetStats() (*Stats, error)
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// Freeze sets the freezer cgroup to the specified state.
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Freeze(state configs.FreezerState) error
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// Destroy removes cgroup.
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Destroy() error
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// Path returns a cgroup path to the specified controller/subsystem.
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// For cgroupv2, the argument is unused and can be empty.
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Path(string) string
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// Set sets cgroup resources parameters/limits. If the argument is nil,
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// the resources specified during Manager creation (or the previous call
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// to Set) are used.
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Set(r *configs.Resources) error
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// GetPaths returns cgroup path(s) to save in a state file in order to
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// restore later.
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//
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// For cgroup v1, a key is cgroup subsystem name, and the value is the
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// path to the cgroup for this subsystem.
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//
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// For cgroup v2 unified hierarchy, a key is "", and the value is the
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// unified path.
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GetPaths() map[string]string
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// GetCgroups returns the cgroup data as configured.
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GetCgroups() (*configs.Cgroup, error)
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// GetFreezerState retrieves the current FreezerState of the cgroup.
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GetFreezerState() (configs.FreezerState, error)
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// Exists returns whether the cgroup path exists or not.
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Exists() bool
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// OOMKillCount reports OOM kill count for the cgroup.
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OOMKillCount() (uint64, error)
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}
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