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In dockerd we already have a concept of a "runtime", which specifies the OCI runtime to use (e.g. runc). This PR extends that config to add containerd shim configuration. This option is only exposed within the daemon itself (cannot be configured in daemon.json). This is due to issues in supporting unknown shims which will require more design work. What this change allows us to do is keep all the runtime config in one place. So the default "runc" runtime will just have it's already existing shim config codified within the runtime config alone. I've also added 2 more "stock" runtimes which are basically runc+shimv1 and runc+shimv2. These new runtime configurations are: - io.containerd.runtime.v1.linux - runc + v1 shim using the V1 shim API - io.containerd.runc.v2 - runc + shim v2 These names coincide with the actual names of the containerd shims. This allows the user to essentially control what shim is going to be used by either specifying these as a `--runtime` on container create or by setting `--default-runtime` on the daemon. For custom/user-specified runtimes, the default shim config (currently shim v1) is used. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
78 lines
3 KiB
Go
78 lines
3 KiB
Go
package types // import "github.com/docker/docker/libcontainerd/types"
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import (
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"context"
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"time"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cio"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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// EventType represents a possible event from libcontainerd
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type EventType string
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// Event constants used when reporting events
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const (
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EventUnknown EventType = "unknown"
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EventExit EventType = "exit"
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EventOOM EventType = "oom"
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EventCreate EventType = "create"
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EventStart EventType = "start"
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EventExecAdded EventType = "exec-added"
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EventExecStarted EventType = "exec-started"
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EventPaused EventType = "paused"
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EventResumed EventType = "resumed"
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)
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// EventInfo contains the event info
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type EventInfo struct {
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ContainerID string
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ProcessID string
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Pid uint32
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ExitCode uint32
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ExitedAt time.Time
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OOMKilled bool
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Error error
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}
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// Backend defines callbacks that the client of the library needs to implement.
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type Backend interface {
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ProcessEvent(containerID string, event EventType, ei EventInfo) error
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}
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// Process of a container
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type Process interface {
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Delete(context.Context) (uint32, time.Time, error)
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}
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// Client provides access to containerd features.
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type Client interface {
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Version(ctx context.Context) (containerd.Version, error)
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Restore(ctx context.Context, containerID string, attachStdio StdioCallback) (alive bool, pid int, p Process, err error)
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Create(ctx context.Context, containerID string, spec *specs.Spec, shim string, runtimeOptions interface{}, opts ...containerd.NewContainerOpts) error
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Start(ctx context.Context, containerID, checkpointDir string, withStdin bool, attachStdio StdioCallback) (pid int, err error)
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SignalProcess(ctx context.Context, containerID, processID string, signal int) error
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Exec(ctx context.Context, containerID, processID string, spec *specs.Process, withStdin bool, attachStdio StdioCallback) (int, error)
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ResizeTerminal(ctx context.Context, containerID, processID string, width, height int) error
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CloseStdin(ctx context.Context, containerID, processID string) error
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Pause(ctx context.Context, containerID string) error
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Resume(ctx context.Context, containerID string) error
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Stats(ctx context.Context, containerID string) (*Stats, error)
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ListPids(ctx context.Context, containerID string) ([]uint32, error)
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Summary(ctx context.Context, containerID string) ([]Summary, error)
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DeleteTask(ctx context.Context, containerID string) (uint32, time.Time, error)
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Delete(ctx context.Context, containerID string) error
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Status(ctx context.Context, containerID string) (containerd.ProcessStatus, error)
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UpdateResources(ctx context.Context, containerID string, resources *Resources) error
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CreateCheckpoint(ctx context.Context, containerID, checkpointDir string, exit bool) error
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}
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// StdioCallback is called to connect a container or process stdio.
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type StdioCallback func(io *cio.DirectIO) (cio.IO, error)
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// InitProcessName is the name given to the first process of a container
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const InitProcessName = "init"
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