containerd/pkg/cri/sbserver/sandbox_status.go

/*
   Copyright The containerd Authors.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

package sbserver

import (
	"context"
	"fmt"
	"time"

	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
)

// PodSandboxStatus returns the status of the PodSandbox.
func (c *criService) PodSandboxStatus(ctx context.Context, r *runtime.PodSandboxStatusRequest) (*runtime.PodSandboxStatusResponse, error) {
	sandbox, err := c.sandboxStore.Get(r.GetPodSandboxId())
	if err != nil {
		return nil, fmt.Errorf("an error occurred when try to find sandbox: %w", err)
	}

	ip, additionalIPs, err := c.getIPs(sandbox)
	if err != nil {
		return nil, fmt.Errorf("failed to get sandbox ip: %w", err)
	}

	controller, err := c.getSandboxController(sandbox.Config, sandbox.RuntimeHandler)
	if err != nil {
		return nil, fmt.Errorf("failed to get sandbox controller: %w", err)
	}

	statusResponse, err := controller.Status(ctx, sandbox.ID, r.GetVerbose())
	if err != nil {
		return nil, fmt.Errorf("failed to query controller status: %w", err)
	}

	status := toCRISandboxStatus(sandbox.Metadata, statusResponse.State, statusResponse.GetCreatedAt().AsTime(), ip, additionalIPs)
	if status.GetCreatedAt() == 0 {
		// CRI doesn't allow CreatedAt == 0.
		sandboxInfo, err := c.client.SandboxStore().Get(ctx, r.GetPodSandboxId())
		if err != nil {
			return nil, fmt.Errorf("failed to get sandbox %q from metadata store: %w", r.GetPodSandboxId(), err)
		}
		status.CreatedAt = sandboxInfo.CreatedAt.UnixNano()
	}

	return &runtime.PodSandboxStatusResponse{
		Status: status,
		Info:   statusResponse.GetInfo(),
	}, nil
}

func (c *criService) getIPs(sandbox sandboxstore.Sandbox) (string, []string, error) {
	config := sandbox.Config

	// For sandboxes using the node network we are not
	// responsible for reporting the IP.
	if hostNetwork(config) {
		return "", nil, nil
	}

	if closed, err := sandbox.NetNS.Closed(); err != nil {
		return "", nil, fmt.Errorf("check network namespace closed: %w", err)
	} else if closed {
		return "", nil, nil
	}

	return sandbox.IP, sandbox.AdditionalIPs, nil
}

// toCRISandboxStatus converts sandbox metadata into CRI pod sandbox status.
func toCRISandboxStatus(meta sandboxstore.Metadata, status string, createdAt time.Time, ip string, additionalIPs []string) *runtime.PodSandboxStatus {
	// Set sandbox state to NOTREADY by default.
	state := runtime.PodSandboxState_SANDBOX_NOTREADY
	if value, ok := runtime.PodSandboxState_value[status]; ok {
		state = runtime.PodSandboxState(value)
	}
	nsOpts := meta.Config.GetLinux().GetSecurityContext().GetNamespaceOptions()
	var ips []*runtime.PodIP
	for _, additionalIP := range additionalIPs {
		ips = append(ips, &runtime.PodIP{Ip: additionalIP})
	}
	return &runtime.PodSandboxStatus{
		Id:        meta.ID,
		Metadata:  meta.Config.GetMetadata(),
		State:     state,
		CreatedAt: createdAt.UnixNano(),
		Network: &runtime.PodSandboxNetworkStatus{
			Ip:            ip,
			AdditionalIps: ips,
		},
		Linux: &runtime.LinuxPodSandboxStatus{
			Namespaces: &runtime.Namespace{
				Options: &runtime.NamespaceOption{
					Network: nsOpts.GetNetwork(),
					Pid:     nsOpts.GetPid(),
					Ipc:     nsOpts.GetIpc(),
				},
			},
		},
		Labels:         meta.Config.GetLabels(),
		Annotations:    meta.Config.GetAnnotations(),
		RuntimeHandler: meta.RuntimeHandler,
	}
}