/
client.go
137 lines (119 loc) · 3.45 KB
/
client.go
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// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: 2023 Steadybit GmbH
package crio
import (
"context"
"encoding/json"
"errors"
"fmt"
"github.com/steadybit/extension-container/extcontainer/container/types"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
criapi "k8s.io/cri-api/pkg/apis/runtime/v1"
"net"
"time"
)
type client struct {
cri criapi.RuntimeServiceClient
connection *grpc.ClientConn
}
func (c *client) Socket() string {
return c.connection.Target()
}
func (c *client) Runtime() types.Runtime {
return types.RuntimeCrio
}
func New(socket string) (types.Client, error) {
connection, err := newConnection(socket)
if err != nil {
return nil, fmt.Errorf("failed to connect to cri socket: %w", err)
}
criClient := criapi.NewRuntimeServiceClient(connection)
return &client{criClient, connection}, nil
}
func newConnection(socket string) (*grpc.ClientConn, error) {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
conn, err := grpc.DialContext(ctx,
socket,
grpc.WithBlock(),
grpc.WithTransportCredentials(insecure.NewCredentials()),
grpc.FailOnNonTempDialError(true),
grpc.WithContextDialer(dialer),
grpc.WithReturnConnectionError(),
)
return conn, err
}
func dialer(ctx context.Context, addr string) (net.Conn, error) {
if deadline, ok := ctx.Deadline(); ok {
return net.DialTimeout("unix", addr, time.Until(deadline))
}
return net.DialTimeout("unix", addr, 0)
}
func (c *client) List(ctx context.Context) ([]types.Container, error) {
containerList, err := c.cri.ListContainers(ctx, &criapi.ListContainersRequest{
Filter: &criapi.ContainerFilter{
State: &criapi.ContainerStateValue{
State: criapi.ContainerState_CONTAINER_RUNNING,
},
},
})
if err != nil {
return nil, fmt.Errorf("failed to list CRI-O containers: %w", err)
}
result := make([]types.Container, 0, len(containerList.Containers))
for _, container := range containerList.Containers {
result = append(result, &Container{container})
}
return result, nil
}
func (c *client) GetPid(ctx context.Context, containerId string) (int, error) {
res, err := c.cri.ContainerStatus(ctx, &criapi.ContainerStatusRequest{
ContainerId: containerId,
Verbose: true,
})
if err != nil {
return 0, fmt.Errorf("failed to get container status: %w", err)
}
var info struct {
Pid int `json:"pid"`
}
err = json.Unmarshal([]byte(res.GetInfo()["info"]), &info)
if err != nil {
return 0, fmt.Errorf("failed to read pid form container verbose info: %w", err)
}
if info.Pid == 0 {
return 0, errors.New("failed to read pid form container verbose info")
}
return info.Pid, nil
}
func (c *client) Pause(_ context.Context, _ string) error {
return fmt.Errorf("not supported")
}
func (c *client) Unpause(_ context.Context, _ string) error {
return fmt.Errorf("not supported")
}
func (c *client) Stop(ctx context.Context, id string, graceful bool) error {
timeout := 10
if !graceful {
timeout = 0
}
_, err := c.cri.StopContainer(ctx, &criapi.StopContainerRequest{
ContainerId: id,
Timeout: int64(timeout),
})
if err != nil {
return fmt.Errorf("failed to stop CRI-O container %s: %w", id, err)
}
return nil
}
func (c *client) Version(ctx context.Context) (string, error) {
versionResponse, err := c.cri.Version(ctx, &criapi.VersionRequest{})
if err != nil {
return "", err
}
return versionResponse.RuntimeVersion, nil
}
func (c *client) Close() error {
return c.connection.Close()
}