bbe46b8c43
Signed-off-by: haoyun <yun.hao@daocloud.io> Co-authored-by: zounengren <zouyee1989@gmail.com>
121 lines
2.7 KiB
Go
121 lines
2.7 KiB
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 ttrpcutil
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
v1 "github.com/containerd/containerd/api/services/ttrpc/events/v1"
|
|
"github.com/containerd/containerd/pkg/dialer"
|
|
"github.com/containerd/ttrpc"
|
|
)
|
|
|
|
const ttrpcDialTimeout = 5 * time.Second
|
|
|
|
type ttrpcConnector func() (*ttrpc.Client, error)
|
|
|
|
// Client is the client to interact with TTRPC part of containerd server (plugins, events)
|
|
type Client struct {
|
|
mu sync.Mutex
|
|
connector ttrpcConnector
|
|
client *ttrpc.Client
|
|
closed bool
|
|
}
|
|
|
|
// NewClient returns a new containerd TTRPC client that is connected to the containerd instance provided by address
|
|
func NewClient(address string, opts ...ttrpc.ClientOpts) (*Client, error) {
|
|
connector := func() (*ttrpc.Client, error) {
|
|
conn, err := dialer.Dialer(address, ttrpcDialTimeout)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to connect: %w", err)
|
|
}
|
|
|
|
client := ttrpc.NewClient(conn, opts...)
|
|
return client, nil
|
|
}
|
|
|
|
return &Client{
|
|
connector: connector,
|
|
}, nil
|
|
}
|
|
|
|
// Reconnect re-establishes the TTRPC connection to the containerd daemon
|
|
func (c *Client) Reconnect() error {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
|
|
if c.connector == nil {
|
|
return errors.New("unable to reconnect to containerd, no connector available")
|
|
}
|
|
|
|
if c.closed {
|
|
return errors.New("client is closed")
|
|
}
|
|
|
|
if c.client != nil {
|
|
if err := c.client.Close(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
client, err := c.connector()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
c.client = client
|
|
return nil
|
|
}
|
|
|
|
// EventsService creates an EventsService client
|
|
func (c *Client) EventsService() (v1.EventsService, error) {
|
|
client, err := c.Client()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return v1.NewEventsClient(client), nil
|
|
}
|
|
|
|
// Client returns the underlying TTRPC client object
|
|
func (c *Client) Client() (*ttrpc.Client, error) {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
if c.client == nil {
|
|
client, err := c.connector()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
c.client = client
|
|
}
|
|
return c.client, nil
|
|
}
|
|
|
|
// Close closes the clients TTRPC connection to containerd
|
|
func (c *Client) Close() error {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
|
|
c.closed = true
|
|
if c.client != nil {
|
|
return c.client.Close()
|
|
}
|
|
return nil
|
|
}
|