dcb905701c
Adds retry support to AnonDialer if the pipe does not exist. This will retry up to the timeout for the pipe to exist and connect. This solves the race between the containerd-shim-* start command and the reinvocation. Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package shim
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import (
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"context"
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"fmt"
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"net"
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"os"
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"syscall"
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"time"
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winio "github.com/Microsoft/go-winio"
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"github.com/containerd/containerd/namespaces"
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"github.com/pkg/errors"
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)
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func getSysProcAttr() *syscall.SysProcAttr {
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return nil
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}
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// SetScore sets the oom score for a process
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func SetScore(pid int) error {
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return nil
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}
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// SocketAddress returns a npipe address
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func SocketAddress(ctx context.Context, id string) (string, error) {
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ns, err := namespaces.NamespaceRequired(ctx)
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("\\\\.\\pipe\\containerd-shim-%s-%s-pipe", ns, id), nil
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}
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// AnonDialer returns a dialer for a npipe
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func AnonDialer(address string, timeout time.Duration) (net.Conn, error) {
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var c net.Conn
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var lastError error
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start := time.Now()
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for {
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remaining := timeout - time.Now().Sub(start)
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if remaining <= 0 {
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lastError = errors.Errorf("timed out waiting for npipe %s", address)
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break
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}
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c, lastError = winio.DialPipe(address, &remaining)
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if lastError == nil {
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break
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}
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if !os.IsNotExist(lastError) {
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break
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}
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time.Sleep(10 * time.Millisecond)
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}
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return c, lastError
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}
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// NewSocket returns a new npipe listener
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func NewSocket(address string) (net.Listener, error) {
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l, err := winio.ListenPipe(address, nil)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to listen to npipe %s", address)
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}
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return l, nil
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}
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