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6b65b0c982
Tested with `kind` and GKE. Note: "nodes" shown in `docker buildx ls` are unrelated to Kubernetes "nodes". Probably buildx should come up with an alternative term. Usage: $ kind create cluster $ export KUBECONFIG="$(kind get kubeconfig-path --name="kind")" $ docker buildx create --driver kubernetes --driver-opt replicas=3 --use $ docker buildx build -t foo --load . `--load` loads the image into the local Docker. Driver opts: - `image=IMAGE` - Sets the container image to be used for running buildkit. - `namespace=NS` - Sets the Kubernetes namespace. Defaults to the current namespace. - `replicas=N` - Sets the number of `Pod` replicas. Defaults to 1. - `rootless=(true|false)` - Run the container as a non-root user without `securityContext.privileged`. Defaults to false. - `loadbalance=(sticky|random)` - Load-balancing strategy. If set to "sticky", the pod is chosen using the hash of the context path. Defaults to "sticky" Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
// Copyright 2014 Google Inc. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package internal
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// This file implements a network dialer that limits the number of concurrent connections.
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// It is only used for API calls.
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import (
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"log"
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"net"
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"runtime"
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"sync"
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"time"
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)
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var limitSem = make(chan int, 100) // TODO(dsymonds): Use environment variable.
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func limitRelease() {
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// non-blocking
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select {
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case <-limitSem:
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default:
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// This should not normally happen.
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log.Print("appengine: unbalanced limitSem release!")
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}
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}
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func limitDial(network, addr string) (net.Conn, error) {
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limitSem <- 1
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// Dial with a timeout in case the API host is MIA.
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// The connection should normally be very fast.
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conn, err := net.DialTimeout(network, addr, 500*time.Millisecond)
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if err != nil {
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limitRelease()
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return nil, err
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}
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lc := &limitConn{Conn: conn}
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runtime.SetFinalizer(lc, (*limitConn).Close) // shouldn't usually be required
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return lc, nil
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}
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type limitConn struct {
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close sync.Once
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net.Conn
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}
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func (lc *limitConn) Close() error {
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defer lc.close.Do(func() {
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limitRelease()
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runtime.SetFinalizer(lc, nil)
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})
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return lc.Conn.Close()
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}
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