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103 lines
3.3 KiB
103 lines
3.3 KiB
/*
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Copyright © 2020-2022 The k3d Author(s)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package docker
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import (
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"fmt"
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"net"
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"net/url"
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"os"
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l "github.com/k3d-io/k3d/v5/pkg/logger"
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)
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type Docker struct{}
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const (
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DefaultDockerSock = "/var/run/docker.sock"
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)
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// ID returns the identity of the runtime
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func (d Docker) ID() string {
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return "docker"
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}
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// GetHost returns the docker daemon host
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func (d Docker) GetHost() string {
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// a) docker-machine
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machineIP, err := d.GetDockerMachineIP()
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if err != nil {
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l.Log().Warnf("[Docker] Using docker-machine, but failed to get it's IP: %+v", err)
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} else if machineIP != "" {
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l.Log().Infof("[Docker] Using the docker-machine IP %s to connect to the Kubernetes API", machineIP)
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return machineIP
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} else {
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l.Log().Traceln("[Docker] Not using docker-machine")
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}
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// b) DOCKER_HOST env var
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dockerHost := os.Getenv("DOCKER_HOST")
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if dockerHost == "" {
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l.Log().Traceln("[Docker] GetHost: DOCKER_HOST empty/unset")
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info, err := d.Info()
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if err != nil {
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l.Log().Errorf("[Docker] error getting runtime information: %v", err)
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return ""
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}
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// c) Docker for Desktop (Win/Mac) and it's a local connection
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if IsDockerDesktop(info.OS) && IsLocalConnection(info.Endpoint) {
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// c.1) local DfD connection, but inside WSL, where host.docker.internal resolves to an IP, but it's not reachable
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if _, ok := os.LookupEnv("WSL_DISTRO_NAME"); ok {
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l.Log().Debugln("[Docker] wanted to use 'host.docker.internal' as docker host, but it's not reachable in WSL2")
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return ""
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}
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l.Log().Debugln("[Docker] Local DfD: using 'host.docker.internal'")
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dfdHost := "host.docker.internal"
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if _, err := net.LookupHost(dfdHost); err != nil {
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l.Log().Debugf("[Docker] wanted to use 'host.docker.internal' as docker host, but it's not resolvable locally: %v", err)
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return ""
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}
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dockerHost = fmt.Sprintf("tcp://%s", dfdHost)
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}
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}
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url, err := url.Parse(dockerHost)
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if err != nil {
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l.Log().Debugf("[Docker] GetHost: error parsing '%s' as URL: %#v", dockerHost, url)
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return ""
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}
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dockerHost = url.Host
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l.Log().Debugf("[Docker] DockerHost: '%s' (%+v)", dockerHost, url)
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return dockerHost
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}
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// GetRuntimePath returns the path of the docker socket
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func (d Docker) GetRuntimePath() string {
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dockerSock := os.Getenv("DOCKER_SOCK")
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if dockerSock == "" {
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dockerSock = DefaultDockerSock
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}
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l.Log().Debugf("DOCKER_SOCK=%s", dockerSock)
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return dockerSock
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}
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