mirror of
https://github.com/docker/compose.git
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92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
/*
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Copyright 2020 Docker Compose CLI 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 store
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import (
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"bytes"
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"encoding/json"
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"os/exec"
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"github.com/pkg/errors"
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)
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// Represents a context as created by the docker cli
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type defaultContext struct {
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Metadata ContextMetadata
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Endpoints endpoints
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}
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// Normally (in docker/cli code), the endpoints are mapped as map[string]interface{}
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// but docker cli contexts always have a "docker" and "kubernetes" key so we
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// create real types for those to no have to juggle around with interfaces.
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type endpoints struct {
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Docker endpoint `json:"docker,omitempty"`
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Kubernetes endpoint `json:"kubernetes,omitempty"`
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}
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// Both "docker" and "kubernetes" endpoints in the docker cli created contexts
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// have a "Host", only kubernetes has the "DefaultNamespace", we put both of
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// those here for easier manipulation and to not have to create two distinct
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// structs
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type endpoint struct {
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Host string
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DefaultNamespace string
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}
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func dockerDefaultContext() (*DockerContext, error) {
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// ensure we run this using default context, in current context has been damaged / removed in store
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cmd := exec.Command("com.docker.cli", "--context", "default", "context", "inspect", "default")
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var stdout bytes.Buffer
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cmd.Stdout = &stdout
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err := cmd.Run()
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if err != nil {
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return nil, err
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}
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var ctx []defaultContext
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err = json.Unmarshal(stdout.Bytes(), &ctx)
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if err != nil {
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return nil, err
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}
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if len(ctx) != 1 {
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return nil, errors.New("found more than one default context")
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}
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defaultCtx := ctx[0]
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meta := DockerContext{
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Name: "default",
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Endpoints: map[string]interface{}{
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"docker": &Endpoint{
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Host: defaultCtx.Endpoints.Docker.Host,
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},
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"kubernetes": &Endpoint{
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Host: defaultCtx.Endpoints.Kubernetes.Host,
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DefaultNamespace: defaultCtx.Endpoints.Kubernetes.DefaultNamespace,
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},
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},
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Metadata: ContextMetadata{
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Type: DefaultContextType,
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Description: "Current DOCKER_HOST based configuration",
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StackOrchestrator: defaultCtx.Metadata.StackOrchestrator,
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},
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}
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return &meta, nil
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}
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