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11339761ca
Initially we stored the context data in the `Metadata` of the context
but in hindsight this data would be better of in the `Endpoints` because
that's what it is used for.
Before:
```json
{
"Name": "aci",
"Metadata": {
"Type": "aci",
"Data": {
"key": "value"
}
},
"Endpoints": {
"docker": {}
}
}
```
After:
```json
{
"Name": "aci",
"Type": "aci",
"Metadata": {},
"Endpoints": {
"aci": {
"key": "value"
},
"docker": {}
}
}
```
With this change the contexts that we create are more in line with the contexts the docker cli creates.
It also makes the code less complicated since we don't need to marsal twice any more. The API is nicer too:
```go
// Get a context:
c, err := store.Get(contextName)
// Get the stored endpoint:
var aciContext store.AciContext
if err := contextStore.GetEndpoint(currentContext, &aciContext); err != nil {
return nil, err
}
```
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
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() (*Metadata, error) {
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cmd := exec.Command("docker", "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 := Metadata{
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Name: "default",
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Type: "docker",
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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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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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