2019-11-02 13:25:10 +00:00
|
|
|
package client
|
|
|
|
|
|
|
|
import (
|
|
|
|
"crypto/tls"
|
|
|
|
"errors"
|
|
|
|
"io/ioutil"
|
|
|
|
"net/http"
|
|
|
|
"os"
|
|
|
|
"path"
|
|
|
|
|
|
|
|
"github.com/micro/go-micro/runtime/kubernetes/client/api"
|
|
|
|
"github.com/micro/go-micro/util/log"
|
|
|
|
)
|
|
|
|
|
|
|
|
var (
|
|
|
|
serviceAccountPath = "/var/run/secrets/kubernetes.io/serviceaccount"
|
|
|
|
// ErrReadNamespace is returned when the names could not be read from service account
|
|
|
|
ErrReadNamespace = errors.New("Could not read namespace from service account secret")
|
|
|
|
)
|
|
|
|
|
|
|
|
// Client ...
|
|
|
|
type client struct {
|
|
|
|
opts *api.Options
|
|
|
|
}
|
|
|
|
|
|
|
|
// NewClientInCluster should work similarily to the official api
|
|
|
|
// NewInClient by setting up a client configuration for use within
|
|
|
|
// a k8s pod.
|
|
|
|
func NewClientInCluster() *client {
|
|
|
|
host := "https://" + os.Getenv("KUBERNETES_SERVICE_HOST") + ":" + os.Getenv("KUBERNETES_SERVICE_PORT")
|
|
|
|
|
|
|
|
s, err := os.Stat(serviceAccountPath)
|
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
|
|
|
if s == nil || !s.IsDir() {
|
|
|
|
log.Fatal(errors.New("no k8s service account found"))
|
|
|
|
}
|
|
|
|
|
|
|
|
token, err := ioutil.ReadFile(path.Join(serviceAccountPath, "token"))
|
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
|
|
|
t := string(token)
|
|
|
|
|
|
|
|
ns, err := detectNamespace()
|
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
|
|
|
|
|
|
|
crt, err := CertPoolFromFile(path.Join(serviceAccountPath, "ca.crt"))
|
|
|
|
if err != nil {
|
|
|
|
log.Fatal(err)
|
|
|
|
}
|
|
|
|
|
|
|
|
c := &http.Client{
|
|
|
|
Transport: &http.Transport{
|
|
|
|
TLSClientConfig: &tls.Config{
|
|
|
|
RootCAs: crt,
|
|
|
|
},
|
|
|
|
DisableCompression: true,
|
|
|
|
},
|
|
|
|
}
|
|
|
|
|
|
|
|
return &client{
|
|
|
|
opts: &api.Options{
|
|
|
|
Client: c,
|
|
|
|
Host: host,
|
|
|
|
Namespace: ns,
|
|
|
|
BearerToken: &t,
|
|
|
|
},
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func detectNamespace() (string, error) {
|
|
|
|
nsPath := path.Join(serviceAccountPath, "namespace")
|
|
|
|
|
|
|
|
// Make sure it's a file and we can read it
|
|
|
|
if s, e := os.Stat(nsPath); e != nil {
|
|
|
|
return "", e
|
|
|
|
} else if s.IsDir() {
|
|
|
|
return "", ErrReadNamespace
|
|
|
|
}
|
|
|
|
|
|
|
|
// Read the file, and cast to a string
|
|
|
|
if ns, e := ioutil.ReadFile(nsPath); e != nil {
|
|
|
|
return string(ns), e
|
|
|
|
} else {
|
|
|
|
return string(ns), nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-11-07 07:44:57 +00:00
|
|
|
// UpdateDeployment patches kubernetes deployment with metadata provided in body
|
2019-11-02 13:25:10 +00:00
|
|
|
func (c *client) UpdateDeployment(name string, body interface{}) error {
|
|
|
|
return api.NewRequest(c.opts).
|
|
|
|
Patch().
|
|
|
|
Resource("deployments").
|
|
|
|
Name(name).
|
|
|
|
Body(body).
|
|
|
|
Do().
|
|
|
|
Error()
|
|
|
|
}
|
2019-11-07 07:44:57 +00:00
|
|
|
|
|
|
|
// ListDeployments lists all kubernetes deployments with given labels
|
|
|
|
func (c *client) ListDeployments(labels map[string]string) (*DeploymentList, error) {
|
|
|
|
var deployments DeploymentList
|
|
|
|
err := api.NewRequest(c.opts).
|
|
|
|
Get().
|
|
|
|
Resource("deployments").
|
|
|
|
Params(&api.Params{LabelSelector: labels}).
|
|
|
|
Do().
|
|
|
|
Into(&deployments)
|
|
|
|
|
|
|
|
return &deployments, err
|
|
|
|
}
|