122 lines
4.3 KiB
Go
122 lines
4.3 KiB
Go
// This file is part of MinIO Kubernetes Cloud
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// Copyright (c) 2021 MinIO, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cluster
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"regexp"
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"strings"
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"time"
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"github.com/minio/pkg/env"
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)
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var (
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errCantDetermineMinIOImage = errors.New("can't determine MinIO Image")
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)
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func GetK8sAPIServer() string {
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// if console is running inside a k8s pod KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT will contain the k8s api server apiServerAddress
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// if console is not running inside k8s by default will look for the k8s api server on localhost:8001 (kubectl proxy)
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// NOTE: using kubectl proxy is for local development only, since every request send to localhost:8001 will bypass service account authentication
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// more info here: https://kubernetes.io/docs/tasks/access-application-cluster/access-cluster/#directly-accessing-the-rest-api
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// you can override this using CONSOLE_K8S_API_SERVER, ie use the k8s cluster from `kubectl config view`
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host, port := env.Get("KUBERNETES_SERVICE_HOST", ""), env.Get("KUBERNETES_SERVICE_PORT", "")
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apiServerAddress := "http://localhost:8001"
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if host != "" && port != "" {
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apiServerAddress = "https://" + net.JoinHostPort(host, port)
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}
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return env.Get(ConsoleK8sAPIServer, apiServerAddress)
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}
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// If CONSOLE_K8S_API_SERVER_TLS_ROOT_CA is true console will load the certificate into the
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// http.client rootCAs pool, this is useful for testing an k8s ApiServer or when working with self-signed certificates
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func getK8sAPIServerTLSRootCA() string {
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return strings.TrimSpace(env.Get(ConsoleK8SAPIServerTLSRootCA, ""))
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}
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// GetNsFromFile assumes console is running inside a k8s pod and extract the current namespace from the
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// /var/run/secrets/kubernetes.io/serviceaccount/namespace file
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func GetNsFromFile() string {
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dat, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace")
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if err != nil {
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return "default"
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}
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return string(dat)
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}
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// Namespace will run only once at console startup
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var Namespace = GetNsFromFile()
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// getLatestMinIOImage returns the latest docker image for MinIO if found on the internet
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func getLatestMinIOImage(client HTTPClientI) (*string, error) {
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resp, err := client.Get("https://dl.min.io/server/minio/release/linux-amd64/")
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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var re = regexp.MustCompile(`(?m)\.\/minio\.(RELEASE.*?Z)"`)
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// look for a single match
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matches := re.FindAllStringSubmatch(string(body), 1)
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for i := range matches {
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release := matches[i][1]
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dockerImage := fmt.Sprintf("minio/minio:%s", release)
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return &dockerImage, nil
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}
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return nil, errCantDetermineMinIOImage
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}
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var latestMinIOImage, errLatestMinIOImage = getLatestMinIOImage(
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&HTTPClient{
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Client: &http.Client{
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Timeout: 15 * time.Second,
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},
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})
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// GetMinioImage returns the image URL to be used when deploying a MinIO instance, if there is
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// a preferred image to be used (configured via ENVIRONMENT VARIABLES) GetMinioImage will return that
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// if not, GetMinioImage will try to obtain the image URL for the latest version of MinIO and return that
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func GetMinioImage() (*string, error) {
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image := strings.TrimSpace(env.Get(ConsoleMinioImage, ""))
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// if there is a preferred image configured by the user we'll always return that
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if image != "" {
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return &image, nil
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}
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if errLatestMinIOImage != nil {
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return nil, errLatestMinIOImage
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}
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return latestMinIOImage, nil
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}
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// GetLatestMinioImage returns the latest image URL on minio repository
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func GetLatestMinioImage(client HTTPClientI) (*string, error) {
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latestMinIOImage, err := getLatestMinIOImage(client)
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if err != nil {
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return nil, err
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}
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return latestMinIOImage, nil
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}
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