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cluster.go
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cluster.go
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// Copyright (c) 2016 Pulcy.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"io/ioutil"
"os"
"github.com/spf13/cobra"
fg "github.com/pulcy/j2/flags"
)
var (
clusterCmd = &cobra.Command{
Use: "cluster",
Short: "Cluster commands.",
Run: func(cmd *cobra.Command, args []string) { cmd.Usage() },
}
clusterConfigCmd = &cobra.Command{
Use: "configure",
Short: "Prepare a cluster for use by J2 jobs",
Run: configureClusterRun,
}
clusterFlags struct {
fg.Flags
clusterID string
vaultAddress string
vaultCACertPath string
}
)
func init() {
initDeploymentFlags(clusterConfigCmd.Flags(), &clusterFlags.Flags)
fs := clusterConfigCmd.Flags()
defaultVaultAddress := os.Getenv("VAULT_ADDR")
defaultVaultCACertPath := os.Getenv("VAULT_CACERT")
fs.StringVar(&clusterFlags.clusterID, "cluster-id", "", "ID of the cluster")
fs.StringVar(&clusterFlags.vaultAddress, "vault-address", defaultVaultAddress, "URL of Vault server")
fs.StringVar(&clusterFlags.vaultCACertPath, "vault-cacert-path", defaultVaultCACertPath, "Path of file containing Vault CA certificate")
cmdMain.AddCommand(clusterCmd)
clusterCmd.AddCommand(clusterConfigCmd)
}
func configureClusterRun(cmd *cobra.Command, args []string) {
if clusterFlags.vaultAddress == "" {
Exitf("--vault-address missing")
}
if clusterFlags.vaultCACertPath == "" {
Exitf("--vault-cacert-path missing")
}
deploymentDefaults(cmd.Flags(), &clusterFlags.Flags, args)
runValidators(&clusterFlags.Flags)
cluster, err := loadCluster(&clusterFlags.Flags)
if err != nil {
Exitf("Cannot load cluster: %v\n", err)
}
orchestrator, err := getOrchestrator(cluster)
if err != nil {
Exitf("Cannot initialize orchestrator: %v\n", err)
}
job, err := loadJob(&clusterFlags.Flags, *cluster, orchestrator)
if err != nil {
Exitf("Cannot load job: %v\n", err)
}
scheduler, err := orchestrator.Scheduler(*job, *cluster)
if err != nil {
Exitf("Cannot load scheduler: %v\n", err)
}
if err := scheduler.ConfigureCluster(&clusterConfig{}); err != nil {
Exitf("Failed to configure cliuster: %#v\n", err)
}
}
type clusterConfig struct{}
func (c *clusterConfig) ClusterID() string {
return clusterFlags.clusterID
}
func (c *clusterConfig) VaultAddress() string {
return clusterFlags.vaultAddress
}
func (c *clusterConfig) VaultCACert() string {
raw, err := ioutil.ReadFile(clusterFlags.vaultCACertPath)
if err != nil {
Exitf("Failed to read %s: %#v\n", clusterFlags.vaultCACertPath, err)
}
return string(raw)
}
func (c *clusterConfig) VaultCAPath() string {
return ""
}