/
nodeinit.go
127 lines (109 loc) · 4.1 KB
/
nodeinit.go
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package cmd
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/Jeffail/gabs"
"github.com/platform9/nodeadm/pkg/kubeadm"
"github.com/platform9/nodeadm/apis"
"github.com/platform9/nodeadm/constants"
log "github.com/platform9/nodeadm/pkg/logrus"
"github.com/platform9/nodeadm/utils"
executil "github.com/platform9/nodeadm/utils/exec"
"github.com/spf13/cobra"
)
var (
initCfgPath string
)
// nodeCmd represents the cluster command
var nodeCmdInit = &cobra.Command{
Use: "init",
Short: "Initialize the master node with given configuration",
Run: func(cmd *cobra.Command, args []string) {
var err error
config := &apis.InitConfiguration{}
if initCfgPath != "" {
config, err = utils.InitConfigurationFromFile(initCfgPath)
if err != nil {
log.Fatalf("Failed to read configuration from file %q: %v", initCfgPath, err)
}
}
apis.SetInitDefaults(config)
if err := apis.SetInitDynamicDefaults(config); err != nil {
log.Fatalf("Failed to set dynamic defaults: %v", err)
}
if errors := apis.ValidateInit(config); len(errors) > 0 {
log.Error("Failed to validate configuration:")
for i, err := range errors {
log.Errorf("%v: %v", i, err)
}
os.Exit(1)
}
if err := kubeadm.WriteConfiguration(constants.KubeadmConfig, config.MasterConfiguration); err != nil {
log.Fatalf("Unable to write kubeadm configuration to %s: %s", constants.KubeadmConfig, err)
}
utils.InstallMasterComponents(config)
kubeadmInit(constants.KubeadmConfig)
log.Infoln("Applying workaround for https://github.com/kubernetes/kubeadm/issues/857")
if err := ensureKubeProxyRespectsHostoverride(); err != nil {
log.Fatalf("Failed to apply workaround: %v", err)
}
log.Println("Configuring pod network")
if err := networkInit(config); err != nil {
log.Fatalf("Unable to configure pod network: %s", err)
}
},
}
func networkInit(config *apis.InitConfiguration) error {
p, err := gabs.Consume(config.MasterConfiguration)
if err != nil {
return fmt.Errorf("unable to parse masterConfiguration: %s", err)
}
if !p.ExistsP("networking.podSubnet") {
return fmt.Errorf("masterConfiguration.networking.podSubnet must be defined")
}
podSubnet, ok := p.Path("networking.podSubnet").Data().(string)
if !ok {
return fmt.Errorf("masterConfiguration.networking.podSubnet must be a string")
}
log.Println("Setting net.bridge.bridge-nf-call-iptables=1")
cmd := exec.Command(constants.Sysctl, "net.bridge.bridge-nf-call-iptables=1")
if err := cmd.Run(); err != nil {
log.Fatalf("failed to run %q: %s", strings.Join(cmd.Args, " "), err)
}
log.Println("Applying flannel daemonset from disk")
manifest, err := ioutil.ReadFile(filepath.Join(constants.CacheDir, constants.FlannelDirName, constants.FlannelManifestFilename))
if err != nil {
log.Fatalf("failed to open network backend manifest (%q): %s", strings.Join(cmd.Args, " "), err)
}
log.Printf("Setting flannel net-conf.json Network to %s", podSubnet)
manifestWithPodSubnet := strings.Replace(string(manifest), constants.DefaultPodNetwork, podSubnet, -1)
cmd = exec.Command(filepath.Join(constants.BaseInstallDir, "kubectl"), fmt.Sprintf("--kubeconfig=%s", constants.AdminKubeconfigFile), "apply", "-f", "-")
cmd.Stdin = strings.NewReader(manifestWithPodSubnet)
err = cmd.Run()
if err != nil {
log.Fatalf("failed to run %q: %s", strings.Join(cmd.Args, " "), err)
}
log.Infoln("Applying workaround for https://github.com/coreos/flannel/issues/1044")
if err := ensureFlannelDaemonSetToleratesAllNoScheduleTaints(); err != nil {
log.Fatalf("Failed to apply workaround: %v", err)
}
return nil
}
func kubeadmInit(config string) {
cmd := exec.Command(filepath.Join(constants.BaseInstallDir, "kubeadm"), "init", "--ignore-preflight-errors=all", "--config="+config)
cmd.Env = append(os.Environ(),
fmt.Sprintf("PATH=%s:%s", constants.BaseInstallDir, os.Getenv("PATH")),
)
err := executil.LogRun(cmd)
if err != nil {
log.Fatalf("failed to run %q: %s", strings.Join(cmd.Args, " "), err)
}
}
func init() {
rootCmd.AddCommand(nodeCmdInit)
nodeCmdInit.Flags().StringVar(&initCfgPath, "cfg", "", "Location of configuration file")
}