forked from openshift/origin
/
run_self_hosted.go
607 lines (533 loc) · 21.4 KB
/
run_self_hosted.go
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package clusterup
import (
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/golang/glog"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
kruntime "k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer/json"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/discovery"
"k8s.io/client-go/rest"
kclientcmd "k8s.io/client-go/tools/clientcmd"
aggregatorclient "k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset"
"k8s.io/kubernetes/pkg/api/legacyscheme"
"github.com/openshift/origin/pkg/oc/clusteradd/componentinstall"
"github.com/openshift/origin/pkg/oc/clusterup/coreinstall/kubeapiserver"
"github.com/openshift/origin/pkg/oc/clusterup/coreinstall/kubelet"
"github.com/openshift/origin/pkg/oc/clusterup/coreinstall/staticpods"
"github.com/openshift/origin/pkg/oc/clusterup/docker/dockerhelper"
"github.com/openshift/origin/pkg/oc/clusterup/docker/host"
"github.com/openshift/origin/pkg/oc/clusterup/manifests"
// install our apis into the legacy scheme
_ "github.com/openshift/origin/pkg/api/install"
)
type staticInstall struct {
Location string
ComponentImage string
}
type componentInstallTemplate struct {
ComponentImage string
Template componentinstall.Template
}
var (
// staticPodInstalls should only include those pods that *must* be run statically because they
// bring up the services required to run the workload controllers.
// etcd, kube-apiserver, kube-controller-manager, kube-scheduler (this is because sig-scheduling is expanding the scheduler responsibilities)
staticPodInstalls = []staticInstall{
{
Location: "install/etcd/etcd.yaml",
ComponentImage: "control-plane",
},
{
Location: "install/kube-apiserver/apiserver.yaml",
ComponentImage: "hypershift",
},
{
Location: "install/kube-controller-manager/kube-controller-manager.yaml",
ComponentImage: "hyperkube",
},
{
Location: "install/kube-scheduler/kube-scheduler.yaml",
ComponentImage: "hyperkube",
},
}
runlevelOneLabel = map[string]string{"openshift.io/run-level": "1"}
runLevelOneKubeComponents = []componentInstallTemplate{
{
ComponentImage: "control-plane",
Template: componentinstall.Template{
Name: "kube-proxy",
Namespace: "kube-proxy",
NamespaceObj: newNamespaceBytes("kube-proxy", runlevelOneLabel),
InstallTemplate: manifests.MustAsset("install/kube-proxy/install.yaml"),
},
},
{
ComponentImage: "control-plane",
Template: componentinstall.Template{
Name: "kube-dns",
Namespace: "kube-dns",
NamespaceObj: newNamespaceBytes("kube-dns", runlevelOneLabel),
InstallTemplate: manifests.MustAsset("install/kube-dns/install.yaml"),
},
},
}
runLevelOneOpenShiftComponents = []componentInstallTemplate{
{
ComponentImage: "hypershift",
Template: componentinstall.Template{
Name: "openshift-apiserver",
Namespace: "openshift-apiserver",
NamespaceObj: newNamespaceBytes("openshift-apiserver", runlevelOneLabel),
InstallTemplate: manifests.MustAsset("install/openshift-apiserver/install.yaml"),
},
},
}
// componentsToInstall DOES NOT INSTALL IN ORDER. They are installed separately and expected to come up
// in any order and self-organize into something that works. Remember, when the whole system crashes and restarts
// you don't get to choose your restart order. Plan accordingly. No bugs or attempts at interlocks will be accepted
// in cluster up.
// TODO we can take a guess at readiness by making sure that pods in the namespace exist and all pods are healthy
// TODO it's not perfect, but its fairly good as a starting point.
componentsToInstall = []componentInstallTemplate{
{
ComponentImage: "hypershift",
Template: componentinstall.Template{
Name: "openshift-controller-manager",
Namespace: "openshift-controller-manager",
NamespaceObj: newNamespaceBytes("openshift-controller-manager", nil),
PrivilegedSANames: []string{"openshift-controller-manager"},
RBACTemplate: manifests.MustAsset("install/openshift-controller-manager/install-rbac.yaml"),
InstallTemplate: manifests.MustAsset("install/openshift-controller-manager/install.yaml"),
},
},
}
)
func (c *ClusterUpConfig) StartSelfHosted(out io.Writer) error {
configDirs, err := c.BuildConfig()
if err != nil {
return err
}
// if we're supposed to write the config, we'll do that and then exit
if c.WriteConfig {
fmt.Printf("Wrote config to: %q\n", c.BaseDir)
return nil
}
kubeletFlags, err := c.makeKubeletFlags(out, configDirs.nodeConfigDir)
if err != nil {
return err
}
glog.V(2).Infof("kubeletflags := %s\n", kubeletFlags)
kubeletContainerID, err := c.startKubelet(out, configDirs.masterConfigDir, configDirs.nodeConfigDir, configDirs.podManifestDir, kubeletFlags)
if err != nil {
return err
}
glog.V(2).Infof("started kubelet in container %q\n", kubeletContainerID)
templateSubstitutionValues := map[string]string{
"MASTER_CONFIG_HOST_PATH": configDirs.masterConfigDir,
"OPENSHIFT_APISERVER_CONFIG_HOST_PATH": configDirs.openshiftAPIServerConfigDir,
"OPENSHIFT_CONTROLLER_MANAGER_CONFIG_HOST_PATH": configDirs.openshiftControllerConfigDir,
"NODE_CONFIG_HOST_PATH": configDirs.nodeConfigDir,
"KUBEDNS_CONFIG_HOST_PATH": configDirs.kubeDNSConfigDir,
"OPENSHIFT_PULL_POLICY": c.pullPolicy,
"LOGLEVEL": fmt.Sprintf("%d", c.ServerLogLevel),
}
clientConfigBuilder, err := kclientcmd.LoadFromFile(filepath.Join(c.LocalDirFor(kubeapiserver.KubeAPIServerDirName), "admin.kubeconfig"))
if err != nil {
return err
}
overrides := &kclientcmd.ConfigOverrides{}
defaultCfg := kclientcmd.NewDefaultClientConfig(*clientConfigBuilder, overrides)
clientConfig, err := defaultCfg.ClientConfig()
if err != nil {
return err
}
clientConfig.Host = c.ServerIP + ":8443"
// wait for the apiserver to be ready
glog.Info("Waiting for the kube-apiserver to be ready ...")
if err := waitForHealthyKubeAPIServer(clientConfig); err != nil {
return err
}
runLevelOneComponents := append([]componentInstallTemplate{}, runLevelOneKubeComponents...)
if !c.KubeOnly {
runLevelOneComponents = append(runLevelOneComponents, runLevelOneOpenShiftComponents...)
}
err = installComponentTemplates(
runLevelOneComponents,
c.ImageTemplate.Format,
c.BaseDir,
templateSubstitutionValues,
c.GetDockerClient(),
)
if err != nil {
return err
}
installContext, err := componentinstall.NewComponentInstallContext(c.cliImage(), c.imageFormat(), c.pullPolicy, c.BaseDir, c.ServerLogLevel)
if err != nil {
return err
}
// if we're only supposed to install kubernetes, don't install anything else.
if c.KubeOnly {
return nil
}
// wait for the openshift apiserver before we create the rest of the components, since they may rely on openshift resources
aggregatorClient, err := aggregatorclient.NewForConfig(installContext.ClusterAdminClientConfig())
if err != nil {
return err
}
err = componentinstall.WaitForAPIs(aggregatorClient,
"v1.apps.openshift.io",
"v1.authorization.openshift.io",
"v1.build.openshift.io",
"v1.image.openshift.io",
"v1.network.openshift.io",
"v1.oauth.openshift.io",
"v1.project.openshift.io",
"v1.quota.openshift.io",
"v1.route.openshift.io",
"v1.security.openshift.io",
"v1.template.openshift.io",
"v1.user.openshift.io",
)
if err != nil {
return err
}
glog.Info("openshift-apiserver available")
go watchAPIServices(aggregatorClient)
err = installComponentTemplates(
componentsToInstall,
c.ImageTemplate.Format,
c.BaseDir,
templateSubstitutionValues,
c.GetDockerClient(),
)
if err != nil {
return err
}
return nil
}
type configDirs struct {
masterConfigDir string
openshiftAPIServerConfigDir string
openshiftControllerConfigDir string
nodeConfigDir string
kubeDNSConfigDir string
podManifestDir string
baseDir string
err error
}
// LocalDirFor returns a local directory path for the given component.
func (c *ClusterUpConfig) LocalDirFor(componentName string) string {
return filepath.Join(c.BaseDir, componentName)
}
// RemoteDirFor returns a directory path on remote host
// DEPRECATED:
func (c *ClusterUpConfig) RemoteDirFor(componentName string) string {
return filepath.Join(host.RemoteHostOriginDir, c.BaseDir, componentName)
}
func (c *ClusterUpConfig) BuildConfig() (*configDirs, error) {
configs := &configDirs{
masterConfigDir: filepath.Join(c.BaseDir, kubeapiserver.KubeAPIServerDirName),
openshiftAPIServerConfigDir: filepath.Join(c.BaseDir, kubeapiserver.OpenShiftAPIServerDirName),
openshiftControllerConfigDir: filepath.Join(c.BaseDir, kubeapiserver.OpenShiftControllerManagerDirName),
nodeConfigDir: filepath.Join(c.BaseDir, kubelet.NodeConfigDirName),
kubeDNSConfigDir: filepath.Join(c.BaseDir, kubelet.KubeDNSDirName),
podManifestDir: filepath.Join(c.BaseDir, kubelet.PodManifestDirName),
}
originalMasterConfigDir := configs.masterConfigDir
originalNodeConfigDir := configs.nodeConfigDir
if _, err := os.Stat(configs.masterConfigDir); os.IsNotExist(err) {
_, err = c.makeMasterConfig()
if err != nil {
return nil, err
}
}
if _, err := os.Stat(configs.openshiftAPIServerConfigDir); os.IsNotExist(err) {
_, err = c.makeOpenShiftAPIServerConfig(originalMasterConfigDir)
if err != nil {
return nil, err
}
}
if _, err := os.Stat(configs.openshiftControllerConfigDir); os.IsNotExist(err) {
_, err = c.makeOpenShiftControllerConfig(originalMasterConfigDir)
if err != nil {
return nil, err
}
}
if _, err := os.Stat(configs.nodeConfigDir); os.IsNotExist(err) {
_, err = c.makeNodeConfig(configs.masterConfigDir)
if err != nil {
return nil, err
}
}
if _, err := os.Stat(configs.kubeDNSConfigDir); os.IsNotExist(err) {
_, err = c.makeKubeDNSConfig(originalNodeConfigDir)
if err != nil {
return nil, err
}
}
if _, err := os.Stat(configs.podManifestDir); os.IsNotExist(err) {
if err := os.MkdirAll(configs.podManifestDir, 0755); err != nil {
return nil, err
}
}
substitutions := map[string]string{
"/path/to/master/config-dir": configs.masterConfigDir,
"/path/to/openshift-apiserver/config-dir": configs.openshiftAPIServerConfigDir,
"ETCD_VOLUME": "emptyDir:\n",
"OPENSHIFT_PULL_POLICY": c.pullPolicy,
}
if len(c.HostDataDir) > 0 {
substitutions["ETCD_VOLUME"] = `hostPath:
path: ` + c.HostDataDir + "\n"
}
glog.V(2).Infof("Creating static pod definitions in %q", configs.podManifestDir)
for _, staticPod := range staticPodInstalls {
if len(staticPod.ComponentImage) > 0 {
substitutions["IMAGE"] = c.ImageTemplate.ExpandOrDie(staticPod.ComponentImage)
} else {
delete(substitutions, "IMAGE")
}
glog.V(3).Infof("Substitutions: %#v", substitutions)
if err := staticpods.UpsertStaticPod(staticPod.Location, substitutions, configs.podManifestDir); err != nil {
return nil, err
}
}
glog.V(2).Infof("configLocations = %#v", *configs)
return configs, nil
}
// makeMasterConfig returns the directory where a generated masterconfig lives
func (c *ClusterUpConfig) makeMasterConfig() (string, error) {
publicHost := c.GetPublicHostName()
container := kubeapiserver.NewKubeAPIServerStartConfig()
container.MasterImage = c.openshiftImage()
container.Args = []string{
"--write-config=/var/lib/origin/openshift.local.config",
fmt.Sprintf("--master=%s", c.ServerIP),
fmt.Sprintf("--images=%s", c.imageFormat()),
fmt.Sprintf("--dns=0.0.0.0:%d", c.DNSPort),
fmt.Sprintf("--public-master=https://%s:8443", publicHost),
"--etcd-dir=/var/lib/etcd",
}
masterConfigDir, err := container.MakeMasterConfig(c.GetDockerClient(), c.BaseDir)
if err != nil {
return "", fmt.Errorf("error creating master config: %v", err)
}
return masterConfigDir, nil
}
// makeNodeConfig returns the directory where a generated nodeconfig lives
func (c *ClusterUpConfig) makeNodeConfig(masterConfigDir string) (string, error) {
defaultNodeName := "localhost"
container := kubelet.NewNodeStartConfig()
container.ContainerBinds = append(container.ContainerBinds, masterConfigDir+":/var/lib/origin/openshift.local.masterconfig:z")
container.CLIImage = c.cliImage()
container.NodeImage = c.nodeImage()
container.Args = []string{
fmt.Sprintf("--certificate-authority=%s", "/var/lib/origin/openshift.local.masterconfig/ca.crt"),
fmt.Sprintf("--dns-bind-address=0.0.0.0:%d", c.DNSPort),
fmt.Sprintf("--hostnames=%s", defaultNodeName),
fmt.Sprintf("--hostnames=%s", "127.0.0.1"),
fmt.Sprintf("--images=%s", c.imageFormat()),
fmt.Sprintf("--node=%s", defaultNodeName),
fmt.Sprintf("--node-client-certificate-authority=%s", "/var/lib/origin/openshift.local.masterconfig/ca.crt"),
fmt.Sprintf("--signer-cert=%s", "/var/lib/origin/openshift.local.masterconfig/ca.crt"),
fmt.Sprintf("--signer-key=%s", "/var/lib/origin/openshift.local.masterconfig/ca.key"),
fmt.Sprintf("--signer-serial=%s", "/var/lib/origin/openshift.local.masterconfig/ca.serial.txt"),
fmt.Sprintf("--volume-dir=%s", c.HostVolumesDir),
}
nodeConfigDir, err := container.MakeNodeConfig(c.GetDockerClient(), c.BaseDir)
if err != nil {
return "", fmt.Errorf("error creating node config: %v", err)
}
return nodeConfigDir, nil
}
// makeKubeletFlags returns the kubelet flags
func (c *ClusterUpConfig) makeKubeletFlags(out io.Writer, nodeConfigDir string) ([]string, error) {
container := kubelet.NewKubeletStartFlags()
container.ContainerBinds = append(container.ContainerBinds, nodeConfigDir+":/var/lib/origin/openshift.local.config/node:z")
container.NodeImage = c.nodeImage()
container.UseSharedVolume = !c.UseNsenterMount
kubeletFlags, err := container.MakeKubeletFlags(c.GetDockerClient(), c.BaseDir)
if err != nil {
return nil, fmt.Errorf("error creating node config: %v", err)
}
// TODO make this non-broken, but for now spaces are evil
flags := strings.Split(strings.TrimSpace(kubeletFlags), " ")
if driverName, err := c.DockerHelper().CgroupDriver(); err == nil && driverName == "cgroupfs" {
flags = append(flags, "--cgroup-driver=cgroupfs")
}
// TODO: OSX snowflake
// Default changed in kube 1.10. This ultimately breaks Docker For Mac as every hostPath
// mount must be shared or rslave.
if runtime.GOOS == "darwin" {
flags = append(flags, "--feature-gates=MountPropagation=false")
}
return flags, nil
}
func (c *ClusterUpConfig) makeKubeDNSConfig(nodeConfig string) (string, error) {
return kubelet.MakeKubeDNSConfig(nodeConfig, c.BaseDir)
}
func (c *ClusterUpConfig) makeOpenShiftAPIServerConfig(masterConfigDir string) (string, error) {
return kubeapiserver.MakeOpenShiftAPIServerConfig(masterConfigDir, c.RoutingSuffix, c.BaseDir)
}
func (c *ClusterUpConfig) makeOpenShiftControllerConfig(masterConfigDir string) (string, error) {
return kubeapiserver.MakeOpenShiftControllerConfig(masterConfigDir, c.BaseDir)
}
// startKubelet returns the container id
func (c *ClusterUpConfig) startKubelet(out io.Writer, masterConfigDir, nodeConfigDir, podManifestDir string, kubeletFlags []string) (string, error) {
dockerRoot, err := c.DockerHelper().DockerRoot()
if err != nil {
return "", err
}
// here's a cool thing. The kubelet flags specify a --root-dir which is the *real* HostVolumesDir
hostVolumeDir := c.HostVolumesDir
for i, flag := range kubeletFlags {
if strings.HasPrefix(flag, "--root-dir=") {
hostVolumeDir = strings.TrimLeft(flag, "--root-dir=")
// TODO: Figure out if we need this on Windows as well
if runtime.GOOS != "linux" {
kubeletFlags[i] = "--root-dir=" + c.HostVolumesDir
}
}
}
container := kubelet.NewKubeletRunConfig()
container.ContainerBinds = append(container.ContainerBinds, nodeConfigDir+":/var/lib/origin/openshift.local.config/node:z")
container.ContainerBinds = append(container.ContainerBinds, masterConfigDir+":/var/lib/origin/openshift.local.config/master:z")
container.ContainerBinds = append(container.ContainerBinds, podManifestDir+":/var/lib/origin/pod-manifests:z")
container.ContainerBinds = append(container.ContainerBinds, fmt.Sprintf("%s:/var/lib/etcd:z", c.HostDataDir))
container.ContainerBinds = append(container.ContainerBinds, fmt.Sprintf("%[1]s:%[1]s", c.HostPersistentVolumesDir))
container.Environment = append(container.Environment, fmt.Sprintf("OPENSHIFT_PV_DIR=%s", c.HostPersistentVolumesDir))
if !c.UseNsenterMount {
hostVolumeDirSource := hostVolumeDir
// TODO: Figure out if we need this on Windows as well
if runtime.GOOS != "linux" {
hostVolumeDirSource = c.HostVolumesDir
}
container.ContainerBinds = append(container.ContainerBinds, fmt.Sprintf("%s:%s:shared", hostVolumeDirSource, hostVolumeDir))
container.Environment = append(container.Environment, "OPENSHIFT_CONTAINERIZED=false")
} else {
container.ContainerBinds = append(container.ContainerBinds, "/:/rootfs:ro")
container.ContainerBinds = append(container.ContainerBinds, fmt.Sprintf("%[1]s:%[1]s:rslave", hostVolumeDir))
}
container.ContainerBinds = append(container.ContainerBinds, fmt.Sprintf("%[1]s:%[1]s", dockerRoot))
// Kubelet needs to be able to write to
// /sys/devices/virtual/net/vethXXX/brport/hairpin_mode, so make this rw, not ro.
container.ContainerBinds = append(container.ContainerBinds, "/sys/devices/virtual/net:/sys/devices/virtual/net:rw")
container.NodeImage = c.nodeImage()
container.HTTPProxy = c.HTTPProxy
container.HTTPSProxy = c.HTTPSProxy
container.NoProxy = c.NoProxy
actualKubeletFlags := []string{}
for _, curr := range kubeletFlags {
if curr == "--cluster-dns=" {
continue
}
if curr == "--pod-manifest-path=" {
continue
}
actualKubeletFlags = append(actualKubeletFlags, curr)
}
container.Args = append(actualKubeletFlags, "--pod-manifest-path=/var/lib/origin/pod-manifests")
container.Args = append(container.Args, "--cluster-dns=172.30.0.2")
container.Args = append(container.Args, fmt.Sprintf("--v=%d", c.ServerLogLevel))
glog.V(1).Info(strings.Join(container.Args, " "))
kubeletContainerID, err := container.StartKubelet(c.DockerHelper().Client(), c.BaseDir)
if err != nil {
return "", fmt.Errorf("error creating node config: %v", err)
}
return kubeletContainerID, nil
}
func waitForHealthyKubeAPIServer(clientConfig *rest.Config) error {
var healthzContent string
// If apiserver is not running we should wait for some time and fail only then. This is particularly
// important when we start apiserver and controller manager at the same time.
var lastResponseError error
err := wait.PollImmediate(time.Second, 5*time.Minute, func() (bool, error) {
discoveryClient, err := discovery.NewDiscoveryClientForConfig(clientConfig)
if err != nil {
return false, nil
}
healthStatus := 0
resp := discoveryClient.RESTClient().Get().AbsPath("/healthz").Do().StatusCode(&healthStatus)
if resp.Error() != nil {
glog.V(4).Infof("Server isn't healthy yet. Waiting a little while. %v", resp.Error())
lastResponseError = resp.Error()
return false, nil
}
content, _ := resp.Raw()
healthzContent = string(content)
if healthStatus != http.StatusOK {
glog.V(4).Infof("Server isn't healthy yet. Waiting a little while. %v", healthStatus)
return false, nil
}
return true, nil
})
if err != nil {
glog.Errorf("API server error: %v (%s)", lastResponseError, healthzContent)
}
return err
}
func watchAPIServices(aggregatorClient aggregatorclient.Interface) {
watch, err := aggregatorClient.ApiregistrationV1beta1().APIServices().Watch(metav1.ListOptions{})
if err != nil {
panic(err)
}
watchCh := watch.ResultChan()
for {
select {
case watchEvent, ok := <-watchCh:
if !ok {
glog.V(5).Infof("channel closed, restablishing")
watch, err := aggregatorClient.ApiregistrationV1beta1().APIServices().Watch(metav1.ListOptions{})
if err != nil {
panic(err)
}
watchCh = watch.ResultChan()
}
if watchEvent.Object == nil {
glog.V(5).Infof("observed %q without an object", watchEvent.Type)
break
}
encoder := json.NewYAMLSerializer(json.DefaultMetaFactory, legacyscheme.Scheme, legacyscheme.Scheme)
output, err := kruntime.Encode(encoder, watchEvent.Object)
if err != nil {
utilruntime.HandleError(err)
continue
}
glog.V(5).Infof("observed %q with\n%v", watchEvent.Type, string(output))
}
}
}
func newNamespaceBytes(namespace string, labels map[string]string) []byte {
ns := &corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: namespace, Labels: labels}}
output, err := kruntime.Encode(legacyscheme.Codecs.LegacyCodec(corev1.SchemeGroupVersion), ns)
if err != nil {
// coding error
panic(err)
}
return output
}
func installComponentTemplates(templates []componentInstallTemplate, imageFormat, baseDir string, params map[string]string, dockerClient dockerhelper.Interface) error {
components := []componentinstall.Component{}
cliImage := strings.Replace(imageFormat, "${component}", "cli", -1)
for _, template := range templates {
paramsWithImage := make(map[string]string)
for k, v := range params {
paramsWithImage[k] = v
}
if len(template.ComponentImage) > 0 {
paramsWithImage["IMAGE"] = strings.Replace(imageFormat, "${component}", template.ComponentImage, -1)
}
components = append(components, template.Template.MakeReady(cliImage, baseDir, paramsWithImage))
}
return componentinstall.InstallComponents(components, dockerClient)
}