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api.go
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api.go
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package kotsadm
import (
"bytes"
"time"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/k8sutil"
"github.com/replicatedhq/kots/pkg/kotsadm/types"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/serializer/json"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
)
var timeoutWaitingForAPI = time.Duration(time.Minute * 2)
func getApiYAML(deployOptions types.DeployOptions) (map[string][]byte, error) {
docs := map[string][]byte{}
s := json.NewYAMLSerializer(json.DefaultMetaFactory, scheme.Scheme, scheme.Scheme)
var role bytes.Buffer
if err := s.Encode(apiRole(deployOptions.Namespace), &role); err != nil {
return nil, errors.Wrap(err, "failed to marshal api role")
}
docs["api-role.yaml"] = role.Bytes()
var roleBinding bytes.Buffer
if err := s.Encode(apiRoleBinding(deployOptions.Namespace), &roleBinding); err != nil {
return nil, errors.Wrap(err, "failed to marshal api role binding")
}
docs["api-rolebinding.yaml"] = roleBinding.Bytes()
var serviceAccount bytes.Buffer
if err := s.Encode(apiServiceAccount(deployOptions.Namespace), &serviceAccount); err != nil {
return nil, errors.Wrap(err, "failed to marshal api service account")
}
docs["api-serviceaccount.yaml"] = serviceAccount.Bytes()
var deployment bytes.Buffer
if err := s.Encode(apiDeployment(deployOptions), &deployment); err != nil {
return nil, errors.Wrap(err, "failed to marshal api deployment")
}
docs["api-deployment.yaml"] = deployment.Bytes()
var service bytes.Buffer
if err := s.Encode(apiService(deployOptions.Namespace), &service); err != nil {
return nil, errors.Wrap(err, "failed to marshal api service")
}
docs["api-service.yaml"] = service.Bytes()
return docs, nil
}
func waitForAPI(deployOptions *types.DeployOptions, clientset *kubernetes.Clientset) error {
start := time.Now()
for {
pods, err := clientset.CoreV1().Pods(deployOptions.Namespace).List(metav1.ListOptions{LabelSelector: "app=kotsadm-api"})
if err != nil {
return errors.Wrap(err, "failed to list pods")
}
for _, pod := range pods.Items {
if pod.Status.Phase == corev1.PodRunning {
if pod.Status.ContainerStatuses[0].Ready == true {
return nil
}
}
}
time.Sleep(time.Second)
if time.Now().Sub(start) > timeoutWaitingForAPI {
return errors.New("timeout waiting for api pod")
}
}
}
func ensureAPI(deployOptions *types.DeployOptions, clientset *kubernetes.Clientset) error {
if err := ensureApiRBAC(deployOptions, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api rbac")
}
if err := ensureApplicationMetadata(*deployOptions, clientset); err != nil {
return errors.Wrap(err, "failed to ensure custom branding")
}
if err := ensureAPIDeployment(*deployOptions, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api deployment")
}
if err := ensureAPIService(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api service")
}
return nil
}
func ensureApiRBAC(deployOptions *types.DeployOptions, clientset *kubernetes.Clientset) error {
isClusterScoped, err := isKotsadmClusterScoped(deployOptions.ApplicationMetadata)
if err != nil {
return errors.Wrap(err, "failed to check if kotsadm api is cluster scoped")
}
if isClusterScoped {
err := ensureApiClusterRBAC(deployOptions, clientset)
return errors.Wrap(err, "failed to ensure api cluster role")
}
if err := ensureApiRole(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api role")
}
if err := ensureApiRoleBinding(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api role binding")
}
if err := ensureApiServiceAccount(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api service account")
}
return nil
}
func ensureApiClusterRBAC(deployOptions *types.DeployOptions, clientset *kubernetes.Clientset) error {
err := ensureApiClusterRole(clientset)
if err != nil {
return errors.Wrap(err, "failed to ensure api cluster role")
}
if err := ensureApiClusterRoleBinding(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api cluster role binding")
}
if err := ensureApiServiceAccount(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure api service account")
}
return nil
}
func ensureApiClusterRole(clientset *kubernetes.Clientset) error {
_, err := clientset.RbacV1().ClusterRoles().Create(apiClusterRole())
if err == nil || kuberneteserrors.IsAlreadyExists(err) {
return nil
}
return errors.Wrap(err, "failed to create cluster role")
}
func ensureApiClusterRoleBinding(serviceAccountNamespace string, clientset *kubernetes.Clientset) error {
clusterRoleBinding, err := clientset.RbacV1().ClusterRoleBindings().Get("kotsadm-api-rolebinding", metav1.GetOptions{})
if kuberneteserrors.IsNotFound(err) {
_, err := clientset.RbacV1().ClusterRoleBindings().Create(apiClusterRoleBinding(serviceAccountNamespace))
if err != nil {
return errors.Wrap(err, "failed to create cluster rolebinding")
}
return nil
} else if err != nil {
return errors.Wrap(err, "failed to get cluster rolebinding")
}
for _, subject := range clusterRoleBinding.Subjects {
if subject.Namespace == serviceAccountNamespace && subject.Name == "kotsadm-api" && subject.Kind == "ServiceAccount" {
return nil
}
}
clusterRoleBinding.Subjects = append(clusterRoleBinding.Subjects, rbacv1.Subject{
Kind: "ServiceAccount",
Name: "kotsadm-api",
Namespace: serviceAccountNamespace,
})
_, err = clientset.RbacV1().ClusterRoleBindings().Update(clusterRoleBinding)
if err != nil {
return errors.Wrap(err, "failed to create cluster rolebinding")
}
return nil
}
func ensureApiRole(namespace string, clientset *kubernetes.Clientset) error {
currentRole, err := clientset.RbacV1().Roles(namespace).Get("kotsadm-api-role", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get role")
}
_, err := clientset.RbacV1().Roles(namespace).Create(apiRole(namespace))
if err != nil {
return errors.Wrap(err, "failed to create role")
}
return nil
}
// we have now changed the role, so an upgrade is required
k8sutil.UpdateRole(currentRole, apiRole(namespace))
_, err = clientset.RbacV1().Roles(namespace).Update(currentRole)
if err != nil {
return errors.Wrap(err, "failed to update role")
}
return nil
}
func ensureApiRoleBinding(namespace string, clientset *kubernetes.Clientset) error {
_, err := clientset.RbacV1().RoleBindings(namespace).Get("kotsadm-api-rolebinding", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get rolebinding")
}
_, err := clientset.RbacV1().RoleBindings(namespace).Create(apiRoleBinding(namespace))
if err != nil {
return errors.Wrap(err, "failed to create rolebinding")
}
}
// We have never changed the role binding, so there is no "upgrade" applied
return nil
}
func ensureApiServiceAccount(namespace string, clientset *kubernetes.Clientset) error {
_, err := clientset.CoreV1().ServiceAccounts(namespace).Get("kotsadm-api", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get serviceaccouont")
}
_, err := clientset.CoreV1().ServiceAccounts(namespace).Create(apiServiceAccount(namespace))
if err != nil {
return errors.Wrap(err, "failed to create serviceaccount")
}
}
// We have never changed the service account, so there is no "upgrade" applied
return nil
}
func ensureAPIDeployment(deployOptions types.DeployOptions, clientset *kubernetes.Clientset) error {
existingDeployment, err := clientset.AppsV1().Deployments(deployOptions.Namespace).Get("kotsadm-api", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing deployment")
}
_, err := clientset.AppsV1().Deployments(deployOptions.Namespace).Create(apiDeployment(deployOptions))
if err != nil {
return errors.Wrap(err, "failed to create deployment")
}
return nil
}
if err = updateApiDeployment(existingDeployment, deployOptions); err != nil {
return errors.Wrap(err, "failed to merge deployments")
}
_, err = clientset.AppsV1().Deployments(deployOptions.Namespace).Update(existingDeployment)
if err != nil {
return errors.Wrap(err, "failed to update api deployment")
}
return nil
}
func ensureAPIService(namespace string, clientset *kubernetes.Clientset) error {
_, err := clientset.CoreV1().Services(namespace).Get("kotsadm-api-node", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing service")
}
_, err := clientset.CoreV1().Services(namespace).Create(apiService(namespace))
if err != nil {
return errors.Wrap(err, "Failed to create service")
}
}
// We have never changed the api service. We renamed it in 1.11.0, but that's a new object creation
return nil
}
func getAPIAutoCreateClusterToken(namespace string, clientset *kubernetes.Clientset) (string, error) {
autoCreateClusterTokenSecretVal, err := getAPIClusterToken(namespace, clientset)
if err != nil {
return "", errors.Wrap(err, "get autocreate cluter token from secret")
} else if autoCreateClusterTokenSecretVal != "" {
return autoCreateClusterTokenSecretVal, nil
}
existingDeployment, err := clientset.AppsV1().Deployments(namespace).Get("kotsadm-api", metav1.GetOptions{})
if err != nil {
return "", errors.Wrap(err, "failed to read deployment")
}
containerIdx := -1
for idx, c := range existingDeployment.Spec.Template.Spec.Containers {
if c.Name == "kotsadm-api" {
containerIdx = idx
}
}
if containerIdx == -1 {
return "", errors.New("failed to find kotsadm-api container in deployment")
}
for _, env := range existingDeployment.Spec.Template.Spec.Containers[containerIdx].Env {
if env.Name == "AUTO_CREATE_CLUSTER_TOKEN" {
return env.Value, nil
}
}
return "", errors.New("failed to find autocreateclustertoken env on api deployment")
}