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rqlite.go
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rqlite.go
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package kotsadm
import (
"bytes"
"context"
"github.com/google/uuid"
"github.com/pkg/errors"
kotsadmobjects "github.com/replicatedhq/kots/pkg/kotsadm/objects"
"github.com/replicatedhq/kots/pkg/kotsadm/types"
corev1 "k8s.io/api/core/v1"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
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"
)
func getRqliteYAML(deployOptions types.DeployOptions) (map[string][]byte, error) {
docs := map[string][]byte{}
s := json.NewYAMLSerializer(json.DefaultMetaFactory, scheme.Scheme, scheme.Scheme)
if deployOptions.RqlitePassword == "" {
deployOptions.RqlitePassword = uuid.New().String()
}
size, err := getSize(deployOptions, "rqlite", resource.MustParse("1Gi"))
if err != nil {
return nil, errors.Wrap(err, "failed to get size")
}
rqliteSts, err := kotsadmobjects.RqliteStatefulset(deployOptions, size)
if err != nil {
return nil, errors.Wrap(err, "failed to get rqlite statefulset definition")
}
var statefulset bytes.Buffer
if err := s.Encode(rqliteSts, &statefulset); err != nil {
return nil, errors.Wrap(err, "failed to marshal rqlite statefulset")
}
docs["rqlite-statefulset.yaml"] = statefulset.Bytes()
var service bytes.Buffer
if err := s.Encode(kotsadmobjects.RqliteService(deployOptions.Namespace), &service); err != nil {
return nil, errors.Wrap(err, "failed to marshal rqlite service")
}
docs["rqlite-service.yaml"] = service.Bytes()
var headlessService bytes.Buffer
if err := s.Encode(kotsadmobjects.RqliteHeadlessService(deployOptions.Namespace), &headlessService); err != nil {
return nil, errors.Wrap(err, "failed to marshal rqlite headless service")
}
docs["rqlite-headless-service.yaml"] = headlessService.Bytes()
return docs, nil
}
func ensureRqlite(deployOptions types.DeployOptions, clientset *kubernetes.Clientset) error {
if err := ensureRqliteSecret(deployOptions, clientset); err != nil {
return errors.Wrap(err, "failed to ensure rqlite secret")
}
size, err := getSize(deployOptions, "rqlite", resource.MustParse("1Gi"))
if err != nil {
return errors.Wrap(err, "failed to get size")
}
if err := ensureRqliteStatefulset(deployOptions, clientset, size); err != nil {
return errors.Wrap(err, "failed to ensure rqlite statefulset")
}
if err := ensureRqliteService(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure rqlite service")
}
if err := ensureRqliteHeadlessService(deployOptions.Namespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure rqlite headless service")
}
return nil
}
func ensureRqliteStatefulset(deployOptions types.DeployOptions, clientset *kubernetes.Clientset, size resource.Quantity) error {
desiredRqlite, err := kotsadmobjects.RqliteStatefulset(deployOptions, size)
if err != nil {
return errors.Wrap(err, "failed to get desired rqlite statefulset definition")
}
ctx := context.TODO()
existingRqlite, err := clientset.AppsV1().StatefulSets(deployOptions.Namespace).Get(ctx, "kotsadm-rqlite", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing statefulset")
}
_, err := clientset.AppsV1().StatefulSets(deployOptions.Namespace).Create(ctx, desiredRqlite, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to create rqlite statefulset")
}
return nil
}
if len(existingRqlite.Spec.Template.Spec.Containers) != 1 || len(desiredRqlite.Spec.Template.Spec.Containers) != 1 {
return errors.New("rqlite statefulset cannot be upgraded")
}
desiredVolumes := []corev1.Volume{}
for _, v := range desiredRqlite.Spec.Template.Spec.Volumes {
desiredVolumes = append(desiredVolumes, *v.DeepCopy())
}
desiredVolumeMounts := []corev1.VolumeMount{}
for _, vm := range desiredRqlite.Spec.Template.Spec.Containers[0].VolumeMounts {
desiredVolumeMounts = append(desiredVolumeMounts, *vm.DeepCopy())
}
existingRqlite.Spec.Template.Spec.Volumes = desiredVolumes
existingRqlite.Spec.Template.Spec.InitContainers = desiredRqlite.Spec.Template.Spec.InitContainers
existingRqlite.Spec.Template.Spec.Containers[0].Image = desiredRqlite.Spec.Template.Spec.Containers[0].Image
existingRqlite.Spec.Template.Spec.Containers[0].VolumeMounts = desiredVolumeMounts
existingRqlite.Spec.Template.Spec.Containers[0].Env = desiredRqlite.Spec.Template.Spec.Containers[0].Env
existingRqlite.Spec.Template.Spec.Containers[0].Resources = desiredRqlite.Spec.Template.Spec.Containers[0].Resources
_, err = clientset.AppsV1().StatefulSets(deployOptions.Namespace).Update(ctx, existingRqlite, metav1.UpdateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update rqlite statefulset")
}
return nil
}
func ensureRqliteService(namespace string, clientset *kubernetes.Clientset) error {
_, err := clientset.CoreV1().Services(namespace).Get(context.TODO(), "kotsadm-rqlite", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing service")
}
_, err := clientset.CoreV1().Services(namespace).Create(context.TODO(), kotsadmobjects.RqliteService(namespace), metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "Failed to create service")
}
}
return nil
}
func ensureRqliteHeadlessService(namespace string, clientset *kubernetes.Clientset) error {
_, err := clientset.CoreV1().Services(namespace).Get(context.TODO(), "kotsadm-rqlite-headless", metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to get existing headless service")
}
_, err := clientset.CoreV1().Services(namespace).Create(context.TODO(), kotsadmobjects.RqliteHeadlessService(namespace), metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "Failed to create headless service")
}
}
return nil
}