Add Common Helm Chart "mariadb-galera"

A new common helm chart that will deploy a Galera cluster for MariaDB.
Please note that this chart is still work in progress and more features
will be added or improved.

Change-Id: Ia4487666798f83d2869c35bcfaacc5516068f194
Issue-ID: OOM-758
Signed-off-by: vitalied <vitalied@amdocs.com>

11 files changed, 418 insertions, 0 deletions

diff --git a/kubernetes/common/mariadb-galera/.helmignore b/kubernetes/common/mariadb-galera/.helmignore
new file mode 100644
index 0000000000..f0c1319444
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/.helmignore
@@ -0,0 +1,21 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
diff --git a/kubernetes/common/mariadb-galera/Chart.yaml b/kubernetes/common/mariadb-galera/Chart.yaml
new file mode 100644
index 0000000000..85f36dc6fb
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/Chart.yaml
@@ -0,0 +1,11 @@
+apiVersion: v1
+description: Chart for MariaDB Galera cluster
+name: mariadb-galera
+version: 2.0.0
+keywords:
+  - mariadb
+  - mysql
+  - database
+  - sql
+  - galera
+  - cluster
\ No newline at end of file
diff --git a/kubernetes/common/mariadb-galera/requirements.yaml b/kubernetes/common/mariadb-galera/requirements.yaml
new file mode 100644
index 0000000000..c169924d82
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/requirements.yaml
@@ -0,0 +1,4 @@
+dependencies:
+  - name: common
+    version: ~2.0.0
+    repository: 'file://../common'
\ No newline at end of file
diff --git a/kubernetes/common/mariadb-galera/templates/NOTES.txt b/kubernetes/common/mariadb-galera/templates/NOTES.txt
new file mode 100644
index 0000000000..3dd25ac4b7
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/NOTES.txt
@@ -0,0 +1,12 @@
+MariaDB-Galera service can be accessed via port 3306 on the following DNS name from within your cluster:
+{{ include "common.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local
+
+To connect to your database:
+
+1. Run a pod that you can use as a client:
+
+    kubectl run {{ include "common.fullname" . }}-client --rm --tty -i --image mariadb --command -- bash
+
+2. Connect using the mysql cli, then provide your password:
+    $ mysql -h {{ include "common.fullname" . }} {{- if .Values.mysqlRootPassword }} -p {{ .Values.mysqlRootPassword }}{{- end -}}
+
diff --git a/kubernetes/common/mariadb-galera/templates/configmap.yaml b/kubernetes/common/mariadb-galera/templates/configmap.yaml
new file mode 100644
index 0000000000..094a76cf45
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/configmap.yaml
@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "common.fullname" . }}-confd
+  namespace: {{ include "common.namespace" . }}
+data:
+{{ tpl (.Files.Glob "resources/config/mariadb/conf.d/*").AsConfig . | indent 2 }}
+---
+{{- if .Values.externalConfig }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "common.fullname" . }}-externalConfig
+  namespace: {{ include "common.namespace" . }}
+data:
+  my_extra.cnf: |-
+{{ toYaml .Values.externalConfig | indent 4 }}
+{{- end -}}
\ No newline at end of file
diff --git a/kubernetes/common/mariadb-galera/templates/pv.yaml b/kubernetes/common/mariadb-galera/templates/pv.yaml
new file mode 100644
index 0000000000..184728f8ad
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/pv.yaml
@@ -0,0 +1,37 @@
+{{/*
+# Copyright © 2017 Amdocs, Bell Canada
+#
+# 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.
+*/}}
+
+{{- if and .Values.persistence.enabled (not .Values.persistence.existingClaim) -}}
+kind: PersistentVolume
+apiVersion: v1
+metadata:
+  name: {{ include "common.fullname" . }}
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.name" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+    name: {{ include "common.fullname" . }}
+spec:
+  capacity:
+    storage: {{ .Values.persistence.size}}
+  accessModes:
+    - {{ .Values.persistence.accessMode }}
+  persistentVolumeReclaimPolicy: {{ .Values.persistence.volumeReclaimPolicy }}
+  hostPath:
+    path: {{ .Values.global.persistence.mountPath | default .Values.persistence.mountPath }}/{{ .Release.Name }}/{{ .Values.persistence.mountSubPath }}
+{{- end -}}
diff --git a/kubernetes/common/mariadb-galera/templates/pvc.yaml b/kubernetes/common/mariadb-galera/templates/pvc.yaml
new file mode 100644
index 0000000000..e27c3311e9
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/pvc.yaml
@@ -0,0 +1,48 @@
+{{/*
+# Copyright © 2017 Amdocs, Bell Canada
+#
+# 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.
+*/}}
+
+{{- if and .Values.persistence.enabled (not .Values.persistence.existingClaim) -}}
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: {{ include "common.fullname" . }}
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.name" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+{{- if .Values.persistence.annotations }}
+  annotations:
+{{ toYaml .Values.persistence.annotations | indent 4 }}
+{{- end }}
+spec:
+  selector:
+    matchLabels:
+      name: {{ include "common.fullname" . }}
+  accessModes:
+    - {{ .Values.persistence.accessMode }}
+  resources:
+    requests:
+      storage: {{ .Values.persistence.size }}
+{{- if .Values.persistence.storageClass }}
+{{- if (eq "-" .Values.persistence.storageClass) }}
+  storageClassName: ""
+{{- else }}
+  storageClassName: "{{ .Values.persistence.storageClass }}"
+{{- end }}
+{{- end }}
+{{- end -}}
diff --git a/kubernetes/common/mariadb-galera/templates/secrets.yaml b/kubernetes/common/mariadb-galera/templates/secrets.yaml
new file mode 100644
index 0000000000..101a7eba79
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/secrets.yaml
@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "common.fullname" . }}
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.name" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+type: Opaque
+data:
+  db-root-password: {{ .Values.config.mariadbRootPassword | b64enc | quote }}
+  user-password: {{ default "" .Values.config.userPassword | b64enc | quote }}
\ No newline at end of file
diff --git a/kubernetes/common/mariadb-galera/templates/service.yaml b/kubernetes/common/mariadb-galera/templates/service.yaml
new file mode 100644
index 0000000000..f5f93ed9b6
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/service.yaml
@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
+  name: {{ include "common.fullname" . }}
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.fullname" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+spec:
+  ports:
+    - name: {{ .Values.service.name }}
+      port: {{ .Values.service.internalPort }}
+  clusterIP: None
+  selector:
+    app: {{ include "common.fullname" . }}
\ No newline at end of file
diff --git a/kubernetes/common/mariadb-galera/templates/statefulset.yaml b/kubernetes/common/mariadb-galera/templates/statefulset.yaml
new file mode 100644
index 0000000000..b8ba75e52c
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/templates/statefulset.yaml
@@ -0,0 +1,119 @@
+apiVersion: apps/v1beta1
+kind: StatefulSet
+metadata:
+  name: {{ include "common.fullname" . }}
+  namespace: {{ include "common.namespace" . }}
+  labels:
+    app: {{ include "common.fullname" . }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+spec:
+  serviceName: {{ include "common.fullname" . }}
+  replicas: {{ .Values.replicaCount }}
+  template:
+    metadata:
+      labels:
+        app: {{ include "common.fullname" . }}
+      annotations:
+        pod.alpha.kubernetes.io/initialized: "true"
+    spec:
+    {{- if .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml .Values.nodeSelector | indent 8 }}
+    {{- end }}
+      volumes:
+      {{- if .Values.externalConfig }}
+        - name: config
+          configMap:
+            name: {{ include "common.fullname" . }}-externalConfig
+      {{- end}}
+        - name: localtime
+          hostPath:
+            path: /etc/localtime
+      imagePullSecrets:
+      - name: {{ include "common.namespace" . }}-docker-registry-key
+      containers:
+        - name: {{ include "common.fullname" . }}
+          image: "{{ .Values.global.repository | default .Values.repository }}/{{ .Values.image }}"
+          imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy | quote}}
+          env:
+            - name: POD_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  apiVersion: v1
+                  fieldPath: metadata.namespace
+            - name: MYSQL_USER
+              value: {{ default "" .Values.config.userName | quote }}
+            - name: MYSQL_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: {{ template "common.fullname" . }}
+                  key: user-password
+            - name: MYSQL_DATABASE
+              value: {{ default "" .Values.config.mysqlDatabase | quote }}
+            - name: MYSQL_ROOT_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: {{ template "common.fullname" . }}
+                  key: db-root-password
+          ports:
+          - containerPort: {{ .Values.service.internalPort }}
+            name: {{ .Values.service.name }}
+          - containerPort: {{ .Values.service.sstPort }}
+            name: {{ .Values.service.sstName }}
+          - containerPort: {{ .Values.service.replicationPort }}
+            name: {{ .Values.service.replicationName }}
+          - containerPort: {{ .Values.service.istPort }}
+            name: {{ .Values.service.istName }}
+          readinessProbe:
+            exec:
+              command:
+              - /usr/share/container-scripts/mysql/readiness-probe.sh
+            initialDelaySeconds: {{ .Values.readiness.initialDelaySeconds }}
+            periodSeconds: {{ .Values.readiness.periodSeconds }}
+      {{- if eq .Values.liveness.enabled true }}
+          livenessProbe:
+            exec:
+              command: ["mysqladmin", "ping"]
+            initialDelaySeconds: {{ .Values.liveness.initialDelaySeconds }}
+            periodSeconds: {{ .Values.liveness.periodSeconds }}
+            timeoutSeconds: {{ .Values.liveness.timeoutSeconds }}
+      {{- end }}
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+          volumeMounts:
+        {{- if .Values.externalConfig }}
+          - mountPath: /etc/config
+            name: config
+        {{- end}}
+          - mountPath: /etc/localtime
+            name: localtime
+            readOnly: true
+{{- if .Values.persistence.enabled }}
+          - mountPath: /var/lib/mysql
+            name: {{ include "common.fullname" . }}-data
+            subPath: data
+      initContainers:
+        - name: mariadb-galera-prepare
+          image: {{ .Values.global.repository | default .Values.repository }}/{{ .Values.imageInit }}
+          command: ["sh", "-c", "chown -R 27:27 /var/lib/mysql"]
+          volumeMounts:
+            - name: {{ include "common.fullname" . }}-data
+              mountPath: /var/lib/mysql
+  volumeClaimTemplates:
+  - metadata:
+      name: {{ include "common.fullname" . }}-data
+      annotations:
+  {{- if .Values.persistence.storageClass }}
+        volume.beta.kubernetes.io/storage-class: {{ .Values.persistence.storageClass | quote }}
+  {{- else }}
+        volume.alpha.kubernetes.io/storage-class: default
+  {{- end }}
+    spec:
+      accessModes:
+      - {{ .Values.persistence.accessMode | quote }}
+      resources:
+        requests:
+          storage: {{ .Values.persistence.size | quote }}
+{{- end }}
\ No newline at end of file
diff --git a/kubernetes/common/mariadb-galera/values.yaml b/kubernetes/common/mariadb-galera/values.yaml
new file mode 100644
index 0000000000..f65a8a57e6
--- /dev/null
+++ b/kubernetes/common/mariadb-galera/values.yaml
@@ -0,0 +1,115 @@
+#################################################################
+# Global configuration defaults.
+#################################################################
+global:
+  nodePortPrefix: 302
+  repositorySecret: eyJuZXh1czMub25hcC5vcmc6MTAwMDEiOnsidXNlcm5hbWUiOiJkb2NrZXIiLCJwYXNzd29yZCI6ImRvY2tlciIsImVtYWlsIjoiQCIsImF1dGgiOiJaRzlqYTJWeU9tUnZZMnRsY2c9PSJ9fQ==
+  persistence: {}
+  repository: nexus3.onap.org:10001
+
+
+#################################################################
+# Application configuration defaults.
+#################################################################
+
+#repository: mysql
+repository: nexus3.onap.org:10001
+image: adfinissygroup/k8s-mariadb-galera-centos:v002
+imageInit: busybox
+pullPolicy: IfNotPresent
+
+# application configuration
+config:
+  mariadbRootPassword: secretpassword
+  userName: my-user
+  userPassword: my-password
+  mysqlDatabase: my-database
+
+# default number of instances in the StatefulSet
+replicaCount: 3
+
+nodeSelector: {}
+
+affinity: {}
+
+# probe configuration parameters
+liveness:
+  initialDelaySeconds: 30
+  periodSeconds: 10
+  timeoutSeconds: 5
+  # necessary to disable liveness probe when setting breakpoints
+  # in debugger so K8s doesn't restart unresponsive container
+  enabled: true
+
+readiness:
+  initialDelaySeconds: 15
+  periodSeconds: 10
+
+## Persist data to a persitent volume
+persistence:
+  enabled: false
+
+  ## A manually managed Persistent Volume and Claim
+  ## Requires persistence.enabled: true
+  ## If defined, PVC must be created manually before volume will be bound
+  # existingClaim:
+  volumeReclaimPolicy: Retain
+
+  ## database data Persistent Volume Storage Class
+  ## If defined, storageClassName: <storageClass>
+  ## If set to "-", storageClassName: "", which disables dynamic provisioning
+  ## If undefined (the default) or set to null, no storageClassName spec is
+  ##   set, choosing the default provisioner.  (gp2 on AWS, standard on
+  ##   GKE, AWS & OpenStack)
+  ##
+  # storageClass: "-"
+  accessMode: ReadWriteOnce
+  size: 2Gi
+
+
+service:
+  internalPort: 3306
+  name: mariadb-galera
+  sstPort: 4444
+  sstName: sst
+  replicationPort: 4567
+  replicationName: replication
+  istPort: 4568
+  istName: ist
+
+ingress:
+  enabled: false
+
+
+## Configure MariaDB-Galera with a custom my.cnf file
+## ref: https://mariadb.com/kb/en/mariadb/configuring-mariadb-with-mycnf/#example-of-configuration-file
+##
+externalConfig: {}
+# externalConfig: |-
+  # [mysqld]
+  # innodb_buffer_pool_size=2G
+
+#resources: {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  #
+  # Example:
+  # Configure resource requests and limits
+  # ref: http://kubernetes.io/docs/user-guide/compute-resources/
+  # Minimum memory for development is 2 CPU cores and 4GB memory
+  # Minimum memory for production is 4 CPU cores and 8GB memory
+resources:
+  limits:
+    cpu: 2
+    memory: 4Gi
+  requests:
+    cpu: 2
+    memory: 4Gi
+
+# Name for mariadb-galera cluster - should be unique accross all projects or other clusters
+nameOverride: mariadb-galera
+
+# DNS name for mariadb-galera cluster - should be unique accross all projects other clusters
+#dnsnameOverride: mariadb-galera
\ No newline at end of file