[STRIMZI] Add strimzi kafka templates

Add template for strimzi KafkaUser and topic
Move sdc-be to use given templates

Signed-off-by: efiacor <fiachra.corcoran@est.tech>
Change-Id: Idc3c5af7f4945466f8419fed7d2f43de36aacd13
Issue-ID: DMAAP-1836

1 files changed, 132 insertions, 0 deletions

diff --git a/kubernetes/common/common/templates/_strimzikafka.tpl b/kubernetes/common/common/templates/_strimzikafka.tpl
new file mode 100644
index 0000000000..3fd46c7414
--- /dev/null
+++ b/kubernetes/common/common/templates/_strimzikafka.tpl
@@ -0,0 +1,132 @@
+{{/*
+# Copyright © 2022 Nordix Foundation
+#
+# 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.
+*/}}
+
+{{/*
+  Create a Strimzi KafkaUser.
+  Usage:
+      include "common.kafkauser" .
+
+  Strimzi kafka provides cluster access via its custom resource definition KafkaUser
+  which is deployed using its User Operator component.
+  See more info here - https://github.com/strimzi/strimzi-kafka-operator/blob/main/helm-charts/helm3/strimzi-kafka-operator/crds/044-Crd-kafkauser.yaml
+  This allows fine grained access control per user towards the kafka cluster.
+  See more info here - https://strimzi.io/docs/operators/latest/configuring.html#proc-configuring-kafka-user-str
+
+  The kafka user definition is defined as part of .Values per component.
+  For general use by OOM components, the following list of acl types should suffice:
+       type: group (Used by the client app to be added to a particular kafka consumer group)
+       type: topic (1 or more kafka topics that the client needs to access. Commonly [Read,Write])
+
+  Note: The template will use the following default values.
+
+    spec.authentication.type: scram-sha-512 (dictated by the available broker listeners on the kafka cluster)
+    spec.authorization.type: simple (Only type supported by strimzi at present)
+    spec.authorization.acls.resource.patternType: literal
+
+  Example:
+
+  kafkaUser:
+    acls:
+      - name: sdc (mandatory)
+        suffix: mysuffix (optional. Will be appended (with a hyphen) to the "name" entry. ie "sdc-mysuffix")
+        type: group (mandatory. Type "group" is used by the client as it's kafka consumer group)
+        operations: [Read] (mandatory. List of at least 1)
+      - name: SDC-DISTR
+        type: topic
+        patternType: prefix (optional. In this example, the user will be provided Read and Write access to all topics named "SDC-DISTR*")
+        operations: [Read, Write]
+*/}}
+{{- define "common.kafkauser" -}}
+{{- $global := .global }}
+apiVersion: kafka.strimzi.io/v1beta2
+kind: KafkaUser
+metadata:
+  name: {{ include "common.name" . }}-ku
+  namespace: {{ include "common.namespace" $global }}
+  labels:
+    strimzi.io/cluster: {{ include "common.release" . }}-strimzi
+spec:
+  authentication:
+    type: {{ .Values.kafkaUser.authenticationType | default "scram-sha-512" }}
+  authorization:
+    type: {{ .Values.kafkaUser.authorizationType | default "simple" }}
+    acls:
+      {{- range $acl := .Values.kafkaUser.acls }}
+      - resource:
+          type: {{ $acl.type }}
+          patternType: {{ $acl.patternType | default "literal" }}
+          name: {{ ternary (printf "%s-%s" $acl.name $acl.suffix) $acl.name (hasKey $acl "suffix") }}
+        operations:
+        {{- range $operation := $acl.operations }}
+          - {{ . }}
+        {{- end }}
+      {{- end }}
+{{- end -}}
+
+{{/*
+  Create a Strimzi KafkaTopic.
+  Usage:
+      include "common.kafkatopic" .
+
+  Strimzi kafka provides kafka topic management via its custom resource definition KafkaTopic
+  which is deployed using its Topic Operator component.
+  See more info here - https://github.com/strimzi/strimzi-kafka-operator/blob/main/helm-charts/helm3/strimzi-kafka-operator/crds/043-Crd-kafkatopic.yaml
+
+  Note: KafkaTopic names should adhere to kubernetes object naming conventions - https://kubernetes.io/docs/concepts/overview/working-with-objects/names/
+        maximum length of 253 characters and consist of lower case alphanumeric characters, -, and .
+
+  Note: The template will use the following default values.
+
+    spec.config.retention.ms: 7200000 (defaults to 2 hrs retention for kafka topic logs)
+    spec.config.segment.bytes: 1073741824 (defaults to 1gb)
+    spec.partitions: 6 (defaults to (2 * (default.replication.factor)) defined by the strimzi broker conf)
+    spec.replicas: 3 (defaults to default.replication.factor defined by the strimzi broker conf. Must be > 0 and <= (num of broker replicas))
+
+  The kafka topic definition is defined as part of .Values per component.
+
+  Example:
+
+  kafkaTopic:
+    - name: my-new-topic (mandatory)
+      retentionMs: 7200000 (optional. Defaults to 2hrs)
+      segmentBytes: 1073741824 (optional. Defaults to 1gb)
+      suffix: my-suffix (optional. Will be appended (with a hyphen) to the "name" value. ie "my-new-topic-my-suffix")
+    - name: my.other.topic
+      suffix: some.other-suffix
+*/}}
+{{- define "common.kafkatopic" -}}
+{{- $global := .global }}
+{{- range $topic := .Values.kafkaTopic }}
+apiVersion: kafka.strimzi.io/v1beta2
+kind: KafkaTopic
+metadata:
+  name: {{ ($topic.name) | lower }}-kt
+  labels:
+    strimzi.io/cluster: {{ include "common.release" $ }}-strimzi
+spec:
+  {{- if (hasKey $topic "partitions") }}
+  partitions: {{ $topic.partitions }}
+  {{- end }}
+  {{- if (hasKey $topic "replicas") }}
+  replicas: {{ $topic.replicas }}
+  {{- end }}
+  topicName: {{ ternary (printf "%s-%s" $topic.name $topic.suffix) $topic.name (hasKey $topic "suffix") }}
+  config:
+    retention.ms: {{ $topic.retentionMs | default "7200000" }}
+    segment.bytes: {{ $topic.segmentBytes | default "1073741824"}}
+---
+{{- end }}
+{{- end -}}