From bfd5906e06e6fbbf70c389400075c5f0734d69f5 Mon Sep 17 00:00:00 2001
From: Matthieu Cauffiez <matthieu.cauffiez@bell.ca>
Date: Mon, 18 Mar 2019 15:11:38 -0400
Subject: if increasing zookeeper quorom wont be maintained
https://gerrit.onap.org/r/#/c/82044/ if the number is
even quorum wont be maintained.
Issue-ID: DMAAP-1088
Change-Id: I82a998a4922499c753f9f8e256b0f76ce90fa31f
Signed-off-by: Matthieu Cauffiez <matthieu.cauffiez@bell.ca>
---
.../templates/_zkquorum.tpl | 34 ++++++++++++++++++++++
.../templates/poddisruptionbudget.yaml | 2 +-
2 files changed, 35 insertions(+), 1 deletion(-)
create mode 100644 kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/_zkquorum.tpl
(limited to 'kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates')
diff --git a/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/_zkquorum.tpl b/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/_zkquorum.tpl
new file mode 100644
index 0000000000..9af910eb89
--- /dev/null
+++ b/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/_zkquorum.tpl
@@ -0,0 +1,34 @@
+{{/*
+# Copyright © 2019 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.
+*/}}
+
+{{- /*
+ Calculate the maximum number of zk server down in order to guarantee ZK quorum.
+ For guaranteeing ZK quorum we need half of the server + 1 up.
+
+ div in go template cast return an int64
+ so we need to know if it is an even number or an odd.
+ For this we are doing (n/2)*2=n?
+ if true it is even else it is even
+*/ -}}
+{{- define "zk.maxUnavailable" -}}
+{{- $halfReplica := div .Values.replicaCount 2 -}}
+ {{/* divide by 2 and multiply by 2 in order to know if it is an even number*/}}
+ {{if eq (mul $halfReplica 2) (int .Values.replicaCount) }}
+ {{- toYaml (sub $halfReplica 1) -}}
+ {{else}}
+ {{- toYaml $halfReplica -}}
+ {{end}}
+{{- end -}}
diff --git a/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/poddisruptionbudget.yaml b/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/poddisruptionbudget.yaml
index 2d251e90b0..5a370cdc4a 100644
--- a/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/poddisruptionbudget.yaml
+++ b/kubernetes/dmaap/components/message-router/charts/message-router-zookeeper/templates/poddisruptionbudget.yaml
@@ -25,4 +25,4 @@ spec:
selector:
matchLabels:
app: {{ include "common.name" . }}
- maxUnavailable: {{ div (sub .Values.replicaCount 1) 2 }}
+ maxUnavailable: {{ include "zk.maxUnavailable" . }}
--
cgit