README.md

This is a customized version of solr & zookeeper v1.3.3 Helm Charts.

Use Case

I customize the Helm packages so I can migrate an existing solrcloud onto k8s environment without experiencing downtime.

The following is the use case for this project.

• An existing solrcloud running on a zookeeper essemble which you want to migrate onto k8s.
• You don't want your data service to experience downtime during the migration.

We cannot just the back and restore cause there will be downtime. The better way would be scale the existing solrcloud out onto k8s, and then gradually remove previous solr & zookeeper instances. The current zookeeper Helm package creates an independent essenble in k8s.

Base version

• /incubator/solr
  • forked from: Solr Helm Chart 1.3.3 Solr 7.7.2
• /incubator/zookeeper
  • forked from: Zookeeper Helm Chart 1.3.3 Zookeeper 3.4.10

Getting Started

• helm dep up
  • If you have changed anything under /incubator/zookeeper, you should run this command
  • This will pack zookeeper under /charts.
• helm install solr -f solr-deploy-vars.yaml .
  • This will install solr with custom values defined in solr-deploy-vars.yaml

Sample value.xml

Solr chart params

image:
  tag: 7.7.1
javaMem: "-Xms512m -Xmx512m"
logLevel: INFO
replicaCount: 1
existingZKEssenble:
  - ip-172-31-1-111.ap-southeast-1.compute.internal:2181
  - ip-172-31-1-112.ap-southeast-1.compute.internal:2181
  - ip-172-31-1-113.ap-southeast-1.compute.internal:2181
gcTune: "-XX:NewRatio=3 \
-XX:SurvivorRatio=4 \
-XX:TargetSurvivorRatio=90 \
-XX:MaxTenuringThreshold=8 \
-XX:ConcGCThreads=4 -XX:ParallelGCThreads=4 \
-XX:+CMSScavengeBeforeRemark \
-XX:PretenureSizeThreshold=64m \
-XX:+UseCMSInitiatingOccupancyOnly \
-XX:CMSInitiatingOccupancyFraction=50 \
-XX:CMSMaxAbortablePrecleanTime=6000 \
-XX:+CMSParallelRemarkEnabled \
-XX:+ParallelRefProcEnabled"
livenessProbe:
  initialDelaySeconds: 60
  periodSeconds: 60
  timeoutSeconds: 15
readinessProbe:
  initialDelaySeconds: 60
  periodSeconds: 60
  timeoutSeconds: 15
volumeClaimTemplates:
  storageSize: "6Gi"
resources:
  limits:
    cpu: "1"
    memory: 1024Mi
  requests:
    cpu: 100m
    memory: 256Mi
affinity:
  podAntiAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      - topologyKey: "kubernetes.io/hostname"
        labelSelector:
          matchLabels:
            app.kubernetes.io/name: solr

Zookeepr subchart params

zookeeper:
  replicaCount: 1
  image:
    repository: zookeeper
    tag: 3.4.14
  existingZKEssenble:
    - ip-172-31-1-111.ap-southeast-1.compute.internal:2888:3888
    - ip-172-31-1-112.ap-southeast-1.compute.internal:2888:3888
    - ip-172-31-1-113.ap-southeast-1.compute.internal:2888:3888
  livenessProbe:
    initialDelaySeconds: 30
    periodSeconds: 60
    timeoutSeconds: 15
  readinessProbe:
    initialDelaySeconds: 30
    periodSeconds: 60
    timeoutSeconds: 15
  resources:
    limits:
      cpu: "1"
      memory: 512Mi
    requests:
      cpu: 100m
      memory: 128Mi
  affinity:
    podAntiAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        - topologyKey: "kubernetes.io/hostname"
          labelSelector:
            matchLabels:
              app: zookeeper
  persistence:
    size: 2Gi
  env:
    ZK_HEAP_SIZE: 256m