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An Ambari Stack for Redis

Ambari stack for easily installing and managing Redis on HDP cluster

###Assumptions

  • Ambari is installed and running. If not, you can use sandbox VM Image provided by Hortonworks website
  • No previous installations of Redis exist. If there any, you can either remove it or rename it.

Follow given step to install and manage Redis using Ambari.

####Connect to the VM via SSH (password hadoop for sandbox image) and start Ambari server

ssh [email protected]

####To deploy the Redis, run below

cd /var/lib/ambari-server/resources/stacks/HDP/2.2/services
git clone https://github.com/nikunjness/redis-ambari.git

####Restart Ambari #####on sandbox sudo service ambari restart

#####on non-sandbox sudo service ambari-server restart

####Then you can click on 'Add Service' from the 'Actions' dropdown menu in the bottom left of the Ambari dashboard:

On bottom left -> Actions -> Add service -> check Redis -> Next -> Next -> Next -> Deploy

Image Image Image Image Image Image Image

####On successful deployment you will see the Redis as part of Ambari stack and will be able to start/stop the service from here:

Image

####You can see the parameters you configured under 'Configs' tab Image

####Use Redis

  • Check the contents of the redis log file we specified
# cat /var/log/redis.log
Starting redis: [  OK  ]
  • Check status of Redis
# service redis status
redis-server (pid  8175) is running...
  • One benefit to wrapping the component in Ambari service is that you can now monitor/manage this service remotely via REST API
export SERVICE=REDIS
export PASSWORD=admin
export AMBARI_HOST="your_ambari_hostname"
export CLUSTER="your_ambari_cluster_name"

#get service status
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X GET http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE

#start service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start $SERVICE via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE

#stop service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Stop $SERVICE via REST"}, "Body": {"ServiceInfo": {"state": "INSTALLED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER/services/$SERVICE

Remove Redis

  • To remove the Redis:

    • Stop the service via Ambari

    • Delete the service

      curl -u admin:admin -i -H 'X-Requested-By: ambari' -X DELETE http://replace_with_your_ambari_hostname.com:8080/api/v1/clusters/ambari_cluster_name/services/REDIS

    • Remove artifacts

      rm -rf /var/lib/ambari-server/resources/stacks/HDP/2.2/services/redis-ambari

    • Restart Ambari

      service ambari restart

###References: https://github.com/abajwa-hw/ntpd-stack