Restart all tasks for a given cluster in Ambari

restartAllTasks.sh

#!/bin/bash

#https://cwiki.apache.org/confluence/display/AMBARI/Add+a+host+and+deploy+components+using+APIs

CLUSTER=cluster
IP=localhost

curl -H 'X-Requested-By: ambari' --user admin:admin -i -X GET http://${IP}:8080/api/v1/clusters/${CLUSTER}/hosts -o /tmp/hosts.txt

for host in `cat /tmp/hosts.txt | grep -i host_name | awk '{print $NF}' | sed 's|"||g'`
do
  echo $host
  curl -H 'X-Requested-By: ambari' --user admin:admin -i -X GET http://${IP}:8080/api/v1/clusters/${CLUSTER}/hosts/$host/host_components -o /tmp/host_components.txt
  for component in `cat /tmp/host_components.txt | grep -i href | grep -i host_components | awk '{print $NF}' | sed 's|[",]||g'`
  do
      echo $component
      curl -H 'X-Requested-By: ambari' --user admin:admin -i -X GET $component -o /tmp/component.txt -v
      curl -H 'X-Requested-By: ambari' --user admin:admin -i -X PUT -d '{"HostRoles": {"state": "INSTALLED"}}' $component

      sleep 2s
  done

done