how to add variable in kafka-env template by API?

mike_bronson7 — Sun, 18 Aug 2019 05:12:34 GMT

how to add the following variable ( export KAFKA_HEAP_OPTS="-Xms3g -Xmx3g" ) in kafka-env template by API?

the target is to update the file kafka-env template in ambari GUI by API

from ambari GUI

Ambari UI --> Configs --> Advanced --> "Advanced kafka-env" --> kafka-env template

the variable that we want to add by API:

export KAFKA_HEAP_OPTS="-Xms3g -Xmx3g"

Re: how to add variable in kafka-env template by API?

asirna — Fri, 25 May 2018 16:57:18 GMT

@Michael Bronson,

You can do this in 3 steps.

1. Get the latest version tag for kafka-env. You can do this by hitting below curl request

#curl -u admin:admin -H "X-Requested-By: ambari" http://{ambari-host}:{ambari-port}/api/v1/clusters/{cluster-name}?fields=Clusters/desired_configs
Sample resp:
{
  "href" : "http://localhost:8080/api/v1/clusters/clustername?fields=Clusters/desired_configs",
  "Clusters" : {
    "cluster_name" : "clustername",
    "version" : "HDP-2.6",
    "desired_configs" : {
      "accumulo-env" : {
        "tag" : "version1525370182117",
        "version" : 8
      },
      "accumulo-log4j" : {
        "tag" : "version1525368283467",
        "version" : 4
      },
      "accumulo-logsearch-conf" : {
        "tag" : "version1525368283467",
        "version" : 4
      },
      "accumulo-site" : {
        "tag" : "version1525987821696",
        "version" : 9
      },
      "kafka-env" : {
        "tag" : "version1526330057712",
        "version" : 1
      },
      "admin-properties" : {
        "tag" : "version1526330057712",
        "version" : 1
      },
      "ams-env" : {
        "tag" : "version1",
        "version" : 1
      },
      "ams-grafana-env" : {
        "tag" : "version1",
        "version" : 1
      }
    }
  }
}

2) Get the tag for kafka-env from the above response. For above example call, tag for kafka-env is "version1526330057712".

Now get the latest kafka-env config by using the above tag and the curl call.

curl -u admin:admin -H "X-Requested-By: ambari" "http://{ambari-host}:{ambari-port}/api/v1/clusters/{cluster-name}/configurations?type=kafka-env&tag={tag-version}"
Sample resp:
{
  "href" : "http://localhost:8080/api/v1/clusters/clustername/configurations?type=kafka-env&tag=version1525370182459",
  "items" : [
    {
      "href" : "http://localhost:8080/api/v1/clusters/clustername/configurations?type=kafka-env&tag=version1525370182459",
      "tag" : "version1525370182459",
      "type" : "kafka-env",
      "version" : 10,
      "Config" : {
        "cluster_name" : "clustername",
        "stack_id" : "HDP-2.6"
      },
      "properties" : {
        "content" : "\n#!/bin/bash\n\n# Set KAFKA specific environment variables here.\n\n# The java implementation to use.\nexport JAVA_HOME={{java64_home}}\nexport PATH=$PATH:$JAVA_HOME/bin\nexport PID_DIR={{kafka_pid_dir}}\nexport LOG_DIR={{kafka_log_dir}}\n{% if kerberos_security_enabled or kafka_other_sasl_enabled %}\nexport KAFKA_KERBEROS_PARAMS=\"-Djavax.security.auth.useSubjectCredsOnly=false {{kafka_kerberos_params}}\"\n{% else %}\nexport KAFKA_KERBEROS_PARAMS={{kafka_kerberos_params}}\n{% endif %}\n# Add kafka sink to classpath and related depenencies\nif [ -e \"/usr/lib/ambari-metrics-kafka-sink/ambari-metrics-kafka-sink.jar\" ]; then\n  export CLASSPATH=$CLASSPATH:/usr/lib/ambari-metrics-kafka-sink/ambari-metrics-kafka-sink.jar\n  export CLASSPATH=$CLASSPATH:/usr/lib/ambari-metrics-kafka-sink/lib/*\nfi\nif [ -f /etc/kafka/conf/kafka-ranger-env.sh ]; then\n. /etc/kafka/conf/kafka-ranger-env.sh\nfi",
        "is_supported_kafka_ranger" : "true",
        "kafka_keytab" : "/etc/security/keytabs/kafka.service.keytab",
        "kafka_log_dir" : "/var/log/kafka",
        "kafka_pid_dir" : "/var/run/kafka",
        "kafka_principal_name" : "kafka/_HOST@KDC_COLO.COM",
        "kafka_user" : "kafka",
        "kafka_user_nofile_limit" : "128000",
        "kafka_user_nproc_limit" : "65536"
      }
    }
  ]
}

3) Copy the properties json from the above response. Append your config "export KAFKA_HEAP_OPTS="-Xms3g -Xmx3g" to the

content field under properties json.

New content json should look like below

"content" : "\n#!/bin/bash\n\n# Set KAFKA specific environment variables here.\n\n# The java implementation to use.\nexport JAVA_HOME={{java64_home}}\nexport PATH=$PATH:$JAVA_HOME/bin\nexport PID_DIR={{kafka_pid_dir}}\nexport LOG_DIR={{kafka_log_dir}}\n{% if kerberos_security_enabled or kafka_other_sasl_enabled %}\nexport KAFKA_KERBEROS_PARAMS=\"-Djavax.security.auth.useSubjectCredsOnly=false {{kafka_kerberos_params}}\"\n{% else %}\nexport KAFKA_KERBEROS_PARAMS={{kafka_kerberos_params}}\n{% endif %}\n# Add kafka sink to classpath and related depenencies\nif [ -e \"/usr/lib/ambari-metrics-kafka-sink/ambari-metrics-kafka-sink.jar\" ]; then\n  export CLASSPATH=$CLASSPATH:/usr/lib/ambari-metrics-kafka-sink/ambari-metrics-kafka-sink.jar\n  export CLASSPATH=$CLASSPATH:/usr/lib/ambari-metrics-kafka-sink/lib/*\nfi\nif [ -f /etc/kafka/conf/kafka-ranger-env.sh ]; then\n. /etc/kafka/conf/kafka-ranger-env.sh\nfi\nexport KAFKA_HEAP_OPTS=\"-Xms3g -Xmx3g\""

4) Post the new config to ambari

curl -u admin:admin -H "X-Requested-By: ambari" -X PUT -d '[
  {
    "Clusters": {
      "desired_config": [
        {
          "type": "kafka-env",
          "tag": "unique value",
          "properties": {
            "content" : "\n#!/bin/bash\n\n# Set KAFKA specific environment variables here.\n\n# The java implementation to use.\nexport JAVA_HOME={{java64_home}}\nexport PATH=$PATH:$JAVA_HOME/bin\nexport PID_DIR={{kafka_pid_dir}}\nexport LOG_DIR={{kafka_log_dir}}\n{% if kerberos_security_enabled or kafka_other_sasl_enabled %}\nexport KAFKA_KERBEROS_PARAMS=\"-Djavax.security.auth.useSubjectCredsOnly=false {{kafka_kerberos_params}}\"\n{% else %}\nexport KAFKA_KERBEROS_PARAMS={{kafka_kerberos_params}}\n{% endif %}\n# Add kafka sink to classpath and related depenencies\nif [ -e \"/usr/lib/ambari-metrics-kafka-sink/ambari-metrics-kafka-sink.jar\" ]; then\n  export CLASSPATH=$CLASSPATH:/usr/lib/ambari-metrics-kafka-sink/ambari-metrics-kafka-sink.jar\n  export CLASSPATH=$CLASSPATH:/usr/lib/ambari-metrics-kafka-sink/lib/*\nfi\nif [ -f /etc/kafka/conf/kafka-ranger-env.sh ]; then\n. /etc/kafka/conf/kafka-ranger-env.sh\nfi\nexport KAFKA_HEAP_OPTS=\"-Xms3g -Xmx3g\"",
            "is_supported_kafka_ranger": "true",
            "kafka_keytab": "/etc/security/keytabs/kafka.service.keytab",
            "kafka_log_dir": "/var/log/kafka",
            "kafka_pid_dir": "/var/run/kafka",
            "kafka_principal_name": "kafka/_HOST@KDC_COLO.COM",
            "kafka_user": "kafka",
            "kafka_user_nofile_limit": "128000",
            "kafka_user_nproc_limit": "65536"
          },
          "service_config_version_note": "New config version"
        }
      ]
    }
  }
]' "http://localhost:8080/api/v1/clusters/clustername"

Make sure to give unique value for the tag key in the above json. Add all the properties obtained from step 3 in the above curl call and add extra config values if you need any

After doing these steps, new config will be added to Kafka. Restart kafka for the changes to reflect.

Reference : https://cwiki.apache.org/confluence/display/AMBARI/Modify+configurations

-Aditya

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how to add variable in kafka-env template by API?

Re: how to add variable in kafka-env template by API?