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mike_bronson7
mike_bronson7
Gold ⭐️⭐️⭐️
February 3, 2020
Solved

AMBARI REST API + how to verify if specific service required restart

hi all

 

how to verify if specific service required restart?

 

for example - HDFS service

 

in case HDFS service required restart then ambari will show this as

 

Capture.PNG

 

is it possible by rest api to understand if service required restart or not? 

 

for example for - YARN / HIVE , etc

jsensharma
jsensharmaAnswer
Platinum ⭐️⭐️
February 3, 2020

@mike_bronson7

If you just want to find out specific services like HDFS / HIVE /SPARK2 to know whether they require restart or not then you can do this using filtering option service_name.in(xxx,yyy,zzz)

 

# curl -u admin:admin -H "X-Requested-By: ambari" -X GET "ttp://kerlatest1.example.com:8080/api/v1/clusters/KerLatest/host_components?HostRoles/stale_configs=true&HostRoles/service_name.in(HIVE,HDFS,SPARK2)"

 

 

Various Options to get Stale Config Component/Service details.
Similarly there are few other variants of the API call to find out and list the Services/Individual components which require restart.

 

# curl -u admin:admin -H "X-Requested-By: ambari" -X GET  "ttp://kerlatest1.example.com:8080/api/v1/clusters/KerLatest/host_components?HostRoles/stale_configs=true&fields=HostRoles/service_name,HostRoles/host_name"

# curl -u admin:admin -H "X-Requested-By: ambari" -X GET "ttp://kerlatest1.example.com:8080/api/v1/clusters/KerLatest/host_components?HostRoles/stale_configs=true"

# curl -u admin:admin -H "X-Requested-By: ambari" -X GET "ttp://kerlatest1.example.com:8080/api/v1/clusters/KerLatest/host_components?HostRoles/stale_configs=true&fields=HostRoles/service_name"

 


How to restart All Stale Configurations using API call.

 

# curl -u admin:admin -H "X-Requested-By: ambari" -X POST -d  '{"RequestInfo":{"command":"RESTART","context":"Restart all required services","operation_level":"host_component"},"Requests/resource_filters":[{"hosts_predicate":"HostRoles/stale_configs=true"}]}' "ttp://kerlatest1.example.com:8080/api/v1/clusters/KerLatest/requests"

 


.

Please change the Ambari Hostname/port and Cluster name in the above API calls.
I have changed "http://" to "ttp://"  Please correct that protocol prefix before using the above mentioned API calls.

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9 replies

HadoopHelp
HadoopHelp
Gold ⭐️
February 3, 2020

Hi @mike_bronson7 .

 

I think you need to continue here:-

https://community.cloudera.com/t5/Support-Questions/how-to-know-if-any-service-in-ambari-cluster-need-to-restart/td-p/228707

 

 

Thanks

HadoopHelp

 

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mike_bronson7
mike_bronson7Author
Gold ⭐️⭐️⭐️
February 3, 2020

but I am asking diff , we want API that ask about specific service as HDFS or YARN , etc 

this post that you mentioned ( https://community.cloudera.com/t5/Support-Questions/how-to-know-if-any-service-in-ambari-cluster-nee... ) is about all services that required restart 

 

note  -  what we want is API that ask the specific service if required restart or not

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Michael-Bronson
Shelton
Shelton
Gold ⭐️⭐️⭐️
February 3, 2020

@mike_bronson7 

 

Can you run the below it should give the desired response

 

curl -u admin:admin -H "X-Requested-By:ambari" -X GET "http://<ambari-server>:<port>/api/v1/clusters/<clustername>/host_components?HostRoles/stale_configs=false&fields=HostRoles/service_name

 

Please let me know

 

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    mike_bronson7
    mike_bronson7Author
    Gold ⭐️⭐️⭐️
    February 3, 2020

    I get A long list of all services , , any way not see there the HDFS

     

    but what we want is to verify only specific one service 

     

     

     

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    Michael-Bronson
    Shelton
    Shelton
    Gold ⭐️⭐️⭐️
    February 3, 2020

    @mike_bronson7 

    I will not have access  to my environment  for 4 days as I am traveling but  I think you can filter using 

    service_name=HDFS

     I need to test that but that's the way 

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