Cool. Well config['clusterHostInfo'] is used pretty extensively at several places to get the related info, so you might want to use.
Thanks, Bhuvnesh Chaudhary Email: bchau <[email protected]>[email protected] Desk: +1-650-846-1696 | Mobile: +1-973-906-6976 On Wed, Dec 9, 2015 at 4:47 PM, Christopher Jackson < [email protected]> wrote: > Thanks Bhuvnesh, > > I was actually already doing something similar to what you suggested: > > has_knox = 'topology' in config['configurations’] > > I was hoping there was a way that felt less hackish. > > Regards, > > Christopher Jackson > > On Dec 9, 2015, at 5:37 PM, Bhuvnesh Chaudhary <[email protected]> > wrote: > > Hello Christopher, > > You can check the key clusterHostInfo and examine its content if they have > any component for Knox (knox_gateway_hosts). In params.py you can probably > use the below. > config = Script.get_config() > config['clusterHostInfo'] > > Example of config['clusterHostInfo'] with knox during start of the > component. > > {'snamenode_host': ['c6402.ambari.apache.org'], 'nm_hosts': [' > c6402.ambari.apache.org', 'c6403.ambari.apache.org', ' > c6401.ambari.apache.org'], 'app_timeline_server_hosts': [' > c6402.ambari.apache.org'], 'hawqsegment_hosts': ['c6401.ambari.apache.org'], > 'all_ping_ports': ['8670', '8670', '8670'], 'rm_host': [' > c6402.ambari.apache.org', 'c6401.ambari.apache.org'], 'all_hosts': [' > c6402.ambari.apache.org', 'c6403.ambari.apache.org', ' > c6401.ambari.apache.org'], 'slave_hosts': ['c6402.ambari.apache.org', ' > c6403.ambari.apache.org', 'c6401.ambari.apache.org'], 'all_racks': > ['/default-rack', '/default-rack', '/default-rack'], 'all_ipv4_ips': > ['192.168.64.102', '192.168.64.103', '192.168.64.101'], 'hs_host': [' > c6402.ambari.apache.org'], *'knox_gateway_hosts': > ['c6401.ambari.apache.org <http://c6401.ambari.apache.org/>']*, > 'hawqmaster_hosts': ['c6403.ambari.apache.org'], 'namenode_host': [' > c6401.ambari.apache.org'], 'pxf_hosts': ['c6402.ambari.apache.org', ' > c6403.ambari.apache.org', 'c6401.ambari.apache.org'], > 'ambari_server_host': ['c6401.ambari.apache.org'], 'zookeeper_hosts': [' > c6402.ambari.apache.org', 'c6403.ambari.apache.org', ' > c6401.ambari.apache.org'], 'hawqstandby_hosts': ['c6402.ambari.apache.org > ']} > > Thanks, > Bhuvnesh Chaudhary > Email: bchau <[email protected]>[email protected] > Desk: +1-650-846-1696 | Mobile: +1-973-906-6976 > > On Wed, Dec 9, 2015 at 12:53 PM, Christopher Jackson < > [email protected]> wrote: > >> Hi All, >> >> Does the core ambari.resource.management python scripts provide any >> mechanism for checking if a given service is installed? For instance how >> would I go about setting a flag whether or not Knox is installed in the >> params.py file for a custom service? >> >> Regards, >> Christopher Jackson > > > >
