You should be able to annotate your property like so:
<property>
<name>hadoop.security.key.provider.path</name>
<value></value>
<value-attributes>
<empty-value-valid>true</empty-value-valid>
</value-attributes>
…
</property>
Thanks,
Nate
From: Xiaoke Zhang <[email protected]>
Reply-To: "[email protected]" <[email protected]>
Date: Friday, June 3, 2016 at 7:28 PM
To: "[email protected]" <[email protected]>
Subject: optional (blankable) configuration in custom ambari stacks
Hi,
I am trying to create a custom stack for Ambari, I am using version 2.2.1.1 on
centos.
ambari-agent-2.2.1.1-70
ambari-server-2.2.1.1-70
One problem I ran into is creating an optionally empty parameter for my service.
srv_ssl_cert and srv_ssl_key. Both are optional. If you don't have it, the
service would then run it on http instead of https.
I tried to put this in my configuration.
-- metainfo.xml
<configuration-dependencies>
<config-type>my-config</config-type>
</configuration-dependencies>
--- my-config
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property require-input="false" >
<name>srv_ssl_cert</name>
<value></value>
<description>
Path on disk for SSL certificate in PEM format.
</description>
</property>
<property require-input="false" >
<name>srv_ssl_key</name>
<value></value>
<description>
Path on disk for SSL key in PEM format.
</description>
</property>
</configuration>
Unfortunately, it doesn't work. Even though some of the ambari workshop
examples uses require-input="false".
https://github.com/randerzander/r-service/blob/master/configuration/r-config.xml
I tried without the empty <value></value> , ambari just don't show any thing at
all.
I realize I can make it a special value like "none" or "n/a" or ship a with a
default self signed certificate. Just wondering if ambari has the capability
to support optional and "blank able" parameters.
Thanks for any advice.
