THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
| Code Block |
|---|
|_ stacks
|_ <stack_name>
|_ <stack_version>
metainfo.xml
|_ hooks
|_ repos
repoinfo.xml
|_ services
|_ <service_name>
metainfo.xml
metrics.json
|_ configuration
{configuration files}
|_ package
{files, scripts, templates} |
Defining a Service and Components
...
For example, in the YARN Service describes the ResourceManager component as follows in metainfo.xml:
| Code Block |
|---|
<component>
<name>RESOURCEMANAGER</name>
<category>MASTER</category>
<commandScript>
<script>scripts/resourcemanager.py</script>
<scriptType>PYTHON</scriptType>
<timeout>600</timeout>
</commandScript>
<customCommands>
<customCommand>
<name>DECOMMISSION</name>
<commandScript>
<script>scripts/resourcemanager.py</script>
<scriptType>PYTHON</scriptType>
<timeout>600</timeout>
</commandScript>
</customCommand>
</customCommands>
</component> |
The ResourceManager is a MASTER component, and the command script is scripts/resourcemanager.py, which can be found in the services/YARN/package directory. That command script is PYTHON and that script implements the default commands as python methods. This is the install method for the default install command:
...
| Code Block |
|---|
def decommission(self, env):
import params
...
Execute(yarn_refresh_cmd,
user=yarn_user
)
pass
|
...
Metrics
TBD