Integrate haproxy service in MapR Control System 

This post was originally published on this site

If you would like to create your own MapR Service under the control of warden here’s an example based on a haproxy configuration how to achieve this.

The method should work for any other service as well

create new role

$ touch /opt/mapr/roles/haproxy

create new warden service configuration

$ vi /opt/mapr/conf/conf.d/warden.haproxy.conf

services=haproxy:all:cldb
service.displayname=haproxy
service.command.start=/home/mapr/start_haproxy.sh
service.command.stop=/home/mapr/stop_haproxy.sh
service.command.type=BACKGROUND
service.command.monitorcommand=/home/mapr/status_haproxy.sh
service.port=9999
service.uri=about
service.logs.location=/var/log/haproxy/
service.process.type=BINARY

save the file and check the permissions (should be 644)

$ pwd
/opt/mapr/conf/conf.d

$ ls -la warden.haproxy.conf
-rw-r--r-- 1 mapr mapr 398 Oct 4 14:21 warden.haproxy.conf

create the scripts referenced in /opt/mapr/conf/conf.d/warden.haproxy.conf

$ pwd
/home/mapr/scripts

$ cat stop_haproxy.sh
#stop haproxy
sudo systemctl stop haproxy

$ cat start_haproxy.sh
#start haproxy
sudo systemctl start haproxy

$ cat status_haproxy.sh
#status haproxy
sudo systemctl status haproxy

reconfigure MapR System

$ /opt/mapr/server/configure.sh -R

If the configuration was successful the newly created haproxy service should be visible in MapR Control System and also via command line

$ maprcli service list -node $(hostname)

logpath             displayname name      memallocated  state

[...]

/var/log/haproxy/   haproxy     haproxy   Auto          2

[...]

Now you should also be able to start and stop the haproxy with maprcli commands.

$ maprcli node services -action start haproxy -nodes <node-name>

$ maprcli node services -action stop haproxy -nodes <node-name>

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