Upstart to Systemd - ubuntu-16.04

Question

We have a .conf file named private-api.conf in the location /etc/init ,
So my file location is - /etc/init/private-api.conf
The contents of my file is as following -
# start when server starts
start on runlevel [23456]
# Stop when server shuts down/reboots
stop on shutdown
#Respawn the process if it crashes
#If it respawns more than 10 times in 5 seconds stop
respawn
respawn limit 10 5
#expect fork
script
cd /home/ubuntu/private-api && exec java -jar -Dspring.profiles.active=stage private-api-SNAPSHOT.jar > private-api.log 2>&1
end script
The next Command I need to fire is -
sudo initctl reload-configuration
After which I am supposed to run the Service, using the following command -
service private-api start/stop/restart/status
I get the following error when I do -
initctl: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused
I found that in Ubuntu 16.04 upstarts don't work and have moved to Systemd now,
And that the Systemd file needs to be in the location - /etc/systemd/system, with the file extension .service
After which to run the Systemd following 2 commands need to be fired -
1. sudo systemctl daemon-reload
2. sudo systemctl start xyz.service
I am referring the following links -
1. https://wiki.ubuntu.com/SystemdForUpstartUsers
2. https://www.digitalocean.com/community/tutorials/understanding-systemd-units-and-unit-files
Here's what I've achieved so far using the above refs -
[Unit]
Description=Upstart for Private API
After=network.target network-online.target
Wants=network-online.target
[Service]
User=root
WorkingDirectory=/home/ubuntu/private-api
ExecStart=/usr/bin/java -classpath home/ubuntu/private-api/private-api-0.0.1-SNAPSHOT.jar -Dspring.profiles.active=stage > home/ubuntu/private-api/private-api.log 2>&1
SuccessExitStatus=143
Restart=on-failure
RestartSec=120s
[Install]
WantedBy=multi-user.target
I reloaded my Systemd service -
sudo systemctl daemon-reload
But when I check service status, I get absolute path errors -
sudo systemctl status private-api.service
Apr 05 08:48:56 ip-10-10-1-153 systemd[1]: [/etc/systemd/system/private-api.service:9] Executable path is not absolute, ignoring: ExecStart=/usr/bin/java -classpath /home/ubuntu/private/astro-private-0.0.1-SNAPSHOT.jar -Dspring.profiles.active=dev > private.log 2>&1
Apr 05 08:48:56 ip-10-10-1-153 systemd[1]: private-api.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Apr 05 08:49:07 ip-10-10-1-153 systemd[1]: [/etc/systemd/system/private-api.service:9] Executable path is not absolute, ignoring: ExecStart=/usr/bin/java -classpath /home/ubuntu/private/astro-private-0.0.1-SNAPSHOT.jar -Dspring.profiles.active=dev > private.log 2>&1
Apr 05 08:49:07 ip-10-10-1-153 systemd[1]: private-api.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Apr 05 08:51:40 ip-10-10-1-153 systemd[1]: [/etc/systemd/system/private-api.service:9] Executable path is not absolute, ignoring: ExecStart=/usr/bin/java -classpath /home/ubuntu/private/astro-private-0.0.1-SNAPSHOT.jar -Dspring.profiles.active=dev > /home/ubuntu/private/private.log 2>&1
Apr 05 08:51:40 ip-10-10-1-153 systemd[1]: private-api.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Apr 05 09:17:41 ip-10-10-1-153 systemd[1]: [/etc/systemd/system/private-api.service:9] Executable path is not absolute, ignoring: ExecStart=/usr/bin/java -classpath /home/ubuntu/private/astro-private-0.0.1-SNAPSHOT.jar -Dspring.profiles.active=dev > /home/ubuntu/private/private.log 2>&1
Apr 05 09:17:41 ip-10-10-1-153 systemd[1]: private-api.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Apr 05 09:17:59 ip-10-10-1-153 systemd[1]: [/etc/systemd/system/private-api.service:9] Executable path is not absolute, ignoring: ExecStart=/usr/bin/java -classpath /home/ubuntu/private/astro-private-0.0.1-SNAPSHOT.jar -Dspring.profiles.active=dev > /home/ubuntu/private/private.log 2>&1
Apr 05 09:17:59 ip-10-10-1-153 systemd[1]: private-api.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Can someone help me convert my current upstart .conf script?

Answer 1

You have already set the WorkingDirectory, you can directly use the command from your script.
ExecStart=/usr/bin/java -jar -Dspring.profiles.active=stage > private-api.log 2>&1
Hopefully this works.