An example systemd service for TeamCity

teamcity.service

[Unit]
After=postgresql.service
Description=JetBrains TeamCity
Requires=postgresql.service
Wants=network-online.target

# Can be included to allow a server to write to its own files.
[Service]
CacheDirectory=jetbrains/teamcity
ConfigurationDirectory=jetbrains/teamcity
# Lightly sandbox the service in the classical UNIX way, but without needing to clean up the user/group afterwards.
# See: http://0pointer.net/blog/dynamic-users-with-systemd.html
DynamicUser=yes
# Some servers want to write to $HOME even though conventionally UNIX services don't have one.
# https://www.jetbrains.com/help/teamcity/installing-and-configuring-the-teamcity-server.html#Setting+Up+Memory+settings+for+TeamCity+Server
Environment=HOME=/var/lib/jetbrains/teamcity
# Some servers want to write to $HOME even though conventionally UNIX services don't have one.
# https://www.jetbrains.com/help/teamcity/installing-and-configuring-the-teamcity-server.html#Setting+Up+Memory+settings+for+TeamCity+Server
Environment=TEAMCITY_SERVER_MEM_OPTS=-Xmx2048m
ExecStart=/usr/lib/jetbrains/teamcity/bin/teamcity-server.sh run
# The ! mark here makes the script run as root but after uid/gid allocation is done.
ExecStartPre=!/bin/sh -c "chown -R --preserve-root -h jetbrains-teamcity:jetbrains-teamcity /usr/lib/jetbrains/teamcity"
ExecStop=/usr/lib/jetbrains/teamcity/bin/teamcity-server.sh stop
Group=jetbrains-teamcity
LogsDirectory=jetbrains/teamcity
ReadWritePaths=+/usr/lib/jetbrains/teamcity
# Restart the service if it crashes, is OOM killed etc, but not if it quits with a non-zero exit code
# (which probably implies a bad configuration file or similar).
Restart=on-abnormal
StateDirectory=jetbrains/teamcity
# Type=exec has more much sensible behaviour than Type=simple. Also the systemd maintainer stated in a talk in 2018 that
# 'exec' is the right way to go, and opt-in only for compatibility reasons.
# https://media.ccc.de/v/ASG2018-230-systemd_in_2018#t=491
Type=exec
User=jetbrains-teamcity
WorkingDirectory=/usr/lib/jetbrains/teamcity

[Install]
WantedBy=default.target