Systemd unit for multiprocess sidekiq. Based on example unit from official sidekiq page on GitHub.

sidekiq@.service

# https://github.com/mperham/sidekiq/blob/master/examples/systemd/sidekiq.service
#
# systemd unit file for CentOS 7, Ubuntu 15.04
#
# Customize this file based on your bundler location, app directory, etc.
# Put this in /usr/lib/systemd/system (CentOS) or /lib/systemd/system (Ubuntu).
# Run:
#   - systemctl enable sidekiq
#   - systemctl {start,stop,restart} sidekiq
#
# This file corresponds to a single Sidekiq process.  Add multiple copies
# to run multiple processes (sidekiq-1, sidekiq-2, etc).
#
# See Inspeqtor's Systemd wiki page for more detail about Systemd:
# https://github.com/mperham/inspeqtor/wiki/Systemd
#
[Unit]
Description="(sidekiq-%i) process of GettUI dev env"
# start us only once the networkm logging subsystems and redis server are available
After=syslog.target network.target redis-server.service

# See these pages for lots of options:
# http://0pointer.de/public/systemd-man/systemd.service.html
# http://0pointer.de/public/systemd-man/systemd.exec.html
[Service]
Type=simple
WorkingDirectory=/var/www/project_name/current
# NOTE:
#   - on multiprocess system potentially we can use 'taskset -c'
#   - in case of split queues across processes we can add %i to confg name
ExecStart=/home/deploy/.rvm/bin/rvm 2.4.6@gett do bundle exec sidekiq --index %i --environment dev --config /var/www/project_name/current/config/sidekiq.yml
User=deploy
Group=sudo
UMask=0002

# Memory management
MemoryAccounting=true
MemoryHigh=35%
MemoryMax=50%

# Greatly reduce Ruby memory fragmentation and heap usage
# https://www.mikeperham.com/2018/04/25/taming-rails-memory-bloat/
Environment=MALLOC_ARENA_MAX=2

# if we crash, restart
RestartSec=1
Restart=on-failure

# NOTE: %i can be added to config name too, or you can use jornalctl for this purpose and drop below two lines
# output goes to
StandardOutput=/var/www/project_name/shared/log/sidekiq.log
StandardError=/var/www/project_name/shared/log/sidekiq.log

# Prefix for log line in case of StandardOutput/StandardError equal to syslog, journal or kmsg
SyslogIdentifier=sidekiq-%i

[Install]
WantedBy=multi-user.target