[Unit]
Description=__APP__-sidekiq
After=network.target

[Service]
Type=simple
User=__APP__
WorkingDirectory=__FINALPATH__/live
Environment="__LD_PRELOAD__"
Environment="RAILS_ENV=production"
Environment="DB_POOL=25"
Environment="MALLOC_ARENA_MAX=2"
ExecStart=__RBENV_ROOT__/versions/__APP__/bin/bundle exec sidekiq -c 25
TimeoutSec=15
Restart=always
StandardError=syslog

# Sandboxing options to harden security
# Depending on specificities of your service/app, you may need to tweak these 
# .. but this should be a good baseline
# Details for these options: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
# We need to disable everything that implie NoNewPrivileges=yes else sidekiq
# can't deliver mail to YunoHost users. See #30 -Tagada
NoNewPrivileges=no
PrivateTmp=yes
#PrivateDevices=yes
#RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
#RestrictNamespaces=yes
#RestrictRealtime=yes
DevicePolicy=closed
ProtectSystem=full
ProtectControlGroups=yes
#ProtectKernelModules=yes
#ProtectKernelTunables=yes
#LockPersonality=yes
#SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap

# Denying access to capabilities that should not be relevant for webapps
# Doc: https://man7.org/linux/man-pages/man7/capabilities.7.html
CapabilityBoundingSet=~CAP_RAWIO CAP_MKNOD
CapabilityBoundingSet=~CAP_AUDIT_CONTROL CAP_AUDIT_READ CAP_AUDIT_WRITE
CapabilityBoundingSet=~CAP_SYS_BOOT CAP_SYS_TIME CAP_SYS_MODULE CAP_SYS_PACCT
CapabilityBoundingSet=~CAP_LEASE CAP_LINUX_IMMUTABLE CAP_IPC_LOCK
CapabilityBoundingSet=~CAP_BLOCK_SUSPEND CAP_WAKE_ALARM
CapabilityBoundingSet=~CAP_SYS_TTY_CONFIG
CapabilityBoundingSet=~CAP_MAC_ADMIN CAP_MAC_OVERRIDE
CapabilityBoundingSet=~CAP_NET_ADMIN CAP_NET_BROADCAST CAP_NET_RAW
CapabilityBoundingSet=~CAP_SYS_ADMIN CAP_SYS_PTRACE CAP_SYSLOG 

[Install]
WantedBy=multi-user.target