mastodon_ynh/conf/mastodon-web.service

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

[Service]
Type=simple
User=__APP__
WorkingDirectory=__INSTALL_DIR__/live
Environment="RAILS_ENV=production"
Environment="PORT=__PORT_WEB__"
Environment="__LD_PRELOAD__"
Environment="__YNH_RUBY_LOAD_PATH__"
ExecStart=__INSTALL_DIR__/live/bin/bundle exec puma -C config/puma.rb
ExecReload=/bin/kill -SIGUSR1 $MAINPID
TimeoutSec=15
Restart=always
StandardOutput=append:/var/log/__APP__/__APP__-web.log
StandardError=inherit

# Proc filesystem
# Capabilities
# Security
NoNewPrivileges=true
# Sandboxing
ProtectSystem=full
PrivateTmp=true
PrivateDevices=true
ProtectKernelModules=true
ProtectKernelTunables=true
ProtectControlGroups=true
RestrictAddressFamilies=AF_INET
RestrictAddressFamilies=AF_INET6
RestrictAddressFamilies=AF_NETLINK
RestrictAddressFamilies=AF_UNIX
RestrictNamespaces=true
LockPersonality=true
RestrictRealtime=true
DevicePolicy=closed
# System Call Filtering
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