# PYRE / Prometheus Protocol — systemd unit to resurrect PM2 on boot.
#
# INERT until apps are deployed AND `pm2 save` has been run at least once:
#   `pm2 resurrect` only restores processes from the saved dump
#   (~/.pm2/dump.pm2). Without that dump it starts nothing.
#
# Install (run as a privileged user, once):
#   sudo cp /home/pyre/pyre/infra/systemd/pm2-pyre.service /etc/systemd/system/pm2-pyre.service
#   sudo systemctl daemon-reload
#   sudo systemctl enable pm2-pyre
#
# Then, after the apps are built and started:
#   pm2 start /home/pyre/pyre/ecosystem.config.cjs
#   pm2 save            # <-- REQUIRED: writes the dump that resurrect reads
#
# This unit runs PM2 as the unprivileged `pyre` user (no root daemon).

[Unit]
Description=PM2 process manager for PYRE (user pyre)
Documentation=https://pm2.keymetrics.io/
After=network-online.target postgresql.service redis-server.service
Wants=network-online.target

[Service]
Type=forking
User=pyre
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
Environment=PATH=/home/pyre/.local/share/pnpm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
Environment=PM2_HOME=/home/pyre/.pm2
PIDFile=/home/pyre/.pm2/pm2.pid
Restart=on-failure

ExecStart=/home/pyre/.local/share/pnpm/bin/pm2 resurrect
ExecReload=/home/pyre/.local/share/pnpm/bin/pm2 reload all
ExecStop=/home/pyre/.local/share/pnpm/bin/pm2 kill

[Install]
WantedBy=multi-user.target