ReadMeABook: start the scheduler with the service (#17950)

Only GET /api/init creates the scheduled jobs and starts the scheduler; upstream's image calls it after every start, the LXC never did (#17945). An ExecStartPost hook now waits for the app and Redis like app-start.sh, and update adds it to existing installs.

ct/readmeabook.sh

@@ -31,6 +31,28 @@ function update_script() {
     exit
   fi
 
+  if ! grep -q '^ExecStartPost=-/usr/local/bin/readmeabook-init$' /etc/systemd/system/readmeabook.service; then
+    msg_info "Starting the scheduler with the service"
+    cat <<'EOF' >/usr/local/bin/readmeabook-init
+#!/usr/bin/env bash
+# Upstream's image calls /api/init after every start: it creates the scheduled jobs and starts the scheduler
+url="http://127.0.0.1:${PORT:-3030}"
+for _ in $(seq 1 60); do curl -sf -o /dev/null "$url/api/health" && break; sleep 1; done
+for _ in $(seq 1 30); do [[ "$(redis-cli ping 2>/dev/null)" == PONG ]] && break; sleep 1; done
+for attempt in 1 2 3 4 5; do
+  curl -sf -o /dev/null "$url/api/init" && exit 0
+  sleep "$attempt"
+done
+echo "ReadMeABook did not answer /api/init, scheduled jobs will not run" >&2
+exit 1
+EOF
+    chmod +x /usr/local/bin/readmeabook-init
+    sed -i '/^ExecStart=/a ExecStartPost=-/usr/local/bin/readmeabook-init\nTimeoutStartSec=180' /etc/systemd/system/readmeabook.service
+    systemctl daemon-reload
+    systemctl restart readmeabook
+    msg_ok "Started the scheduler with the service"
+  fi
+
   if check_for_gh_release "readmeabook" "kikootwo/ReadMeABook"; then
     msg_info "Stopping Service"
     systemctl stop readmeabook

install/readmeabook-install.sh

@@ -63,6 +63,20 @@ fi
 msg_ok "Built ReadMeABook"
 
 msg_info "Creating Service"
+cat <<'EOF' >/usr/local/bin/readmeabook-init
+#!/usr/bin/env bash
+# Upstream's image calls /api/init after every start: it creates the scheduled jobs and starts the scheduler
+url="http://127.0.0.1:${PORT:-3030}"
+for _ in $(seq 1 60); do curl -sf -o /dev/null "$url/api/health" && break; sleep 1; done
+for _ in $(seq 1 30); do [[ "$(redis-cli ping 2>/dev/null)" == PONG ]] && break; sleep 1; done
+for attempt in 1 2 3 4 5; do
+  curl -sf -o /dev/null "$url/api/init" && exit 0
+  sleep "$attempt"
+done
+echo "ReadMeABook did not answer /api/init, scheduled jobs will not run" >&2
+exit 1
+EOF
+chmod +x /usr/local/bin/readmeabook-init
 cat <<EOF >/etc/systemd/system/readmeabook.service
 [Unit]
 Description=ReadMeABook
@@ -75,6 +89,8 @@ User=root
 WorkingDirectory=/opt/readmeabook
 EnvironmentFile=/opt/readmeabook/.env
 ExecStart=${START_CMD}
+ExecStartPost=-/usr/local/bin/readmeabook-init
+TimeoutStartSec=180
 Restart=on-failure
 RestartSec=10