add ONE_SHOT so container exits after run

root/certbot-prepare.sh

@@ -761,9 +761,19 @@ then
     openssl dhparam -out /config/letsencrypt/keys/ssl-dhparams.pem 4096
 fi
 
-echo "$INTERVAL /certbot-renew.sh >> /config/logs/renew.log" > /config/.crontab.txt
+if [ $ONE_SHOT == "true" ]; then
 
-echo ""
+    echo ""
 
-echo "Starting automatic renewal job. Schedule is $INTERVAL"
-crontab /config/.crontab.txt
+    echo "ONE_SHOT is true - exiting container"
+
+elif [ $ONE_SHOT == "false" ]; then
+
+    echo "$INTERVAL /certbot-renew.sh >> /config/logs/renew.log" > /config/.crontab.txt
+
+    echo ""
+
+    echo "Starting automatic renewal job. Schedule is $INTERVAL"
+    crontab /config/.crontab.txt
+
+fi

root/check-one-shot.sh

@@ -0,0 +1,9 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+
+if [ $ONE_SHOT == "true" ]; then
+
+    # Cleanly kill container by sending kill signal to supervisor process
+    kill 1
+
+fi

root/container-init.sh

@@ -28,6 +28,7 @@ echo \
 "PUID=${PUID}
 PGID=${PGID}
 TZ=${TZ}
+ONE_SHOT=${ONE_SHOT}
 INTERVAL=${INTERVAL}
 GENERATE_DHPARAM=${GENERATE_DHPARAM}
 CERT_COUNT=${CERT_COUNT}"

root/etc/s6-overlay/s6-rc.d/check-one-shot/type

@@ -0,0 +1 @@
+oneshot

root/etc/s6-overlay/s6-rc.d/check-one-shot/up

@@ -0,0 +1 @@
+exec /check-one-shot.sh