From d6407cdf7db83112b64806b88e4c5d3a8b733290 Mon Sep 17 00:00:00 2001
From: Nico Schottelius <nico@nico-notebook.schottelius.org>
Date: Mon, 19 Jul 2021 22:56:51 +0200
Subject: [PATCH] Add support for only running once

---
 README.md     | 8 +++++++-
 entrypoint.sh | 4 ++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ab36ae0..c5ceae9 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,12 @@ docker run -e DOMAIN=example.com \
               ungleich/ungleich-certbot
 ```
 
+### Exiting after getting the certificate
+
+By default, the container will stay alive and try to renew the
+certificate every 86400 seconds. If you set the environment variable
+`ONLYGETCERT`, then it will only get the certificates and exit.
+
 ## Volumes
 
 If you want to keep / use your certificates, you are advised to create
@@ -35,4 +41,4 @@ a volume below /etc/letsencrypt.
 
 ## Kubernetes
 
-Sample kubernetes usage: (TBD)
+See https://code.ungleich.ch/ungleich-public/ungleich-k8s/.
diff --git a/entrypoint.sh b/entrypoint.sh
index 981dc27..a4f953d 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -26,6 +26,10 @@ while [ ! -f "/etc/letsencrypt/live/${DOMAIN}/fullchain.pem" ]; do
     fi
 done
 
+if [ "$ONLYGETCERT" ]; then
+    exit 0
+fi
+
 # Try to renew once per day
 while true; do
     /usr/bin/certbot renew