Upgrade to version 1.0.0 with improved features

Dockerfile

@@ -1,6 +1,12 @@
 FROM nginx:1.21.4-alpine
 
+RUN mkdir -p /nginx
+COPY nginx-http-redir.conf /nginx/default.conf
+
+# For renewing the certificates
+COPY renew_cert.sh /etc/periodic/daily/
+
 RUN apk update && apk add certbot bind-tools
 
-COPY entrypoint.sh nginx-http-redir.conf /
+COPY entrypoint.sh  /
 CMD ["/entrypoint.sh"]

README.md

@@ -7,6 +7,8 @@ The assumption is that you can point the DNS name to the container
 from outside. This is by default given for **IPv6 only kubernetes
 services**.
 
+The source of this image can be found on
+[code.ungleich.ch](https://code.ungleich.ch/ungleich-public/ungleich-certbot).
 
 ## Usage
 
@@ -21,66 +23,51 @@ services**.
   certificates, so that non-root users can access the certificates.
   Set the LEAVE_PERMISSIONS_AS_IS environment variable to instruct the
   container not to change permissions
-* If you setup the variable NGINX to any value, the container will
-  start nginx and reload after trying to renew the certificate
-* If you set the variable NGINX_HTTP_REDIRECT, the container will
-  enable automatic redirect of http to https with the exception of the
-  path /.well-known/acme-challenge/
+* If you setup the variable NO_NGINX to any value, the container will
+  NOT start nginx and use certbot in standalone mode
 
 
 ```
 docker run -e DOMAIN=example.com \
            -e EMAIL=root@example.com \
-              ungleich/ungleich-certbot
+              ungleich/ungleich-certbot:1.0.0
 ```
 
-### Nginx support
+### Production certificate
 
-Using
+Use
 
 ```
 docker run -e DOMAIN=example.com \
            -e EMAIL=root@example.com \
-           -e NGINX=yes \
            -e STAGING=no \
-              ungleich/ungleich-certbot
+              ungleich/ungleich-certbot:1.0.0
 ```
 
 you will get a proper, real world usable nginx server. Inject the
 nginx configuration by meains of a volume to /etc/nginx/conf.d
 
-### Nginx HTTP redirect support
-
-Using
-
-```
-docker run -e DOMAIN=example.com \
-           -e EMAIL=root@example.com \
-           -e NGINX=yes \
-           -e NGINX_HTTP_REDIRECT=yes \
-           -e STAGING=no \
-              ungleich/ungleich-certbot
-```
-
-the container will listen on port 80 and redirect the traffic to port
-443 (https).
-
 ### 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
+certificate every day. If you set the environment variable
 `ONLYGETCERT`, then it will only get the certificates and exit.
 
-### Only renewing the certificate
+This mode can be used
+as a [kubernetes Job](https://kubernetes.io/docs/concepts/workloads/controllers/job/).
+
+### Only renewing the certificate once
 
 If you only want to trigger renewing existing certificates and skip
 getting the certificates initially, you can set the variable
 `RENEWCERTSONCE`, then it will only renew all certificates and exit.
 
-* If `ONLYRENEWCERTS` is set, only the reguler renew loop will run.
 * If `ONLYRENEWCERTSONCE` is set, renew will be run once and then the
   container exits
 
+This mode can be used
+as a [kubernetes Job](https://kubernetes.io/docs/concepts/workloads/controllers/job/).
+
 ## Volumes
 
 If you want to keep / use your certificates, you are advised to create
@@ -88,9 +75,30 @@ a volume below /etc/letsencrypt.
 
 ## Changelog
 
-* 0.1.0: usable with automatic renewal
-* 0.2.0: added support for nginx webserver (based on official nginx
-  image)
+### 0.1.0
+
+
+Usable with automatic renewal
+
+### 0.2.0
+
+Added support for nginx webserver, based on official nginx image
+
+### 1.0.0
+
+- Start nginx in foreground, if not opted out
+  - Nicely shows erros of nginx starting, which is what we need
+- Starting nginx by default on port 80
+- Removed variable NGINX to start nginx
+- Introducted variable NO_NGINX to prevent nginx from starting
+- Changed the wait time for domain resolution test to every 2 seconds
+  - helps to startup faster
+- Added directory /nginx from which configuration files are sourced
+  - can be used to overwrite built-in configurations
+- Create file /tmp/last_renew for checking when
+- Dropped support for NGINX_HTTP_REDIRECT (always enabled with nginx
+  now) -- can be overwritten by overriding /nginx directory
+- Dropped support for ONLYRENEWCERTS - this is covered by NO_NGINX already
 
 ## Kubernetes
 

entrypoint.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
 
+
 if [ -z "$DOMAIN" -o -z "$EMAIL" ]; then
     echo Missing DOMAIN or EMAIL parameter - aborting. >&2
     exit 1
@@ -18,8 +19,8 @@ while [ -z "$ipv6_addr" -a -z "$ipv4_addr"  ]; do
     if [ "$ipv6_addr" -o "$ipv4_addr" ]; then
         echo "Resolved domain $DOMAIN: ipv6: $ipv6_addr ipv4: $ipv4_addr"
     else
-        echo "Resolving $DOMAIN failed, waiting 5 seconds before retrying ..."
-        sleep 5
+        echo "Resolving $DOMAIN failed, waiting 2 seconds before retrying ..."
+        sleep 2
     fi
 done
 
@@ -55,34 +56,16 @@ if [ "$ONLYGETCERT" ]; then
     exit 0
 fi
 
-# Still there? Start nginx if requested
-
-if [ "$NGINX" ]; then
-
-    if [ "$NGINX_HTTP_REDIRECT" ]; then
-        cp /nginx-http-redir.conf /etc/nginx/conf.d
-    fi
-    nginx
-fi
-
-# Try to renew once per day
-while true; do
-    if [ "$NGINX_HTTP_REDIRECT" ]; then
-        /usr/bin/certbot renew --webroot --webroot-path /var/www/html
-    else
-        /usr/bin/certbot renew
-    fi
-
-    # And again, correct permissions if not told otherwise
-    if [ -z "$LEAVE_PERMISSIONS_AS_IS" ]; then
-        find /etc/letsencrypt -type d -exec chmod 0755 {} \;
-        find /etc/letsencrypt -type f -exec chmod 0644 {} \;
-    fi
+# Before starting nginx, try to renew to ensure we are up-to-date
+# This is necessary for container restarts not to delay a needed renew
+/usr/bin/certbot renew --standalone
 
+# If it requested to renew once only we are done here
 [ "$ONLYRENEWCERTSONCE" ] && exit 0
 
-    # reload nginx if we are running it
-    [ "$NGINX" ] && pkill -1 nginx
-
-    sleep 86400
-done
+if [ "$NO_NGINX" ]; then
+    sleep infinity
+else
+    cp /nginx/* /etc/nginx/conf.d
+    nginx -g "daemon off;"
+fi

get_cert.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+while [ ! -f "/etc/letsencrypt/live/${DOMAIN}/fullchain.pem" ]; do
+    certbot certonly --agree-tos --cert-name "${DOMAIN}" \
+            --email "$EMAIL" --expand --non-interactive \
+            --domain "$DOMAIN" --standalone $STAGING
+
+    # If it failed, sleep before next try
+    if [ ! -f "/etc/letsencrypt/live/${DOMAIN}/fullchain.pem" ]; then
+        sleep 30
+    fi
+
+    # Correct permissions for multi user container/pod deployments
+    # if not indicated otherwise
+    if [ -z "$LEAVE_PERMISSIONS_AS_IS" ]; then
+        find /etc/letsencrypt -type d -exec chmod 0755 {} \;
+        find /etc/letsencrypt -type f -exec chmod 0644 {} \;
+    fi
+done

renew_cert.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+if [ "$NO_NGINX" ]; then
+    /usr/bin/certbot renew --standalone
+else
+    /usr/bin/certbot renew --webroot --webroot-path /var/www/html
+    # Reload nginx
+    pkill -1 nginx
+fi
+
+# Correct permissions if not told otherwise
+if [ -z "$LEAVE_PERMISSIONS_AS_IS" ]; then
+    find /etc/letsencrypt -type d -exec chmod 0755 {} \;
+    find /etc/letsencrypt -type f -exec chmod 0644 {} \;
+fi
+
+echo "Last renew: $(date)" > /tmp/last_renew