1 files changed, 107 insertions, 0 deletions
diff --git a/docker/auto-certbot/daemon.bash b/docker/auto-certbot/daemon.bash
new file mode 100755
index 0000000..d79387e
--- /dev/null
+++ b/docker/auto-certbot/daemon.bash
@@ -0,0 +1,107 @@
+#!/usr/bin/env bash
+
+set -e
+
+# Check I'm root.
+if [[ $EUID -ne 0 ]]; then
+    echo "This script must be run as root" 1>&2
+    exit 1
+fi
+
+# Check certbot version.
+certbot --version
+
+# Check domain
+if [[ -z "$CRUPEST_DOMAIN" ]]; then
+    echo "CRUPEST_DOMAIN can't be empty!" 1>&2
+    exit 1
+fi
+
+# Check email
+if [[ -z "$CRUPEST_EMAIL" ]]; then
+    echo "CRUPEST_EMAIL can't be empty!" 1>&2
+    exit 2
+fi
+
+# Check CRUPEST_CERT_PATH, default to /etc/letsencrypt/live/$CRUPEST_DOMAIN/fullchain.pem
+if [ -z "$CRUPEST_CERT_PATH" ]; then
+    CRUPEST_CERT_PATH="/etc/letsencrypt/live/$CRUPEST_DOMAIN/fullchain.pem"
+fi
+
+# Check CRUPEST_CERT_PATH exists.
+if [ ! -f "$CRUPEST_CERT_PATH" ]; then
+    echo "Cert file does not exist. You may want to generate it manually with aio script." 1>&2
+    exit 3
+fi
+
+echo "Root domain:" "$CRUPEST_DOMAIN"
+echo "Email:" "$CRUPEST_EMAIL"
+echo "Cert path: ${CRUPEST_CERT_PATH}"
+
+# Check CRUPEST_AUTO_CERTBOT_RENEW_COMMAND is defined.
+if [ -z "$CRUPEST_AUTO_CERTBOT_RENEW_COMMAND" ]; then
+    echo "CRUPEST_AUTO_CERTBOT_RENEW_COMMAND is not defined or empty. Will use the default one."
+else
+    printf "CRUPEST_AUTO_CERTBOT_RENEW_COMMAND is defined as:\n%s\n" "$CRUPEST_AUTO_CERTBOT_RENEW_COMMAND"
+fi
+
+domains_str="$(/get-cert-domains.py "${CRUPEST_CERT_PATH}")"
+
+printf "Domain list:\n%s\n" "$domains_str" 
+
+mapfile -t domains <<< "$domains_str"
+
+for domain in "${domains[@]}"; do
+    domain_options=("${domain_options[@]}" -d "$domain") 
+done
+
+options=(-n --agree-tos -m "$CRUPEST_EMAIL" --webroot -w /var/www/certbot "${domain_options[@]}")
+if [ -n "$CRUPEST_AUTO_CERTBOT_POST_HOOK" ]; then
+    printf "You have defined a post hook:\n%s\n" "$CRUPEST_AUTO_CERTBOT_POST_HOOK"
+    options=("${options[@]}" --post-hook "$CRUPEST_AUTO_CERTBOT_POST_HOOK")
+fi
+
+# Use test server to test.
+certbot certonly --force-renewal --test-cert --dry-run "${options[@]}"
+
+function check_and_renew_cert {
+    expire_info=$(openssl x509 -enddate -noout -in "$CRUPEST_CERT_PATH")
+    
+    # Get ssl certificate expire date.
+    expire_date=$(echo "$expire_info" | cut -d= -f2)
+
+    echo "SSL certificate expire date: $expire_date"
+
+    # Convert expire date to UNIX timestamp.
+    expire_timestamp="$(date -d "$expire_date" +%s)"
+
+    # Minus expire timestamp with 30 days in UNIX timestamp.
+    renew_timestamp="$((expire_timestamp - 2592000))"
+    echo "Renew SSL certificate at: $(date -d @$renew_timestamp)"
+
+    # Get rest time til renew.
+    rest_time_in_second="$((renew_timestamp - $(date +%s)))"
+    rest_time_in_day=$((rest_time_in_second / 86400))
+    echo "Rest time til renew: $rest_time_in_second seconds, aka, about $rest_time_in_day days"
+
+    # Do we have rest time?
+    if [ $rest_time_in_second -gt 0 ]; then
+        # Sleep 1 hour.
+        echo "I'm going to sleep for 1 day to check again."
+        sleep 1d
+    else
+        # No, renew now.
+        echo "Renewing now..."
+
+        if [ -n "$CRUPEST_AUTO_CERTBOT_RENEW_COMMAND" ]; then
+            $CRUPEST_AUTO_CERTBOT_RENEW_COMMAND
+        else
+            certbot certonly "${options[@]}"
+        fi
+    fi
+}
+
+# Run check_and_renew_cert in infinate loop.
+while true; do
+    check_and_renew_cert
+done