Add SLACK_CHANNEL env var to allow to customise the Slack channel ins…

…tead of the hardcoded #certificates
uschti · Aug 27, 2018 · f229e6a · f229e6a
1 parent ceab979
commit f229e6a
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Showing 4 changed files with 11 additions and 5 deletions.
diff --git a/Dockerfile b/Dockerfile
@@ -24,11 +24,13 @@ ARG GD_KEY=undefined
 ARG GD_SECRET=undefined
 ARG SLACK_URL=undefined
 ARG SLACK_DOMAIN_TITLE=undefined
+ARG SLACK_CHANNEL=undefined
 
 ENV GD_KEY $GD_KEY
 ENV GD_SECRET $GD_SECRET
 ENV SLACK_URL $SLACK_URL
 ENV SLACK_DOMAIN_TITLE $SLACK_DOMAIN_TITLE
+ENV SLACK_CHANNEL $SLACK_CHANNEL
 
 
 # Copy config and script files

diff --git a/README.md b/README.md
@@ -29,6 +29,7 @@ docker container run --rm -e GD_KEY=someMagicKey \
  -e GD_SECRET=theCorrespondingSecret \
  -e SLACK_URL=https://hooks.slack.com/services/XXXXXXXXXXX \
  -e SLACK_DOMAIN_TITLE=yourdomain.com \
+ -e SLACK_CHANNEL=#certificates \
  -v /data/certs:/data/certs \
  -v /data/keys:/data/keys \
  -v renew_certificates.conf:/data/letsencrypt/renew_certificates.conf \
@@ -44,6 +45,7 @@ docker container run --rm -e GD_KEY=someMagicKey \
 
 - **SLACK_URL**:				Slack incoming webhook URL
 - **SLACK_DOMAIN_TITLE**:		Slack title (to easily identify the domain)
+- **SLACK_CHANNEL**:		Slack channel
 
 ### Volumes
 - **/data/certs**:				Folder where the created certificate will be copied (example of created file: yourdomain.com.crt)

diff --git a/docker-compose.yml b/docker-compose.yml
@@ -8,6 +8,7 @@ services:
       GD_SECRET: theCorrespondingSecret
       SLACK_URL: https://hooks.slack.com/services/XXXXXXXXXXX
       SLACK_DOMAIN_TITLE: yourdomain.com
+      SLACK_CHANNEL: "#certificates"
     volumes:
       - /data/certs:/data/certs
       - /data/keys:/data/keys

diff --git a/renew_certificates.sh b/renew_certificates.sh
@@ -13,6 +13,7 @@ export LC_CTYPE="en_US.UTF-8"
 ## Slack URL
 SLACK_URL=$SLACK_URL
 SLACK_WEBHOOK_USERNAME=$SLACK_DOMAIN_TITLE
+SLACK_CHANNEL=$SLACK_CHANNEL
 
 ## Preconditions
 if [ "$EUID" -eq 0 ]; then
@@ -21,7 +22,7 @@ if [ "$EUID" -eq 0 ]; then
 LETSENCRYPT_BASEPATH="/data/letsencrypt"
 CONFIG_FILE="/data/letsencrypt/renew_certificates.conf"
 
-## Copy the domains to dehydrated config 
+## Copy the domains to dehydrated config
 cat $CONFIG_FILE > dehydrated/domains.txt
 
 ## Generate the certificates
@@ -49,11 +50,11 @@ while read d; do
 		expirationDate=$(openssl x509 -enddate -noout -in $CERT_FILE)
 		expirationDate=${expirationDate#*=}
 
-		curl -X POST --data-urlencode "payload={\"channel\": \"#certificates\", \"username\": \"$SLACK_WEBHOOK_USERNAME\", \"attachments\": [ { \"title\": \"*$DOMAIN*\", \"color\": \"good\", \"text\": \"Certificate successfully renewed! Next expiration date: *$expirationDate*\" } ], \"icon_url\": \"https://cdn.uschti.com/images/sdeiuhfeigf82788238bdhjkdsfb820923eguf4.png\"}" $SLACK_URL
+		curl -X POST --data-urlencode "payload={\"channel\": \"$SLACK_CHANNEL\", \"username\": \"$SLACK_WEBHOOK_USERNAME\", \"attachments\": [ { \"title\": \"*$DOMAIN*\", \"color\": \"good\", \"text\": \"Certificate successfully renewed! Next expiration date: *$expirationDate*\" } ], \"icon_url\": \"https://cdn.uschti.com/images/sdeiuhfeigf82788238bdhjkdsfb820923eguf4.png\"}" $SLACK_URL
 
 	else
 		echo "WARN: Cannot find Certificate: "$CERT_FILE" or privatekey: "$KEY_FILE"!!!"
-		curl -X POST --data-urlencode "payload={\"channel\": \"#certificates\", \"username\": \"$SLACK_WEBHOOK_USERNAME\", \"attachments\": [ { \"title\": \"*$DOMAIN*\", \"color\": \"warning\", \"text\": \"Cannot find Certificate: "$CERT_FILE" or privatekey: "$KEY_FILE"!!! \" } ], \"icon_url\": \"https://cdn.uschti.com/images/sdeiuhfeigf82788238bdhjkdsfb820923eguf4.png\"}" $SLACK_URL
+		curl -X POST --data-urlencode "payload={\"channel\": \"$SLACK_CHANNEL\", \"username\": \"$SLACK_WEBHOOK_USERNAME\", \"attachments\": [ { \"title\": \"*$DOMAIN*\", \"color\": \"warning\", \"text\": \"Cannot find Certificate: "$CERT_FILE" or privatekey: "$KEY_FILE"!!! \" } ], \"icon_url\": \"https://cdn.uschti.com/images/sdeiuhfeigf82788238bdhjkdsfb820923eguf4.png\"}" $SLACK_URL
 	fi
 done <$CONFIG_FILE
 echo "INFO: DONE to move the certificates and keys to /data/certs and /data/keys !"
@@ -62,12 +63,12 @@ echo "INFO: DONE with certificate renew!"
 
 else
   echo "ERROR: Please run script as root!"
-  curl -X POST --data-urlencode "payload={\"channel\": \"#certificates\", \"username\": \"$SLACK_WEBHOOK_USERNAME\", \"attachments\": [ { \"title\": \"*$DOMAIN*\", \"color\": \"danger\", \"text\": \"Please run script as root! \" } ], \"icon_url\": \"https://cdn.uschti.ch/images/sdeiuhfeigf82788238bdhjkdsfb820923eguf4.png\"}" $SLACK_URL
+  curl -X POST --data-urlencode "payload={\"channel\": \"$SLACK_CHANNEL\", \"username\": \"$SLACK_WEBHOOK_USERNAME\", \"attachments\": [ { \"title\": \"*$DOMAIN*\", \"color\": \"danger\", \"text\": \"Please run script as root! \" } ], \"icon_url\": \"https://cdn.uschti.ch/images/sdeiuhfeigf82788238bdhjkdsfb820923eguf4.png\"}" $SLACK_URL
 fi
 
 ## Log End date
 echo ""
 echo "----------------------------------------"
 echo "End date: "`date`
 echo "----------------------------------------------------------------------------------------------------"
-echo ""
+echo ""