Merge pull request #9 from samply/feature/fetchSecretsFromVault

Auto-fetch sensitive variables from vault.

bridgehead

@@ -46,6 +46,7 @@ source /etc/bridgehead/site.conf
 case "$ACTION" in
 	start)
 		checkRequirements
+		fetchVarsFromVault /etc/bridgehead/site.conf /etc/bridgehead/$PROJECT.env || exit 1
 		exec docker-compose -f ./$PROJECT/docker-compose.yml --env-file /etc/bridgehead/$PROJECT.env up
 		;;
 	stop)

lib/functions.sh

@@ -23,3 +23,43 @@ checkRequirements() {
 		return 0
 	fi
 }
+
+fetchVarsFromVault() {
+	VARS_TO_FETCH=""
+
+	for line in $(cat $@); do
+		if [[ $line =~ .*=\<VAULT\>.* ]]; then
+			VARS_TO_FETCH+="$(echo -n $line | sed 's/=.*//') "
+		fi
+	done
+
+	if [ -z "$VARS_TO_FETCH" ]; then
+		return 0
+	fi
+
+	log INFO "Fetching secrets from vault ..."
+
+	[ -e /etc/bridgehead/vault.conf ] && source /etc/bridgehead/vault.conf
+
+	if [ -z "$BW_MASTERPASS" ] || [ -z "$BW_CLIENTID" ] || [ -z "$BW_CLIENTSECRET" ]; then
+		log ERROR "Please supply correct credentials in /etc/bridgehead/vault.conf."
+		return 1
+	fi
+
+	set +e
+
+	PASS=$(BW_MASTERPASS="$BW_MASTERPASS" BW_CLIENTID="$BW_CLIENTID" BW_CLIENTSECRET="$BW_CLIENTSECRET" docker run --rm -ti -e BW_MASTERPASS -e BW_CLIENTID -e BW_CLIENTSECRET -e http_proxy samply/bridgehead-vaultfetcher $VARS_TO_FETCH)
+	RET=$?
+
+	if [ $RET -ne 0 ]; then
+		echo "Code: $RET"
+		echo $PASS
+		return $RET
+	fi
+
+	eval $(echo -e "$PASS" | sed 's/\r//g')
+
+	set -e
+
+	return 0
+}

lib/prerequisites.sh

@@ -69,6 +69,13 @@ if [ ! -e "certs/traefik.crt" ]; then
   openssl req -x509 -newkey rsa:4096 -nodes -keyout certs/traefik.key -out certs/traefik.crt -days 3650 -subj "/CN=$HOST"
 fi
 
+if [ -e /etc/bridgehead/vault.conf ]; then
+	if [ "$(stat -c "%a %U" /etc/bridgehead/vault.conf)" != "600 bridgehead" ]; then
+		log ERROR "/etc/bridgehead/vault.conf has wrong owner/permissions. To correct this issue, run chmod 600 /etc/bridgehead/vault.conf && chown bridgehead /etc/bridgehead/vault.conf."
+		exit 1
+	fi
+fi
+
 log INFO "Success - all prerequisites are met!"
 
 exit 0