Fixes Docker entrypoint script for smallstep/cli#537

docker/entrypoint.sh

@@ -7,24 +7,6 @@ set -eo pipefail
 
 export STEPPATH=$(step path)
 
-# List of env vars required for step ca init
-declare -ra REQUIRED_INIT_VARS=(DOCKER_STEPCA_INIT_NAME DOCKER_STEPCA_INIT_DNS_NAMES)
-
-# Ensure all env vars required to run step ca init are set.
-function init_if_possible () {
-    local missing_vars=0
-    for var in "${REQUIRED_INIT_VARS[@]}"; do
-        if [ -z "${!var}" ]; then
-            missing_vars=1
-        fi
-    done
-    if [ ${missing_vars} = 1 ]; then
-		>&2 echo "there is no ca.json config file; please run step ca init, or provide config parameters via DOCKER_STEPCA_INIT_ vars"
-    else
-        step_ca_init "${@}"
-    fi
-}
-
 function generate_password () {
     set +o pipefail
     < /dev/urandom tr -dc A-Za-z0-9 | head -c40
@@ -35,8 +17,7 @@ function generate_password () {
 # Initialize a CA if not already initialized
 function step_ca_init () {
     local -a setup_args=(
-        --name "${DOCKER_STEPCA_INIT_NAME}"
-		--dns "${DOCKER_STEPCA_INIT_DNS_NAMES}"
+        --name "${DOCKER_STEPCA_INIT_NAME:-Smallstep}"
 		--provisioner "${DOCKER_STEPCA_INIT_PROVISIONER_NAME:-admin}"
 		--password-file "${STEPPATH}/password"
         --address ":9000"
@@ -46,15 +27,27 @@ function step_ca_init () {
     else
         generate_password > "${STEPPATH}/password"
     fi
+
     if [ -n "${DOCKER_STEPCA_INIT_SSH}" ]; then
         setup_args=("${setup_args[@]}" --ssh)
     fi
-    step ca init "${setup_args[@]}"
+
+    if [ -n "${DOCKER_STEPCA_INIT_DNS_NAMES}" ]; then
+		setup_args=("$[setup_args[@]}" --dns "localhost" --dns "127.0.0.1" --dns "[::1]")
+	fi	
+
+	IFS=',' read -r -a dns_names <<< "${DOCKER_STEPCA_INIT_DNS_NAMES}"
+	for dns_name in "${dns_names[@]}"
+	do
+		setup_args=("${setup_args[@]}" --dns "$dns_name")
+	done
+	step ca init "${setup_args[@]}"
     mv $STEPPATH/password $PWDPATH
 }
 
 if [ ! -f "${STEPPATH}/config/ca.json" ]; then
-	init_if_possible
+	>&2 echo "There is no ca.json config file; running 'step ca init'."
+	step_ca_init "${@}"
 fi
 
 exec "${@}"