Fix connections to clouds (no ssh support) (#127)

* fix connection path if ssh not working

* fix regex for project names

* improve comment

Author: Nastradamus

check

@@ -248,7 +248,7 @@ validate_arg_type() {
        exit 1
     fi
   elif [ $type = "word" ]; then
-    re='^[a-zA-Z_-]+$'
+    re='^[a-zA-Z0-9_-]+$'
     if ! [[ $value =~ $re ]]; then
        err "'$name' = '$value' => is not a '$type' (${re})"
        exit 1
@@ -436,7 +436,7 @@ usage() {
       # additional info
       echo >&${out_descriptor}
       echo "Example:" >&${out_descriptor}
-      echo "./${SCRIPT_NAME} -h dev -p 5432 --username ${USER} --dbname postgres --project dummy" >&${out_descriptor}
+      echo "PGPASSWORD=postgres ./${SCRIPT_NAME} -h dev -p 5432 --username ${USER} --dbname postgres --project dummy" >&${out_descriptor}
       echo >&${out_descriptor}
       echo "Add more checks into './resources/checks/' directory." >&${out_descriptor}
       echo >&${out_descriptor}
@@ -676,7 +676,7 @@ check_bin_deps() {
 #######################################
 # Check rights, set global variables, etc.
 # Globals:
-#   HOST, CHECK_HOST_CMD
+#   HOST, CHECK_HOST_CMD, NATIVE_HOSTNAME
 # Arguments:
 #   None
 # Returns:
@@ -685,12 +685,20 @@ check_bin_deps() {
 host_pre_start_checks() {
   # choise host connection command
   # while checking ssh support
-  if (ssh $HOST "true" >/dev/null 2>&1); then
+  # and determine NATIVE_HOSTNAME (a host key in JSON reports)
+  if NATIVE_HOSTNAME=$(ssh $HOST "hostname" 2>/dev/null); then
+    # ssh to remote host and use local psql (default)
     export CHECK_HOST_CMD="ssh ${HOST}"
   else
+    NATIVE_HOSTNAME="${HOST}"
+    # swap ssh with bash
     export CHECK_HOST_CMD="bash -e -u -o pipefail -c"
+    # use local psql and connect to remote postgres without ssh
+    export _PSQL="${_PSQL} -h ${HOST}"
   fi
-  dbg "CHECK_HOST_CMD: ${CHECK_HOST_CMD}"
+  export NATIVE_HOSTNAME
+  dbg "CHECK_HOST_CMD: '${CHECK_HOST_CMD}'"
+  dbg "NATIVE_HOSTNAME: '$NATIVE_HOSTNAME'"
 }
 
 #######################################
@@ -784,7 +792,6 @@ update_nodes_json() {
   fi
 
   export ALIAS_NAME ALIAS_INDEX ROLE EPOCH
-  dbg "NATIVE_HOSTNAME: '$NATIVE_HOSTNAME'"
   dbg "ALIAS_NAME: '$ALIAS_NAME'"
   dbg "ALIAS_INDEX: '$ALIAS_INDEX'"
   dbg "ROLE: '$ROLE'"
@@ -832,13 +839,6 @@ update_nodes_json() {
 run_checks() {
   # perform pre-checks here
 
-  # get native hostname from remote host due to accurate
-  # mapping in the future
-  if ! NATIVE_HOSTNAME="$(${CHECK_HOST_CMD} "hostname")"; then
-    NATIVE_HOSTNAME="$HOST" 
-  fi
-  export NATIVE_HOSTNAME
-
   local pghrep_failed_jsons_stack=""
 
   # perform all checks from './resources/checks/' directory