Auto generate minimal environment variables doc

This script will generate the minimal-environment-variables doc
based on the what each services has in the check_required_var field.
Anytime that field is changed run this script and commit the changes.
Since Neutron is a thick container, the script will get a few duplicates
in the neutron-agents field.  When Neutron is thinned out, this script
will function normally.

Closes-bug: #1459347

Co-Authored-By: Lon Hohberger <lhh@redhat.com>
Change-Id: I1ba6bd5148af12cacfd872591b3c7b84a8dccba2

docs/minimal-environment-vars.md

@@ -2,265 +2,489 @@
 
 In order for each service to function, there is a minimum set of required variables that need to be plugged into the environment.  Below is the list of variables that is needed for each service to run in a minimal setting.
 
-# Logging
+# Barbican
 
-    DEBUG_LOGGING
-    VERBOSE_LOGGING
-    NOVA_LOG_DIR
-    NEUTRON_LOG_DIR
-    NOVA_API_LOG_FILE
-    NOVA_CONDUCTOR_LOG_FILE
-    NOVA_SCHEDULER_LOG_FILE
-    NOVA_COMPUTE_LOG_FILE
-    NEUTRON_SERVER_LOG_FILE
-    NEUTRON_L3_AGENT_LOG_FILE
-    NEUTRON_LINUXBRIDGE_AGENT_LOG_FILE
-    NEUTRON_METADATA_AGENT_LOG_FILE
-
-# Mariadb
-
-    MARIADB_SERVICE_HOST
-    MYSQL_ROOT_PASSWORD
-
-# Keystone
-
-    MYSQL_ROOT_PASSWORD
-    GLANCE_KEYSTONE_PASSWORD
-    GLANCE_KEYSTONE_USER
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
     KEYSTONE_ADMIN_TOKEN
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
     KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
-
-# Glance-api
-
-    MYSQL_ROOT_PASSWORD
-    GLANCE_KEYSTONE_PASSWORD
-    GLANCE_KEYSTONE_USER
-    GLANCE_DB_USER
-    GLANCE_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
     KEYSTONE_ADMIN_SERVICE_PORT
-    KEYSTONE_ADMIN_TOKEN
+    BARBICAN_ADMIN_PASSWORD
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
-    GLANCE_REGISTRY_SERVICE_HOST
-    GLANCE_API_SERVICE_HOST
-    PUBLIC_IP
 
-# Glance-registry
+# Ceilometer-alarm
-
-    MYSQL_ROOT_PASSWORD
-    GLANCE_KEYSTONE_PASSWORD
-    GLANCE_KEYSTONE_USER
-    GLANCE_DB_USER
-    GLANCE_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
-    KEYSTONE_ADMIN_TOKEN
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
-    GLANCE_REGISTRY_SERVICE_HOST
-    GLANCE_API_SERVICE_HOST
-    PUBLIC_IP
-
-# Nova-conductor
-
-    MYSQL_ROOT_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    NOVA_DB_USER
-    NOVA_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
-    KEYSTONE_ADMIN_TOKEN
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    MYSQL_ROOT_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    NOVA_DB_USER
-    NOVA_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
-    KEYSTONE_ADMIN_TOKEN
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    PUBLIC_INTERFACE
-    FLAT_INTERFACE
-    KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
-    RABBITMQ_SERVICE_HOST
-    GLANCE_API_SERVICE_HOST
-    NOVA_CONDUCTOR_SERVICE_HOST
-    NOVA_EC2_API_SERVICE_HOST
-    NOVA_EC2_SERVICE_HOST
-    PUBLIC_IP
-
-# Nova-api
-
-    MYSQL_ROOT_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    NOVA_DB_USER
-    NOVA_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
-    KEYSTONE_ADMIN_TOKEN
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    PUBLIC_INTERFACE
-    FLAT_INTERFACE
-    KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
-    RABBITMQ_SERVICE_HOST
-    GLANCE_API_SERVICE_HOST
-    NOVA_API_SERVICE_HOST
-    NOVA_EC2_API_SERVICE_HOST
-    NOVA_EC2_SERVICE_HOST
-    NOVA_METADATA_API_SERVICE_HOST
-    PUBLIC_IP
-
-# Nova-compute
-
-    MYSQL_ROOT_PASSWORD
-    NOVA_KEYSTONE_PASSWORD
-    NOVA_KEYSTONE_USER
-    NOVA_DB_USER
-    NOVA_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
-    KEYSTONE_ADMIN_TOKEN
-    KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    PUBLIC_INTERFACE
-    FLAT_INTERFACE
-    KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
-    RABBITMQ_SERVICE_HOST
-    GLANCE_API_SERVICE_HOST
-    NOVA_COMPUTE_SERVICE_HOST
-    NOVA_EC2_COMPUTE_SERVICE_HOST
-    NOVA_EC2_SERVICE_HOST
-    NOVA_NOVNC_BASE_ADDRESS
-    NOVA_NOVNC_PROXY_PORT
-    PUBLIC_IP
-
-# Nova-libvirt
 
     None
 
-# Nova-scheduler
+# Ceilometer-api
 
-    MYSQL_ROOT_PASSWORD
+    CEILOMETER_DB_USER
-    NOVA_KEYSTONE_PASSWORD
+    CEILOMETER_DB_NAME
-    NOVA_KEYSTONE_USER
+    CEILOMETER_DB_PASSWORD
-    NOVA_DB_USER
-    NOVA_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
-    KEYSTONE_ADMIN_SERVICE_PORT
     KEYSTONE_ADMIN_TOKEN
     KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    PUBLIC_INTERFACE
-    FLAT_INTERFACE
     KEYSTONE_ADMIN_SERVICE_HOST
-    KEYSTONE_PUBLIC_SERVICE_HOST
+    KEYSTONE_ADMIN_SERVICE_PORT
-    MARIADB_SERVICE_HOST
+    ADMIN_TENANT_NAME
-    RABBITMQ_SERVICE_HOST
+    CEILOMETER_KEYSTONE_USER
-    GLANCE_API_SERVICE_HOST
+    CEILOMETER_ADMIN_PASSWORD
-    NOVA_SCHEDULER_SERVICE_HOST
+    CEILOMETER_API_SERVICE_HOST
-    NOVA_EC2_SCHEDULER_SERVICE_HOST
-    NOVA_EC2_SERVICE_HOST
     PUBLIC_IP
 
-# Nova-network
+# Ceilometer-base
 
-    MYSQL_ROOT_PASSWORD
+    KEYSTONE_ADMIN_TOKEN
-    NOVA_KEYSTONE_PASSWORD
+    KEYSTONE_ADMIN_SERVICE_HOST
-    NOVA_KEYSTONE_USER
-    NOVA_DB_USER
-    NOVA_DB_NAME
-    KEYSTONE_ADMIN_PASSWORD
     KEYSTONE_ADMIN_SERVICE_PORT
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    dump_vars
+
+# Ceilometer-central
+
     KEYSTONE_ADMIN_TOKEN
     KEYSTONE_AUTH_PROTOCOL
-    KEYSTONE_DB_PASSWORD
-    ADMIN_TENANT_NAME
-    DB_ROOT_PASSWORD
-    PUBLIC_INTERFACE
-    FLAT_INTERFACE
     KEYSTONE_ADMIN_SERVICE_HOST
+    KEYSTONE_ADMIN_SERVICE_PORT
+
+# Ceilometer-collector
+
+    None
+
+# Ceilometer-compute
+
+    KEYSTONE_ADMIN_TOKEN
+    RABBITMQ_SERVICE_HOST
+    RABBIT_PASSWORD
+
+# Ceilometer-notification
+
+    None
+
+# Cinder-api
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    ADMIN_TENANT_NAME
+    PUBLIC_IP
+    CINDER_API_SERVICE_HOST
+    KEYSTONE_AUTH_PROTOCOL
+    KEYSTONE_ADMIN_SERVICE_PORT
+    CINDER_KEYSTONE_USER
+    CINDER_KEYSTONE_PASSWORD
+    CINDER_API_LOG_FILE
+    CINDER_API_SERVICE_LISTEN
+    CINDER_API_SERVICE_PORT
+    CINDER_API_SERVICE_LISTEN
+
+# Cinder-backup
+
+    CINDER_BACKUP_DRIVER
+    CINDER_BACKUP_MANAGER
+    CINDER_BACKUP_API_CLASS
+    CINDER_BACKUP_NAME_TEMPLATE
+
+# Cinder-base
+
+    CINDER_DB_PASSWORD
+    CINDER_KEYSTONE_PASSWORD
     KEYSTONE_PUBLIC_SERVICE_HOST
-    MARIADB_SERVICE_HOST
     RABBITMQ_SERVICE_HOST
     GLANCE_API_SERVICE_HOST
-    NOVA_NETWORK_SERVICE_HOST
+    MARIADB_SERVICE_HOST
-    NOVA_EC2_NETWORK_SERVICE_HOST
+    RABBITMQ_SERVICE_HOST
-    NOVA_EC2_SERVICE_HOST
+    RABBITMQ_SERVICE_PORT
+    RABBIT_USERID
+    RABBIT_PASSWORD
+    GLANCE_API_SERVICE_HOST
+    GLANCE_API_SERVICE_PORT
+    ADMIN_TENANT_NAME
+    CINDER_DB_NAME
+    CINDER_DB_USER
+    CINDER_KEYSTONE_USER
+    PUBLIC_IP
+    KEYSTONE_AUTH_PROTOCOL
+    CINDER_LOG_DIR
+
+# Cinder-scheduler
+
+    MARIADB_SERVICE_HOST
+    DB_ROOT_PASSWORD
+    CINDER_DB_NAME
+    CINDER_DB_USER
+    CINDER_DB_PASSWORD
+    CINDER_SCHEDULER_LOG_FILE
+    INIT_CINDER_DB
+
+# Cinder-volume
+
+    CINDER_VOLUME_API_LISTEN
+    ISCSI_HELPER
+    ISCSI_IP_ADDRESS
+    CINDER_VOLUME_GROUP
+    CINDER_LVM_LO_VOLUME_SIZE
+    CINDER_VOLUME_BACKEND_NAME
+    CINDER_VOLUME_DRIVER
+    CINDER_ENABLED_BACKEND
+    CINDER_VOLUME_LOG_FILE
+    CINDER_LVM_LO_VOLUME_SIZE
+    CINDER_VOLUME_GROUP
+
+# Designate-api
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    DESIGNATE_KEYSTONE_USER
+    DESIGNATE_KEYSTONE_PASSWORD
+    KEYSTONE_AUTH_PROTOCOL
+    ADMIN_TENANT_NAME
+    DESIGNATE_API_SERVICE_HOST
+    DESIGNATE_API_SERVICE_PORT
+    KEYSTONE_ADMIN_SERVICE_PORT
+
+# Designate-backend-bind9
+
+    DESIGNATE_MASTERNS
+    DESIGNATE_SLAVENS
+    DESIGNATE_BIND9_RNDC_KEY
+    DESIGNATE_ALLOW_RECURSION
+
+# Designate-base
+
+    DESIGNATE_DB_PASSWORD
+    DESIGNATE_KEYSTONE_PASSWORD
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    RABBITMQ_SERVICE_HOST
+    DESIGNATE_BIND9_RNDC_KEY
+    DESIGNATE_BACKEND
+    KEYSTONE_PUBLIC_SERVICE_PORT
+    DESIGNATE_KEYSTONE_USER
+    RABBIT_USERID
+    RABBIT_PASSWORD
+    DESIGNATE_DB_USER
+    DESIGNATE_DB_NAME
+    KEYSTONE_AUTH_PROTOCOL
+    KEYSTONE_ADMIN_SERVICE_HOST
+    KEYSTONE_ADMIN_SERVICE_PORT
+    DEBUG_LOGGING
+    DESIGNATE_POOLMAN_POOLID
+
+# Designate-central
+
+    MARIADB_SERVICE_HOST
+    DB_ROOT_PASSWORD
+    DESIGNATE_DB_NAME
+    DESIGNATE_DB_USER
+    DESIGNATE_DB_PASSWORD
+    INIT_DESIGNATE_DB
+
+# Designate-mdns
+
+    DESIGNATE_MASTERNS
+    DESIGNATE_MDNS_PORT
+
+# Designate-poolmanager
+
+    DESIGNATE_MASTERNS
+    DESIGNATE_BACKEND
+    DESIGNATE_SLAVENS
+    DESIGNATE_MDNS_PORT
+    DESIGNATE_DNS_PORT
+    DESIGNATE_POOLMAN_POOLID
+    DESIGNATE_POOLMAN_TARGETS
+    DESIGNATE_POOLMAN_NSS
+    DESIGNATE_POOLMAN_POOLID
+
+# Designate-sink
+
+    DESIGNATE_API_SERVICE_HOST
+    DESIGNATE_API_SERVICE_PORT
+    DESIGNATE_DEFAULT_POOL_NS_RECORD
+
+# Galera
+
+    DB_CLUSTER_BIND_ADDRESS
+    DB_CLUSTER_NAME
+    DB_CLUSTER_NODES
+    DB_ROOT_PASSWORD
+    DB_CLUSTER_WSREP_METHOD
+    DB_CLUSTER_INIT_DB
+
+# Glance-api
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    GLANCE_KEYSTONE_USER
+    GLANCE_KEYSTONE_PASSWORD
+    ADMIN_TENANT_NAME
+    GLANCE_API_SERVICE_HOST
     PUBLIC_IP
 
-# Nova NoVNC
+# Glance-base
 
-    NOVA_VNCSERVER_LISTEN_ADDRESS
+    GLANCE_DB_PASSWORD
-    NOVA_VNCSERVER_PROXYCLIENT_ADDRESS
+    GLANCE_KEYSTONE_PASSWORD
 
-# Neutron/Nova
+# Glance-registry
 
+    GLANCE_DB_NAME
+    GLANCE_DB_USER
+    GLANCE_DB_PASSWORD
+    INIT_GLANCE_DB
+
+# Hautoproxy
+
+    None
+
+# Heat-api-cfn
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    HEAT_CFN_KEYSTONE_USER
+    HEAT_CFN_KEYSTONE_PASSWORD
+    KEYSTONE_AUTH_PROTOCOL
+    KEYSTONE_ADMIN_SERVICE_PORT
+    ADMIN_TENANT_NAME
+    HEAT_API_CFN_SERVICE_HOST
+    HEAT_API_CFN_SERVICE_PORT
+
+# Heat-api
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    HEAT_KEYSTONE_USER
+    HEAT_KEYSTONE_PASSWORD
+    KEYSTONE_AUTH_PROTOCOL
+    ADMIN_TENANT_NAME
+    HEAT_API_SERVICE_HOST
+    PUBLIC_IP
+
+# Heat-base
+
+    HEAT_DB_PASSWORD
+    HEAT_KEYSTONE_PASSWORD
+    HEAT_API_CFN_URL_HOST
+    HEAT_API_CFN_SERVICE_PORT
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    KEYSTONE_PUBLIC_SERVICE_PORT
+    RABBITMQ_SERVICE_HOST
+    MARIADB_SERVICE_HOST
+
+# Heat-engine
+
+    HEAT_DB_NAME
+    HEAT_DB_USER
+    HEAT_DB_PASSWORD
+    INIT_HEAT_DB
+
+# Horizon
+
+    None
+
+# Keepalived
+
+    KEEPALIVED_HOST_PRIORITIES
+    PUBLIC_IP
+    PUBLIC_INTERFACE
+
+# Keystone
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_DB_PASSWORD
+    KEYSTONE_ADMIN_PASSWORD
+    ADMIN_TENANT_NAME
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    KEYSTONE_ADMIN_SERVICE_HOST
+    PUBLIC_IP
+    INIT_KEYSTONE_DB
+
+# Magnum-api
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    MAGNUM_KEYSTONE_USER
+    MAGNUM_KEYSTONE_PASSWORD
+    KEYSTONE_AUTH_PROTOCOL
+    ADMIN_TENANT_NAME
+    MAGNUM_API_SERVICE_HOST
+    KEYSTONE_ADMIN_SERVICE_PORT
+    MAGNUM_API_SERVICE_PORT
+
+# Magnum-base
+
+    MAGNUM_DB_PASSWORD
+    MAGNUM_KEYSTONE_PASSWORD
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    KEYSTONE_PUBLIC_SERVICE_PORT
+    MAGNUM_KEYSTONE_USER
+    ADMIN_TENANT_NAME
+    MAGNUM_DB_USER
+    MAGNUM_DB_NAME
+    KEYSTONE_AUTH_PROTOCOL
+    KEYSTONE_PUBLIC_SERVICE_PORT
+    RABBITMQ_SERVICE_HOST
+    VERBOSE_LOGGING
+    DEBUG_LOGGING
+
+# Magnum-conductor
+
+    MAGNUM_DB_NAME
+    MAGNUM_DB_USER
+    MAGNUM_DB_PASSWORD
+
+# Mariadb
+
+    None
+
+# Mongodb
+
+    None
+
+# Neutron-agents
+
+    VERBOSE_LOGGING
+    DEBUG_LOGGING
+    MECHANISM_DRIVERS
+    DHCP_DRIVER
+    USE_NAMESPACES
+    DELETE_NAMESPACES
+    NEUTRON_LOG_DIR
+    DNSMASQ_CONFIG_FILE
+    PUBLIC_IP
+    NEUTRON_FLAT_NETWORK_NAME
+    NEUTRON_FLAT_NETWORK_INTERFACE
+    KEYSTONE_AUTH_PROTOCOL
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    ADMIN_TENANT_NAME
+    NEUTRON_KEYSTONE_USER
+    NEUTRON_KEYSTONE_PASSWORD
     NEUTRON_SHARED_SECRET
+    NOVA_METADATA_API_SERVICE_HOST
+    NOVA_METADATA_API_SERVICE_PORT
 
-# Neutron Server
+# Neutron-base
 
+    NEUTRON_KEYSTONE_PASSWORD
+    NEUTRON_API_PASTE_CONFIG
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    RABBITMQ_SERVICE_HOST
+
+# Neutron-server
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    KEYSTONE_AUTH_PROTOCOL
+    NOVA_API_SERVICE_HOST
+    NOVA_KEYSTONE_USER
+    NOVA_KEYSTONE_PASSWORD
     NEUTRON_DB_NAME
     NEUTRON_DB_USER
     NEUTRON_DB_PASSWORD
     NEUTRON_KEYSTONE_USER
     NEUTRON_KEYSTONE_PASSWORD
+    ADMIN_TENANT_NAME
     NEUTRON_SERVER_SERVICE_HOST
-    NEUTRON_API_PASTE_CONFIG
+    PUBLIC_IP
+    NEUTRON_DB_PASSWORD
 
-# Neutron ML2 PLugin
+# Nova-base
 
-    TYPE_DRIVERS
+    KEYSTONE_ADMIN_TOKEN
-    TENANT_NETWORK_TYPES
+    NOVA_DB_PASSWORD
-    MECHANISM_DRIVERS
+    RABBITMQ_SERVICE_HOST
+    GLANCE_API_SERVICE_HOST
+    KEYSTONE_PUBLIC_SERVICE_HOST
+    PUBLIC_IP
+    PUBLIC_INTERFACE
+    FLAT_INTERFACE
+    DEBUG_LOGGING
+    VERBOSE_LOGGING
+    NEUTRON_SHARED_SECRET
 
-# Neutron Linux Bridge Plugin
+# Nova-compute
 
-    NEUTRON_FLAT_NETWORK_NAME
+    NOVA_VNCSERVER_PROXYCLIENT_ADDRESS
-    NEUTRON_FLAT_NETWORK_INTERFACE
+    NOVA_NOVNC_PROXY_PORT
+    NOVA_NOVNC_BASE_ADDRESS
+
+# Nova-libvirt
+
+    None
+
+# Nova-network
+
+    None
+
+# Nova-api
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    NOVA_KEYSTONE_USER
+    NOVA_KEYSTONE_PASSWORD
+    ADMIN_TENANT_NAME
+    NOVA_API_SERVICE_HOST
+    NOVA_EC2_API_SERVICE_HOST
+    PUBLIC_IP
+    NOVA_DB_NAME
+
+# Nova-conductor
+
+    NOVA_DB_NAME
+    NOVA_DB_USER
+    NOVA_DB_PASSWORD
+    INIT_NOVA_DB
+
+# Nova-consoleauth
+
+    None
+
+# Nova-novncproxy
+
+    PUBLIC_IP
+    NOVA_NOVNC_PROXY_SERVICE_HOST
+    NOVA_NOVNC_PROXY_PORT
+    NOVA_NOVNC_BASE_ADDRESS
+    NOVA_VNCSERVER_LISTEN_ADDRESS
+    NOVA_VNCSERVER_PROXYCLIENT_ADDRESS
+
+# Nova-scheduler
+
+    NOVA_DB_NAME
+
+# Rabbitmq
+
+    RABBITMQ_CLUSTER_COOKIE
+    RABBITMQ_CLUSTER_NODES
+    RABBITMQ_LOG_BASE
+    RABBITMQ_PASS
+    RABBITMQ_USER
+
+# Swift-account
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    SWIFT_ADMIN_PASSWORD
+
+# Swift-base
+
+    None
+
+# Swift-container
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    SWIFT_ADMIN_PASSWORD
+
+# Swift-object
+
+    KEYSTONE_ADMIN_TOKEN
+    KEYSTONE_ADMIN_SERVICE_HOST
+    SWIFT_ADMIN_PASSWORD
+
+# Swift-proxy-server
+
+    None
+
+# Zaqar
+
+    ZAQAR_KEYSTONE_PASSWORD
+    ZAQAR_SERVER_SERVICE_HOST
+    KEYSTONE_ADMIN_SERVICE_HOST
+    KEYSTONE_ADMIN_TOKEN
+    PUBLIC_IP

tools/min-env.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+#
+# This script generates the minimal environment variable doc
+
+# Move to top level directory
+REAL_PATH=$(python -c "import os,sys;print os.path.realpath('$0')")
+cd "$(dirname "$REAL_PATH")/.."
+
+DOC=docs/minimal-environment-vars.md
+DOCKERDIR="docker"
+# BASE and TYPE can be hard coded to centos and rdo since the required vars will always be the same
+BASE="centos"
+TYPE="rdo"
+
+function write_header {
+    local header=$1
+    header=${header^}
+    header=$(echo ${header} | sed -e 's/-app//')
+    echo -e "\n# $header\n" >> "$DOC"
+}
+
+function write_env_var {
+    local env_var=$1
+    if [ -z "$env_var" ]; then
+        echo "" >> "$DOC"
+    else
+        env_var=${env_var%=*}
+        echo "    $env_var" >> "$DOC"
+    fi
+}
+
+function find_vars {
+    local img_location=$1
+    local empty=true
+    scripts=$(find ${img_location} -name *.sh | sort -t / -k 4)
+
+    for script in $scripts; do
+        local vars=$(awk '/^\s*check_required_vars/,/([^\\]\s*$)/' $script)
+        vars=$(echo "$vars" | sed 's/check_required_vars//' | sed 's/\\//g')
+
+        if [ ! -z "$vars" ]; then
+            empty=false
+            for v in $vars; do
+                write_env_var $v
+            done
+        fi
+    done
+
+    if $empty; then
+        echo "    None" >> "$DOC"
+    fi
+}
+
+cat > $DOC <<EOF
+# Environment Variables
+
+In order for each service to function, there is a minimum set of required variables that need to be plugged into the environment.  Below is the list of variables that is needed for each service to run in a minimal setting.
+EOF
+
+declare -a startsh
+startsh=$(find "${DOCKERDIR}/${BASE}/${TYPE}/" -name Dockerfile | sort -t / -k 4 | grep -v data)
+
+for start_script in $startsh; do
+    if [ ! "$(dirname $start_script | xargs basename)" == "base" ]; then
+        write_header $(dirname $start_script | xargs basename)
+        find_vars $(dirname $start_script) $(dirname $start_script | xargs basename)
+    fi
+done