MultiRegionDeployments

MULTI REGION DEPLOYMENTS

If you want to deploy using multiple regions you will need to set

MULTI_REGION="1"

in your template(s) for each region.

You will also need to set a primary region by having one of the regions you are deploying to set

PRIMARY_REGION="1"

and all the additional regions set

PRIMARY_REGION="0"

When making a multi region deployment you will need to provide the public DBaaS endpoint to all regions which are not the primary region. The primary region should be set such that the region for your webservers of your primary region is the same region/VPC/provider as the DBaaS database you are deploying.

Every region will need to provision its own reverse proxy machines because multi-region deployments are only possible when each individual region uses reverse proxies to forward traffic to the fleet of webservers for that region.

Here I have used one build machine running in the gb-lon to perform the builds for all regions of the multi region deployment but you could have a different build machine in/for each region and that would encapsulate each region nicely and make it simpler to have different teams responsible for primary, and secondary and even tertiary regions.

EXAMPLE 1 (PRIMARY REGION Linode running gb-lon)

Shown below are my template configurations if I want to deploy a primary region of gb-lon and a secondary region of nl-ams for my application on the linode platform.You need to take a similar approach with other providers if you want to deploy to multiple regions.

For this example, you first need to deploy a build machine in the gb-lon region which you can do by following this

TEMPLATE FOR THE PRIMARY REGION (gb-lon)

When you make a multi region deployment the advice is that you should set the BUILD_IDENTIFER to include the region that is being deployed to, for example, testdeploy-gb-lon for the gb-lon domain and testdeploy-nl-ams for the nl-ams domain under linode. I have one build machine in the gb-lon region.

Highlighted in red are the settings in the templates that you need to take particular care with when making a multi-region deployment

###############################################################################################
# Refer to: ${BUILD_HOME}/templatedconfigurations/specification.md ###############################################################################################
#This template is configured for temporal style builds

#####MANDATORY - the bare minimum set of values that you need to provide to have any chance of a successful build
#####NOT REQUIRED - isn't used by the Linode system

#####Application Settings#########
export APPLICATION="joomla" #MANDATORY
export JOOMLA_VERSION=""
export DRUPAL_VERSION=""
export APPLICATION_BASELINE_SOURCECODE_REPOSITORY=""
export BASELINE_DB_REPOSITORY=""
export APPLICATION_LANGUAGE="PHP"
export PHP_VERSION="8.4"
export BUILD_ARCHIVE_CHOICE="hourly"
export APPLICATION_NAME="Demo Application"

#####S3 Datastore Settings#######
export S3_ACCESS_KEY="JH56HJ78WE4T6U8OO90"
export S3_SECRET_KEY="Hgdj89K2w3eyrb1289sfjDewjk"
export S3_HOST_BASE="nl-ams-1.linodeobjects.com"
export S3_LOCATION="US" #For linode, this always needs to be set to "US"
export DIRECTORIES_TO_MOUNT="images" #This should always be unset for a virgin and baseline deployments
export PERSIST_ASSETS_TO_DATASTORE="1" #This should always be set to 0 for a virgin and baseline deployment

#####OS Settings#########
export BUILDOS="debian" # One of ubuntu|debian
export BUILDOS_VERSION="12" # 24.04 (or later for BUILDOS="ubuntu") | 12 (or later for BUILDOS="debian")

######Cloudhost Provider Settings#######
export TOKEN="hjdd738jdaq7fhwk2bdif8rhdnqi238fks92jdkfojshf93jsfhndjk67" #MANDATORY
export ACCESS_KEY="" #NOT REQUIRED
export SECRET_KEY="" #NOT REQUIRED
export CLOUDHOST_ACCOUNT_ID="demoaccount" #MANDATORY for Linode - this should be the account username that you login with

######DNS Settings##########
export DNS_USERNAME="dnsusername@email.com" #MANDATORY
export DNS_SECURITY_KEY="9aa34568735212367d137dfadf34daa26:H3aYfKLqW4gfJQP1qOPc_jkWPa-QjiodJAL0jCKM" #MANDATORY (note you need a API token and account ID here if you use cloudflare)
export DNS_CHOICE="cloudflare" #you will need to set your DNS nameservers according to this choice

#####Webserver Settings########
export WEBSITE_DISPLAY_NAME="Joomla Demo" #MANDATORY
export WEBSITE_NAME="codetesters" #MANDATORY
export WEBSITE_URL="www.codetesters.uk" #MANDATORY
export WEBSERVER_CHOICE="APACHE"
export REVERSE_PROXY_WEBSERVER="APACHE"
export NO_WEBSERVERS="1"
export MAX_WEBSERVERS="10"
export MOD_SECURITY="0"

#####Git settings#####
export GIT_USER="Templated User" #MANDATORY
export GIT_EMAIL_ADDRESS="templateduser@dummyemailZ123.com" #MANDATORY

#####Infrastructure Repository Settings#######
export INFRASTRUCTURE_REPOSITORY_PROVIDER="github"
export INFRASTRUCTURE_REPOSITORY_OWNER="wintersys-projects"
export INFRASTRUCTURE_REPOSITORY_USERNAME="wintersys-projects"

###### Application Repository Settings########
export APPLICATION_REPOSITORY_PROVIDER="github"
export APPLICATION_REPOSITORY_OWNER="adt-apps" #MANDATORY
export APPLICATION_REPOSITORY_USERNAME="adt-apps" #MANDATORY
export APPLICATION_REPOSITORY_TOKEN="github_pat_11BELT3NQ03fCHpjdjn7y3hjdhkf37DHHS8jfh38fjfy3o9qoskfogjJHHJDJkfhskfu3osdjf"

##### System Email Settings#########
export SYSTEM_EMAIL_PROVIDER=""
export SYSTEM_EMAIL_PROVIDER="2"
export SYSTEM_TOEMAIL_ADDRESS="webmaster@codetesters.uk"
export SYSTEM_FROMEMAIL_ADDRESS="webmaster@codetesters.uk"
export SYSTEM_EMAIL_USERNAME="gf72fdhkocnv28de7e8ifjjw8f2"
export SYSTEM_EMAIL_PASSWORD="hfjh47fi328rjfh28folmajfigj"
export EMAIL_NOTIFICATION_LEVEL="ERROR"

##### Database Settings######
export DB_PORT="2035"
export DATABASE_INSTALLATION_TYPE="DBaaS"
export DATABASE_DBaaS_INSTALLATION_TYPE="MySQL:DBAAS:mysql/8:gb-lon:g6-nanode-1:1:test-cluster:testdb:testdbuser:hfhuf83jfhfu73jd:436653:234531"
export BYPASS_DB_LAYER="0"

#####Server Settings #######
export REGION="gb-lon"
export DB_SERVER_TYPE="g6-nanode-1"
export WS_SERVER_TYPE="g6-nanode-1"
export AS_SERVER_TYPE="g6-nanode-1"
export AUTH_SERVER_TYPE="g6-nanode-1"
export RP_SERVER_TYPE="g6-nanode-1"
export MACHINE_TYPE="LINODE"
export SSH_PORT="1035"
export SERVER_TIMEZONE_CONTINENT="Europe"
export SERVER_TIMEZONE_CITY="London"
export USER="root"
export SYNC_WEBROOTS="0"
export USER_EMAIL_DOMAIN=""

#####Build Settings###### export PRODUCTION="1"
export DEVELOPMENT="0"
export NO_AUTOSCALERS="1"
export NO_REVERSE_PROXY="1"
export AUTHENTICATION_SERVER="0"
export BUILD_FROM_SNAPSHOT="0"

#####Security Settings#####
export ACTIVE_FIREWALLS="3"
export PUBLIC_KEY_NAME="AGILE_TOOLKIT_PUBLIC_KEY"
export SSL_GENERATION_METHOD="AUTOMATIC"
export SSL_GENERATION_SERVICE="LETSENCRYPT"
export SSL_LIVE_CERT="1"
export ALGORITHM="ed25519"
export BUILD_MACHINE_VPC="1"
export VPC_IP_RANGE="10.0.1.0/24"
export VPC_NAME="adt-vpc-gb-lon"

#####Multi Region Deployments#####
export MULTI_REGION="1"
export PRIMARY_REGION="1"
export DBaaS_PUBLIC_ENDPOINT=""

#####Build Style#######
export INPARALLEL="1"

export BUILD_IDENTIFIER="test-gb-lon"
export CLOUDHOST="linode"

Here is my template for the nl-ams region when I am deploying to a primary region of gb-lon using the template above and to a secondary region to nl-ams using the template below both (in this case) under Linode

###############################################################################################
# Refer to: ${BUILD_HOME}/templatedconfigurations/specification.md
###############################################################################################
#This template is configured for temporal style builds