Kiuwan on premises On-Premises (KoP) is based on a client-server architecture that includes these major server components:

• Apache web server
• Wildfly application server
• MySQL database
• Redis in-memory data store

Kiuwan on premises On-Premises can be installed on a single host or on multiple hosts (externalizing one, some or all of the provided infrastructure services).

You can also install Kiuwan on premises On-Premises under your own AWS cloud, replacing the provided infrastructure services with compatible AWS services.

Kiuwan On-Premises and its roles

Kiuwan on On-Premises defines three different roles for each Kiuwan service instance:

• Kiuwan front: receives and answers HTTPS, HTTP or AJP requests (depending on your configuration) from the Apache web server (or directly from a client, depending on your configuration), both for the web application and REST API calls.
• Kiuwan analyzer: processes analysis results asynchronously.
• Kiuwan scheduler: processes background tasks such as notifications or live database upgradesand Kiuwan Insights database updates.

The default installation will create a Kiuwan service instance of each role.

Supplied services

All needed services are supplied as Docker containers. The following table summarizes all the available services:

The following diagram shows the infrastructure that KoP installer will create by default:how Kiuwan On-Premises would be set out by default (that is, a single host default installation):

Image Added Image Removed

The main purpose of each piece is (service names are shown between parentheses):

• Apache (loadbalancerapacheloadbalancer): an Apache instance that balances the traffic between Kiuwan frontals (kept in the default installation to allow easy frontal scaling).
• Kiuwan front (wildflywildflykiuwan-f1): a Kiuwan frontalrecieves and processes HTTPS requests.
• Kiuwan analyzer (wildflywildflykiuwan-a1): a Kiuwan analyzerprocesses analyses.
• Kiuwan scheduler (wildflywildflykiuwan-s1): a Kiuwan schedulerexecutes background tasks.
• MySQL (mysqlmysqlkiuwan): the main stores Kiuwan databasedata.
• Redis cluster (redis_0000[n]): redis store nodes. Used used by Kiuwan as a data cache.
• Redis cluster creator (clustercreator): a temporal redis container that configures each Redis node as a cluster.
• Kiuwan updater (updaterupdaterkiuwan): a temporal Kiuwan instance that installs, updates and upgrades needed data or configuration.

Note that connection with Kiuwan Cloud is only needed in some situations (see Needed internet connections).

Clustering support

Depending on your needs, the Kiuwan on premise On-Premises architecture supports both clustered environments and single-host installations. You can:

• Keep all services in an all-in-one host installation.
• Decide where each service will be installed, one by one (both Kiuwan services and infrastructure).
• Externalize one, some or all of the provided non-kiuwan Kiuwan services:
  • Apache load balancer
  • MySQL
  • Redis

All kiuwan Kiuwan instance containers can be scaled up (to a limit) or down to the default configuration. This means that you can start more containers of each Kiuwan role depending on your load needs.

To illustrate the flexibility that Kiuwan On-Premises installation tool provides, an alternative and possible configuration is depicted in the following image (Kiuwan Cloud and temporal services were ommitted in order to simplify the diagram):

Image Added

As the picture shows, you can distribute Kiuwan On-Premises services across different hosts and use external services to replace some of the ones provided.