Artifactory HA architecture presents a Load Balancer connected to a cluster of two or more Artifactory servers that share a common database where all the Artifactory configuration files are maintained. Binaries may be stored on a Network File System, or using a zoned sharded binary provider as described in Configuring Sharding for High Availability. The Artifactory cluster nodes must be connected through a fast internal LAN in order to support high system performance as well as to stay synchronized and notify each other of actions performed in the system instantaneously. One of the Artifactory cluster nodes is configured to be a "primary" node. Its roles are to execute cluster-wide tasks such as cleaning up unreferenced binaries.
JFrog support team is available to help you configure the Artifactory cluster nodes. It is up to your organization's IT staff to configure your load balancer, database and object store.
The load balancer is the entry point to your Artifactory HA installation and optimally distributes requests to the artifactory server nodes in your system. It is the responsibility of your organization to manage and configure it correctly.
The code samples below show some basic examples of load balancer configurations:
More details are available on the nginx website.
Artifactory Server Cluster
Each Artifactory server in the cluster receives requests routed to it by the load balancer. All servers share a common database, and communicate with each other to ensure that they are synchronized on all transactions.
Local Area Network
To ensure good performance and synchronization of the system, all the components of your Artifactory HA installation must be installed on the same high-speed LAN.
In theory, Artifactory HA could work over a Wide Area Network (WAN), however in practice, network latency makes it impractical to achieve the performance required for high availability systems.
Artifactory HA offers different options for storing binaries. Some examples are:
- Local file system in which binaries are stored with redundancy using a binary provider which manages synchronizing files between the cluster nodes according to the redundancy defined.
- Cloud storage (currently, Amazon S3 and Google Cloud Storage are supported)
- Network File System (NFS)
Artifactory HA requires an external database, which is fundamental to management of binaries and is also used to store cluster wide configuration files. Currently MySQL, Oracle, MS SQL and PostgreSQL are supported. For details on how to configure any of these databases please refer to Configuring the Database.
Since Artifactory HA contains multiple Artifactory cluster nodes, your database must be powerful enough to service all the nodes in the system. Moreover, your database must be able to support the maximum number of connections possible from all the Artifactory cluster nodes in your system.
If you are replicating your database you must ensure that at any given point in time all nodes see a consistent view of the database, regardless of which specific database instance they access. Eventual consistency, and write-behind database synchronization is not supported.
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