a9s MySQL

This documentation describes the a9s MySQ. a9s MySQL enables on-demand provisioning of VM-based, dedicated MySQL servers. Developers can create instances of a MySQL server using Apps Manager or the Cloud Foundry Command Line Interface (cf CLI) and bind these instances to an app.

Overview

When you run the cf CLI cf create-service a9s-mysql101 command, PCF creates dedicated VMs for this service instance. This allows the best possible bad neighborhood protection.

MySQL service instance provisioning, including VM orchestration, is entirely automated. This enables service instances to be highly isolated and shielded by infrastructure virtualization mechanisms.

Due to the on-demand provisioning on VMs, only existing service instances allocate infrastructure resources. These resources are released when service instances are destroyed. Using on-demand provisioning the number of service instances is not limited by design.

Current Features

The current version of a9s MySQL includes the following key features:

Feature	Benefit
On­-Demand Service Instance Provisioning	a9s MySQL deploys MySQL instances automatically. Developers can provision a single-VM MySQL server using a single command.
Service Instance Isolation	Each MySQL server runs on a dedicated VM to ensure bad neighborhood protection in order to be aligned with enterprise security requirements. a9s MySQL uses Cloud Foundry security groups to prevent network connections being established by unauthorized apps.
Smoke Tests	a9s MySQL contains a post-deploy smoke tests errand that runs a series of basic tests against your installation to ensure that it is configured properly.
Service Instance Capacity Upgrade	Cloud Foundry Service Plan updates allow upgrades to the RAM, CPU, and storage capacity for your MySQL instances.
Logging and Monitoring	Each MySQL service instance provides log messages and MySQL-specific metrics to one or more syslog/graphite endpoints. You can configure the syslog/graphite endpoint to receive logging and monitoring information.
Deployment Updater	This errand automatically updates the stemcell and all provisioned a9s MySQL service instances to their lastest version.
Service Guard	The Service Guard creates Cloud Foundry security groups for your service instance VMs. When the IP address of a service instance changes, the guard updates the security group.
High Availability	a9s MySQL ensures high availability. The Consul-based internal DNS system provided by a9s Consul DNS ensures that the connected application always connects to a working node.