This page provides considerations for reviewing when preparing a production deployment. Because no two deployments are the same, this page is more of a starting point than a final list, but it can be useful in terms of helping to remember important considerations.
When deploying to a server (e.g. a virtual machine running RHEL or Ubuntu) the following considerations apply:
The ulimit setting is used in Linux to limit the number of processes, open files, and other resources that an individual user can have open. On some Linux variants (RHEL in particular) this value can be set to a low default in order to prevent individual processes from consuming too many resources.
The normal operation of a high-throughput Smile CDR installation can open large numbers of files, so it is recommended to ensure that the Maximum Number of Open File Descriptors value (known as
nofile in limit.conf) is set appropriately. A value of 5000 is recommended.
See this page for information on configuring limit.conf.
The Smile CDR System Logging can be useful to understanding what is happening with Smile CDR at runtime. Consider adjusting the following:
Retention: By default the primary log files will keep a maximum of 30 days worth of logs, but this can be adjusted using the Logback settings. Ensure that the chosen settings are appropriate for your organizational policies.
Location: You may wish to dedicate separate disk partitions for logging, or centralize your log files in
/var/log. The location of log files defaults to
[base dir]/log but this can be changed in your Logback settings.
The Smile CDR Cluster Manager and FHIR Storage databases use the embedded H2 database by default, as this is a nice option for testing purposes. However, this solution is not recommended for production use, and should be replaced with a supported database.
The Smile CDR Transaction Log is a useful tool for troubleshooting, but keeping a detailed log of every transaction has an impact on system throughput.
Consider reducing retention time, disabling request/response body capture, or even disabling the transaction log entirely on production systems.
The Smile CDR Audit Log keeps a record of accesses and modifications to data and system settings.
Consider disabling the audit log if it is providing functionality that is duplicated in other parts of your overall solution.
The use of a third-part monitoring tool or framework is recommended. Smile CDR provides many useful hooks that can interact with these tools. One commonly used option is Nagios but there are many others as well.
Configuring your monitoring tool to regularly check the Endpoint Health endpoint ensures that you will be notified if an endpoint is down.
Configuring your monitoring tool to regularly check the Runtime Status Health Checks endpoint for module health is a good way to ensure that the system is functioning smoothly. See Runtime Health Checks for information on this feature.
If it is not already configured, it is important to ensure that alerts will be raised if a disk becomes critically full.
The HTTP Server Setup page outlines a number of configuration options on HTTP Endpoint modules that should be set appropriately for your specific environment. Please review this page and ensure that you are using sensible settings.
The default installation of Smile CDR uses an embedded instance of Apache ActiveMQ. This is good for testing and low volume setting but should be replaced with something more robust for high volume setups.
Either a standalone ActiveMQ instance or a standalone Kafka instance should be created and configured. See Message Brokers for more information.
If you are using standalone Apache ActiveMQ as your message broker, it is important to configure the Broker Resource Limits appropriately.