Helm Chart Limits in a Cloud Native Network Function (CNF) using Telco Cloud Automation (TCA) 2.1.1

Products

• VMware
• VMware Telco Cloud Automation

Issue/Introduction

This document is intended to serve as a guideline for the sizing of Helm deployments to ensure they fall within the prescribed configuration limits documented in the VMware Telco Cloud Automation 2.1.1 Configuration Limits.

Note: The following limits have been tested by VMware and can vary depending on several factors including the combination of the various parameters such as number of charts, their size and other dependencies.

Environment

VMware Telco Cloud Automation 2.1.1

Resolution

Telco Cloud Automation 2.1.1 can support the following Network Function Configurations:

CNF Parameter	Maximum Configuration Value
Maximum number of Helm Charts per CNF CSAR. The maximum number of Helm Charts that can be added per CSAR for any given CNF.   NOTE: It is important to note that this is a soft limit which is dependent on the values of the parameters listed in this table. The overall numbers need to be taken into consideration.   As an example, the following configurations will cause a failure: -A simple CNF with just one Helm Chart containing 26 values.yaml. -A CNF with just 5 Helm Charts with very large values.yaml files for instantiation (larger than 5 MB post base64 encoding).	35*
Maximum number of values yaml files or attachments per CNF LCM operation: The maximum number of files that can be attached as part of any CNF operation (eg: Instantiation, Upgrade, etc.). These are per dependency. i.e. for a given VDU Order, one can have maximum 25 attachments.	25
Maximum size of all values yaml files or attachments for CNF Instantiation: The consolidated size of all values.yaml files and attachments combined and then base64 encoded should not exceed 5 MB. (post base64 encoding)	5 MB
Maximum size of all values yaml files or attachments for CNF Upgrade: The consolidated size of all values.yaml files and attachments combined and then base64 encoded should not exceed 5 MB. (post base64 encoding)	5 MB
Maximum size of all values yaml files or attachments for CNF Reconfigure: The consolidated size of all values.yaml files and attachments combined and then base64 encoded should not exceed 500 KB. (post base64 encoding)	500 KB
Maximum size of all values yaml files or attachments for CNF Scale: The consolidated size of all values.yaml files and attachments combined and then base64 encoded should not exceed 500 KB. (post base64 encoding)	500 KB