Skylight sensor agents 21.12 Release Notes

Updated on 17 Jan 2022
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Overview

Accedian is pleased to announce release 21.12 of Skylight sensor: agents.

What's New

21.12 is the second GA release of the Skylight sensor: agent and contains a number of new features and functions compared to the previous 21.06 release:

New session types for actuate - UDP echo and ICMP echo
Management API changes with new common structure for all agents
Automated handling of throughput baseline test results in orchestration
Performance Data Broker performance improvements
Support for namespaces (VRF)
Disk space size reduction of agent containers by 20-40%
Reflectors in actuate now disabled by default to support multi-agent deployments on same host
Demo agent for path tracing, with API and orchestration

Note: Given that configuration API has changed since the earlier release, all configurations must be recreated.

Release Components

Component	Version	Note
agent throughput	skylight-agent-throughput-amd64_21.12_714
agent actuate	skylight-agent-actuate-amd64_21.12_714
agent trace	skylight-agent-trace-amd64_21.12_714	Demo only
orchestration	0.66.0 (component of Skylight analytics 21.12)
roadrunner	0.295.0

Agent Characteristics and Capabilities

agent	capability	max use count	CPU max	RAM max	Disk typical	comment
actuate	RFC5357 TWAMP light	50	0.15 core	0.3GB	0.2GB	20pps each
actuate	RFC5357 TWAMP control	50	0.15 core	0.3GB	0.2GB	20pps each
actuate	RFC862 UDP Echo	50	0.15 core	0.3GB	0.2GB	20pps each
actuate	RFC792 ICMP Echo	50	0.15 core	0.3GB	0.2GB	20pps each
throughput	RFC6349 baseline	1	1 core	0.1GB	0.2GB	cell
throughput	RFC6349 throughput	1	1 core	0.1GB	0.2GB	10Gbps max
trace	UDP/TCP/ICMP Paris/Dublin	demo only	1 core	0.1GB	0.2GB	1 destination
roadrunner data proxy	-	-	4 cores	8GB	10GB	2,500 concurrent sessions

Upgrade Paths

Skylight sensor: agents use a destroy-redeploy model common for container applications. This means that an agent is never upgraded, it is simply replaced. In order to support this mode of operation, only the absolute minimum of configuration parameters are stored with the agent, the rest being kept in the orchestration system and downloaded to the agent at startup. The agent 21.12 is backwards compatible with the docker-compose configuration of 21.06, which means the agent can be updated by changing the release version in the docker compose file. Note that the session/test configuration has changed which requires redefinition of any active sessions before or after upgrade.

Deployment Considerations

The sensor: agents deploy as containers on x86 environments. Thus, a container environment is required and we recommend docker 20.10.0 or later.

Corrected Issues

ID	description	workaround
SA-412	Session name of 64 characters not supported	Use max 63 unicode characters

Known Issues

ID	description	workaround
SA-327	RFC6349 baseline MTU detection may fail on lossy networks	Define MTU statically in throughput test configuration
SA-306	Payload size for IPv6 TWAMP can be set to larger values than the MTU	Do not use larger IPv6 payload size than 1452b
SA-509	TWAMP-CP: When control session is down, data is not accepted into analytics	Make sure the (3rd party) TWAMP responder is up

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Skylight sensor agent reflect 21.12 Release Notes

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