Skylight sensor agents 22.11 Release Notes

Overview

Accedian is pleased to announce release 22.11 of Skylight sensor: agents.

Note

Starting with release 22.11 the container image names have been shortened to the format agent-AGENTTYPE-PLATFORM:RELEASE, example:
agent-throughput-amd64:r22.11

See section "Agent Installation" for updated docker pull strings

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What's New

Release 22.11 of the Skylight sensor: agent contains a number of new features and functions compared to the previous 22.07 and 22.04 releases:

• New agent - trace supporting L3-L4 path tracing with A/B comparative path views in Analytics
• Per-session namespace / VRF support for all agents
• Management API backwards compatible with 22.07
• Updated helm charts for kubernetes deployment
• Updated status tool for troubleshooting

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Release Components

Component	Version	Note
agent throughput X86_64 / AMD64	22.11_1386
agent actuate X86_64 / AMD64	22.11_1367
agent trace X86_64 / AMD64	22.11_1390
agent transfer X86_64 / AMD64	22.11_77
agent sdk X86_64 / AMD64	22.11_1386
agent throughput ARM64	22.11_1386
agent actuate ARM64	22.11_1373
agent trace ARM64	22.11_1390
agent transfer ARM64	22.11_77
agent sdk ARM64 / AMD64	22.11_1386
orchestration	0.99.0	component of Skylight analytics 22.11
roadrunner	0.395.0 or later

Agent Characteristics and Capabilities

agent	capability	max use count	vCPU* 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	100 (sequentially executed)	0.1 core	0.1GB	0.2GB
transfer	TCP L7 https/ftp/tcp	250 (sequentially executed)	0.1 core	0.1GB	0.2GB
roadrunner data proxy	-	-	4 cores	8GB	10GB	2,500 concurrent sessions

A vCPU is considered as a thread on standard x86 CPU, running typically at 2.2 to 2.4GHz

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Notes:
Max use count refers to the number of sessions per agent instance, multiple agents can be deployed on the same host to increase session count.
Paris/Dublin, in the Capability column, represents two different algorithms for trace route.

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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 22.11 is backwards compatible with the docker-compose configuration of 22.07, 22.04 and 21.12, which means the agent can be updated by changing the release version in the docker compose file.

Agent session configuration in the orchestration is compatible with 22.07, so no session or test configuration changes are required when upgrading agents or Analytics to 22.22.

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Deployment Considerations

The sensor: agents deploy as containers on x86_64 and arm64 environments. Thus, a container environment is required and we recommend docker 20.10.0 or later.

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Corrected Issues

ID	description	details
SA-825	Agent orchestration API	Sorting by AgentName is not working in /api/orchestrate/v3/agents/configuration Fixed in 22.11

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Known Issues

ID	description	workaround
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
SA-821	Control API: Deleting multiple objects in parallel may fail of more than 10 requests in parallel	Check for HTTP error 502 bad gateway and re-send the query
SA-1093	throughput: reflector mode does not work fully in k8s	Only TCP port can be forwarded into container, not UDP - this makes baseline test fail
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