Skylight sensor agents 23.04 Release Notes
  • 10 Apr 2023
  • 3 Minutes to read
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Skylight sensor agents 23.04 Release Notes

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Article summary

Overview

Accedian is pleased to announce release 23.04 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:r23.04

See section "Agent Installation" for current docker pull strings


What's New

Release 23.04 of the Skylight sensor: agent contains a number of new features and functions compared to the previous 22.11 and 22.07 releases:

  • New UI component in Analytics to manage actuate and throughput agents - trace and transfer will be added in the next release
  • Improved parameter support for agent transfer - full proxy server support
  • Agent actuate now scaled to support 500 simultaneous sessions
  • Support for generic configuration objects for agent SDK
  • Enhanced support for running agents on Cisco Third-Party-Application space
  • Logs for troubleshooting now available to download via UI or API from agents via "Generated report file"

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Release Components

ComponentVersionNote
agent throughput X86_64 / AMD6423.04_1668
agent actuate X86_64 / AMD6423.04_1668
agent trace X86_64 / AMD6423.04_1668
agent transfer X86_64 / AMD6423.04_145
agent sdk X86_64 / AMD6423.04_1668
agent throughput ARM6423.04_1668
agent actuate ARM6423.04_1668
agent trace ARM6423.04_1668
agent transfer ARM6423.04_145
agent sdk ARM64 / AMD6423.04_1668
orchestration0.125.0component of Skylight analytics 23.04
roadrunner0.456.11 or later

Agent Characteristics and Capabilities

agentcapabilitymax use countvCPU* maxRAM maxDisk typicalcomment
actuateRFC5357 TWAMP light5000.05 - 1 core0.2-0.5GB0.2GB5000 pps per agent
actuateRFC5357 TWAMP control5000.05 - 1 core0.2-0.5GB0.2GB5000 pps per agent
actuateRFC862 UDP Echo5000.15 core0.3GB0.2GB5000 pps per agent
actuateRFC792 ICMP Echo5000.15 core0.3GB0.2GB5000 pps per agent
throughputRFC6349 baseline11 core0.1GB0.2GB1Gbps max
throughputRFC6349 throughput11 core0.1GB0.2GB10Gbps max
traceUDP/TCP/ICMP Paris100 (sequentially executed)0.1 core0.1GB0.2GB
transferTCP L7 https/ftp/tcp250 (sequentially executed)0.1 core0.1GB0.2GB
roadrunner data proxy--4 cores8GB10GB2,500 concurrent sessions

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


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.
CPU usage for actuate is shown as a range depending on load. Highest load is 5000 pps (for example 500 sessions of 10 pps each).
Paris, in the Capability column, represents the current algorithm for trace route.


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 23.04 is backwards compatible with the docker-compose configuration of 22.11, 22.07, 22.04 and 21.12, which means the agent can be updated by changing the release version and name in the docker compose file. Note that the release name for docker pull was shortened in release 22.11.

Agent session configuration in the orchestration is backwards compatible with 22.11, so no session or test configuration changes are required when upgrading agents or Analytics to 23.04.


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.


Corrected Issues

IDdescriptiondetails
SA-420Agent managementManagement over IPv6 caused issues on some linux platforms in AWS. Fixed in 23.04
SA-1172Packet IO on some Cisco router models not working (TPA space). Fixed in 23.04

Known Issues

IDdescriptionworkaround
SA-306Payload size for IPv6 TWAMP can be set to larger values than the MTUDo not use larger IPv6 payload size than 1452b
SA-509TWAMP-CP: When control session is down, data is not accepted into analyticsMake sure the (3rd party) TWAMP responder is up
SA-821Control API: Deleting multiple objects in parallel may fail of more than 10 requests in parallelCheck for HTTP error 502 bad gateway and re-send the query
SA-1093throughput: reflector mode does not work fully in k8sOnly TCP port can be forwarded into container, not UDP - this makes baseline test fail

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