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High CPU utilization on ssh_service start-up #1886

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kontsevoy opened this issue Apr 18, 2018 · 0 comments · Fixed by #1932
Closed

High CPU utilization on ssh_service start-up #1886

kontsevoy opened this issue Apr 18, 2018 · 0 comments · Fixed by #1932
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@gravitational-jenkins
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bug
Milestone
2.6.0 "Austin"

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@kontsevoy
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Problem

I have a Raspberry Pi which runs ssh_service only, i.e. no auth/proxy. The latest builds of Teleport eat 100% of one CPU core for a few minutes on startup. This actually causes extremely long deployment cycles leading Ansible timing out sometimes.

... not to mention that eating a 100% of CPU, even if temporarily, is not nice :)

Investigation

@russjones believes this is related to the recording proxy.

Validating the fix

Ping @kontsevoy to validate the fix, I have a couple of Pis + deployment pipeline to push a new binary.
@kontsevoy kontsevoy added the bug label Apr 18, 2018
@kontsevoy kontsevoy added this to the 2.6.0 "Austin" milestone Apr 18, 2018
@kontsevoy kontsevoy added the P1 label Apr 24, 2018
@kontsevoy kontsevoy mentioned this issue May 2, 2018
Closed
@klizhentas klizhentas mentioned this issue May 4, 2018
Merged
klizhentas added a commit that referenced this issue May 4, 2018
@klizhentas
Precompute keys only for auth and proxies.
0749618 
This commit fixes #1886

Previously the code was precomputing keys
even for SSH nodes, that do not need precomputed
private keys pool.
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@gravitational-jenkins gravitational-jenkins

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Precompute keys only for auth and proxies. gravitational/teleport
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@kontsevoy @gravitational-jenkins