chaos-daemon: remove host ipc

[YangKeao]

What problem does this PR solve?

Fix #2845 . With hostIPC, the /dev/shm on the host will be mounted to the container. As I know, the hostIPC was brought with TimeChaos, and I'm not sure whether it's really needed, we can see in the test.

A more surprising thing is that even with priviledged, the chaos-daemon can successfully start. As I have tested, the following chaos works well:

• PodChaos
• NetworkChaos
• TimeChaos

The following chaos doesn't work:

• DNSChaos
• IOChaos
• StressChaos
• HTTPChaos

Need further discussion about why they didn't work. I noticed that the sidecar injection test also fails.

[ti-chi-bot]

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• STRRL
• cwen0

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[YangKeao]

For HTTPChaos, the e2e-test fails to dial the helper.

STEP: waiting on e2e helper ready
Feb 10 08:54:41.974: INFO: Err : Get "http://10.41.0.100:31428/ping": context deadline exceeded (Client.Timeout exceeded while awaiting headers) , IP : 10.41.0.100
Feb 10 08:54:53.977: INFO: Err : Get "http://10.41.0.100:31428/ping": context deadline exceeded (Client.Timeout exceeded while awaiting headers) , IP : 10.41.0.100

[YangKeao]

/run-e2e-tests

[STRRL]

The following chaos doesn't work:

DNSChaos
IOChaos
StressChaos
HTTPChaos

What does this mean? I saw the e2e tests succeed. Only not work in rootless containers?

[YangKeao]

What does this mean? I saw the e2e tests succeed. Not work only in rootless containers?

Yes. (But I don't know why actually. It needs more investigation, but it's fine to merge this PR)

[STRRL]

LGTM!

[cwen0]

The following chaos doesn't work:

• DNSChaos
• IOChaos
• StressChaos
• HTTPChaos

Need further discussion about why they didn't work. I noticed that the sidecar injection test also fails.

Do these chaos types work well if set hostIPS to true?

[YangKeao]

The following chaos doesn't work:

• DNSChaos
• IOChaos
• StressChaos
• HTTPChaos

Need further discussion about why they didn't work. I noticed that the sidecar injection test also fails.

Do these chaos types work well if set hostIPS to true?

No. chaos-daemon cannot start up with hostIPS. See #2845

[YangKeao]

@cwen0 PTAL

[cwen0]

LGTM

[cwen0]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 220fd90