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Problem
When installing the new Kubernetes cluster collector (Checkmk 2.1), the following error appears (in the Kubernetes event logs)
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Error: failed to start container "cadvisor": Error response from daemon: linux spec capabilities: Unknown capability to add: "CAP_CAP_SYS_PTRACE" |
This happens when you are using older container runtime versions, which always add CAP_ to each capability drop.
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| This problem is fixed in Docker 19.03 and containerd 1.4.5 |
Solution
Change in the values.yaml under nodeCollector.cadvisor.securityContext:
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capabilities:
drop:
- ALL
add: ["SYS_PTRACE"] |
(Remove the "CAP_")
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