[backport/v1.1] Use gRPC-based liveness probe instead of tetra status #2480
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[upstream commit 6e17c79] Now, we use tetra status command to report the status of tetragon agent. This comes with some overheads as tetra binary has a lot of additional functionality and it seems like an overkill to use that for status reporting. On the other hand, k8s supports liveness probes by using an gRPC endpoint (i.e. https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-a-grpc-liveness-probe). This patch first creates a dedicated gRPC server to report agent status that can be used for the liveness probe. Signed-off-by: Anastasios Papagiannis <tasos.papagiannnis@gmail.com>
[upstream commit 2252857] The previous commit introduced a gRPC server that can be used for the liveness probe. This patch changes helm to make that default instead of the tetra status based liveness probe. The user can still use the tetra status based liveness probe by defining a values file similar to: tetragon: livenessProbe: timeoutSeconds: 60 exec: command: - tetra - status - --server-address - "54321" - --retries - "5" Signed-off-by: Anastasios Papagiannis <tasos.papagiannnis@gmail.com>
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May 29, 2024
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Backport #2478