helm: enableLsmSensor flag #3485
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This flag allows to mount (read-only) /sys/kernel/security directory in Tetragon container. /sys/kernel/security/lsm file is used to check if LSM BPF is enabled on system. Signed-off-by: Andrei Fedotov <[email protected]>
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This flag allows to mount (read-only)
/sys/kernel/securitydirectory in Tetragon container./sys/kernel/security/lsmfile is used to check if LSM BPF is enabled on system.Description
It was a long story about how we tried to fix LSM sensor for k8s environment: #3392 #3404 #3456.
The only way is to mount
/sys/kernel/security directoryto Tetragon container . It works fine, I tested on my minikube cluster.minikube start --driver=docker --mount --mount-string="/sys/kernel/security:/sys/kernel/security" --memory=8096 --cpus=8 minikube ssh -- sudo mount bpffs -t bpf /sys/fs/bpfInstall Tetragon:
helm install --namespace kube-system \ --set tetragon.grpc.address="unix:///var/run/cilium/tetragon/tetragon.sock" \ --set tetragon.enableLsmSensor=true \ tetragon .Demo Pod:
Apply Policy and monitor logs:
kubectl apply -f ./go/src/github.com/cilium/tetragon/examples/tracingpolicy/lsm_file_open.yaml kubectl exec -ti -n kube-system ds/tetragon -c tetragon -- tetra getevents -o compact --pods xwingCheck policy: