pkg/metrics: add event for tracing policy metrics #927
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This patch adds metrics for tracing policy events. It uses the policy
name and a hook name as labels.
As an example, with this policy:
```
apiVersion: cilium.io/v1alpha1
kind: TracingPolicy
metadata:
name: "kubectlexec-net"
spec:
kprobes:
- call: "tcp_connect"
syscall: false
args:
- index: 0
type: "sock"
selectors:
- matchPIDs:
- operator: NotIn
followForks: true
isNamespacePID: true
values:
- 1
- call: "tcp_close"
syscall: false
args:
- index: 0
type: "sock"
selectors:
- matchPIDs:
- operator: NotIn
followForks: true
isNamespacePID: true
values:
- 1
- call: "tcp_sendmsg"
syscall: false
args:
- index: 0
type: "sock"
- index: 2
type: int
# follow any non-init pids (e.g., exec into container)
selectors:
- matchPIDs:
- operator: NotIn
followForks: true
isNamespacePID: true
values:
- 1
```
We will see the following events:
```
tetragon_policy_stats{binary="/usr/bin/curl",hook="kprobe:tcp_close",namespace="default",pod="pizza",policy="kubectlexec-net"} 1 │
tetragon_policy_stats{binary="/usr/bin/curl",hook="kprobe:tcp_connect",namespace="default",pod="pizza",policy="kubectlexec-net"} 1 │
tetragon_policy_stats{binary="/usr/bin/curl",hook="kprobe:tcp_sendmsg",namespace="default",pod="pizza",policy="kubectlexec-net"} 1
```
Signed-off-by: Kornilios Kourtis <kornilios@isovalent.com>
mtardy
approved these changes
Apr 14, 2023
| @@ -34,6 +35,12 @@ var ( | |||
| Help: "The total number of events dropped because listener buffer was full", | |||
| ConstLabels: nil, | |||
| }, nil) | |||
|
|
|||
mtardy
reviewed
Apr 14, 2023
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This patch adds metrics for tracing policy events. It uses the policy name and a hook name as labels.
As an example, with this policy:
We will see the following events: