doc: Restructure menu

Signed-off-by: Thomas Graf <thomas@cilium.io>

docs/content/en/docs/policy-library/_index.md

@@ -2,7 +2,5 @@
 title: "Policy Library"
 weight: 3
 description: >
-  Library of policies that implement Tetragon observability and runtime enforcement.
-  mechanisms.
+  Library Tetragon Policies
 ---
-

docs/content/en/docs/policy-library/observability/_index.md

@@ -0,0 +1,191 @@
+---
+title: "Tetragon Observability Policies"
+weight: 3
+description: >
+  Library of policies that implement Tetragon observability and runtime enforcement.
+  mechanisms.
+---
+
+
+## Index
+
+### System Activity
+
+- [eBPF activity]({{< ref "#ebpf" >}})
+- [Kernel module audit trail]({{< ref "#kernel-module" >}})
+- [Library loading]({{< ref "#library" >}})
+
+### Security Sensitive Events
+
+- [Binary execution in /tmp]({{< ref "#tmp-execs" >}})
+- [sudo Monitoring]({{< ref "#sudo" >}})
+
+### Networking
+
+- [Network activity of SSH daemon]({{< ref "#ssh" >}})
+- [Outbound Connections]({{< ref "#egress-connections" >}})
+
+
+# Observability Policies
+
+## eBPF Subsystem Interactions {#ebpf}
+
+This policy adds monitoring of all BPF programs loaded and file operations over the
+BPFFS. The BPFFS is where map file descriptors live allowing programs access to the
+BPF user to kernel space.
+
+To apply the policy use kubect apply,
+
+```shell-session
+kubectl apply -f https://raw.githubusercontent.com/cilium/tetragon/main/examples/policylibrary/bpf.yaml
+```
+
+Now we can do inspect the data to learn interesting things about the system. For example
+to find all loaded programs on the system,
+
+```shell-session
+
+```
+
+Or all programs writing to a BPF map,
+
+```shell-session
+```
+
+Similarly we might be concerned about all reads,
+
+```shell-session
+```
+
+Continue to explore the data set to learn interesting things here.
+
+## Kernel Module Audit Trail {#kernel-module}
+
+This policy adds monitoring of all BPF programs loaded and file operations over the
+BPFFS. The BPFFS is where map file descriptors live allowing programs access to the
+BPF user to kernel space.
+
+To apply the policy use kubect apply,
+
+```shell-session
+kubectl apply -f https://raw.githubusercontent.com/cilium/tetragon/main/examples/policylibrary/bpf.yaml
+```
+
+Now we can do inspect the data to learn interesting things about the system. For example
+to find all loaded programs on the system,
+
+```shell-session
+
+```
+
+Or all programs writing to a BPF map,
+
+```shell-session
+```
+
+Similarly we might be concerned about all reads,
+
+```shell-session
+```
+
+
+## Library version monitoring {#library}
+
+This policy adds library monitoring to Tetragon.
+
+To apply the policy use kubect apply,
+
+```shell-session
+kubectl apply -f https://raw.githubusercontent.com/cilium/tetragon/main/examples/policylibrary/library.yaml
+```
+
+This will record library loads. To find all use of a specific library use
+the following, in this case checking std C library.
+
+```shell-session
+
+```
+
+We can further restrict to only find versions before some number by adding
+a versoin check.ontinue to explore the data set to learn interesting things here.
+
+## Binary Execution in /tmp {#tmp-execs}
+
+This policy adds monitoring of any executions in the /tmp directory.
+
+For this we can simply query the default execution data showing even
+the base feature set of exec tracing can be useful.
+
+To find all executables from /tmp
+
+```shell-session
+# kubectl logs -n kube-system ds/tetragon -c export-stdout | jq 'select(.process_exec != null) | select(.process_exec.process.binary | contains("/tmp/")) | .process_exec.process |  "\(.binary) \(.pod.namespace) \(.pod.name)"'
+"/tmp/nc default xwing"
+"/tmp/nc default xwing"
+"/tmp/nc default xwing"
+"/tmp/nc default xwing"
+
+```
+
+## sudo Invocation Monitoring {#sudo}
+
+This policy adds sudo monitoring to Tetragon.
+
+To apply the policy use kubect apply,
+
+```shell-session
+kubectl apply -f https://raw.githubusercontent.com/cilium/tetragon/main/examples/policylibrary/sudo.yaml
+```
+
+To find any sudo operatoins,
+
+```shell-session
+
+```
+
+## SSHd connection monitoring {#ssh-network}
+
+This policy adds monitoring of all network connections accepted by SSHd to Tetragon.
+
+To apply the policy use kubect apply,
+
+```shell-session
+kubectl apply -f https://raw.githubusercontent.com/cilium/tetragon/main/examples/policylibrary/acceptsshd.yaml
+```
+
+To find all sessions over SSHd,
+
+```shell-session
+
+```
+
+## Outbound connections {#egress-connections}
+
+This policy adds monitoring of all BPF programs loaded and file operations over the
+BPFFS. The BPFFS is where map file descriptors live allowing programs access to the
+BPF user to kernel space.
+
+To apply the policy use kubect apply,
+
+```shell-session
+kubectl apply -f https://raw.githubusercontent.com/cilium/tetragon/main/examples/policylibrary/bpf.yaml
+```
+
+Now we can do inspect the data to learn interesting things about the system. For example
+to find all loaded programs on the system,
+
+```shell-session
+
+```
+
+Or all programs writing to a BPF map,
+
+```shell-session
+```
+
+Similarly we might be concerned about all reads,
+
+```shell-session
+```
+
+Continue to explore the data set to learn interesting things here.