runc tips — authorized oci runtime literacy

Snapshot

Tip checklist (authorized only)

1. Confirm you may run runc on the lab host (syllabus box you own or were given access to).
2. Prefer documenting who / why / ticket before any pull/push/run — never poke production engines without change control.
3. Record short factual notes; quote short Evidence (image name, digest, id — never registry tokens or secret mounts).
4. Optional: runtime peer → podman-tips.
5. Optional: namespace peer → nsenter-tips / unshare-tips.
6. Prefer disposable lab images/registries for runc drills; quote non-secret labels afterward as Evidence.
7. Prefer read-only inspect/list modes for most Evidence binders unless the syllabus asks for write drills.
8. Stop at literacy — no attack or unauthorized container-escape cookbooks.

Allowed framing

• Classroom labs reviewing runc on authorized disposable engines (runc list / state / spec on lab bundles).
• Binding short factual notes as Evidence (image/id/network — no secrets).
• Documenting expected vs observed oci runtime literacy for authorized inventory notes.
• Comparing runc ↔ peer tip pages under one binder.
• Testing write/push/run only when the syllabus authorizes that drill on lab resources.

Scope we will not cover

• No crack/pirate/keygen via runc.
• No intentional unauthorized container escapes or privileged mounts against foreign hosts.
• No secret-theft or credential harvesting via secret mounts / registry tokens on hosts you do not own.
• No cookbooks that weaken seccomp/AppArmor/SELinux or escape OCI containers on foreign hosts without authorization.

Beginner path (authorized only)

1. Obtain one syllabus-approved disposable lab host with a usable runc toolchain.
2. Prefer a throwaway lab image/registry before any write drill.
3. With authorization, run a syllabus-approved runc list/inspect; quote non-secret labels as Evidence (runc list / runc state against a lab bundle the syllabus provides).
4. Optional: peer tip pages above when the syllabus asks.
5. Stop at literacy — no attack or unauthorized escape cookbooks.

Practical notes for authorized labs

• runc is the low-level OCI runtime — keep Evidence labels distinct from higher-level podman-tips / nerdctl UX.
• Pair with nsenter-tips / unshare-tips only for syllabus-approved namespace literacy on lab hosts.
• Registry logins and secret mounts may embed credentials — never paste them into notes or git.
• Prefer documenting image/name/network labels the syllabus authorized without dumping full secret inspect JSON.
• Never commit runc dumps with secrets to git — even for labs.
• Label lab-only artifacts clearly so they are not mistaken for production posture.
• Prefer documenting bundle path + container id labels — never paste rootfs secrets or process env dumps into notes.

FAQ-aligned refusals (quick)

• Foreign-host container inspect / escape → refuse.
• Unauthorized seccomp/AppArmor weaken / container-escape cookbooks → refuse.
• Attack/credential-theft framing → refuse.

For legal, authorized and educational use only.

FAQ

Sources