182 lines
16 KiB
Go
182 lines
16 KiB
Go
// Package capability is the agent's privileged-capability self-check (slice 1 of agent
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// self-health). It declares the MANIFEST — the (binary, representative-arg-vector) pairs the
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// non-root agent depends on running via `sudo -n` — and a PROBE that lists each against the live
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// sudoers policy (`sudo -n -l`, never executing) + checks the binary exists. The result is a
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// snapshot the agent attaches to its hub report; the hub owns the ok→degraded transition + alert.
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//
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// Why this exists: the 2026-06-28 root→non-root cutover dropped several grants from
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// configs/felhom-agent.sudoers (lxc-info, make-private, restart dnsmasq, …). Each broke a feature
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// silently until a user hit it (the multi-drive flapping incident, audit 2026-06-29). A non-root
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// agent that can't run a command it depends on is DEGRADED and must SAY so — at cutover, not days
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// later. The companion build-time test (manifest_test.go) asserts every manifest vector is covered
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// by a sudoers pattern, catching authoring gaps in CI before they ship.
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package capability
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import (
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"strings"
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"gitea.dooplex.hu/admin/felhom-agent/internal/escrow"
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)
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// Capability is one privileged command the agent depends on. Name is a stable id; Feature is the
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// human-readable thing that breaks if the grant is missing (used in logs + the operator alert).
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// Binary is the absolute path the runner invokes; ReprArgs is a CONCRETE argument vector that
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// matches the corresponding sudoers glob (e.g. a vmid "9201" matches `[0-9]*`, a device "/dev/sda"
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// matches `/dev/*`). Critical marks the user-facing ones — the hub alerts only when a Critical
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// capability is degraded (non-critical degradations still ride the report snapshot + agent log).
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type Capability struct {
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Name string
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Feature string
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Binary string
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ReprArgs []string
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Critical bool
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// GatedBy names the config gate this capability sits behind ("" = always active). A healthy
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// probe of a gated capability whose gate is OFF reports StatusInactive instead of ok — see
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// Prober.GateActive. Broken plumbing stays degraded regardless of the gate.
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GatedBy string
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}
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// GatePBSDR is the gate id for the PBS-DR tier: active when this box carries a live (enabled)
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// pbs_dr descriptor or a previously-converged marker (pbsdr.Manager.DRConfigured).
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const GatePBSDR = "pbs_dr"
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// Manifest is the required set, seeded from the 2026-06-29 sudoers audit (felhom-agent/REPORT.md):
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// the OK + newly-CLOSED rows. The SURFACED/DEFERRED rows are deliberately EXCLUDED — they are not
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// required capabilities: the general `pct exec <vmid> -- *` (controller-swap; arbitrary exec, an
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// open operator decision), `pct create` (golden build, maintenance, no daemon caller), `mount
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// UUID=…` (legacy/unreferenced), and the callerless `sensors -j`. Adding them here would assert
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// grants the agent neither has nor should depend on.
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//
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// Each ReprArgs is a representative instance; the probe LISTS it (`sudo -n -l`) and never runs it,
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// so even mkfs/pct-set entries are side-effect-free to probe.
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//
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// Gating (v0.86.0): every `pbsdr-*` capability is behind GatePBSDR — the whole pbsdr vector IS
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// the DR-tier apply path, so the gate rides the stable name prefix (a new pbsdr-* op is gated
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// automatically; nothing else ever is). Applied here, not in the literals, to keep the manifest
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// entries positional.
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func Manifest() []Capability {
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out := make([]Capability, len(manifest))
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copy(out, manifest)
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for i := range out {
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if strings.HasPrefix(out[i].Name, "pbsdr-") {
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out[i].GatedBy = GatePBSDR
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}
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}
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return out
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}
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// reprFingerprint is a shape-valid all-zero SHA-256 colon fingerprint for list-mode repr vectors
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// (matches the wrapper's fingerprint validation; never executed).
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const reprFingerprint = "00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00"
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var manifest = []Capability{
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// ---- Intermediary drive model (the multi-drive path — mostly Critical) ----
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{"guest-init-pid", "drive-gate guest-sees check (multi-drive concurrency)", "/usr/bin/lxc-info", []string{"-n", "9201", "-p", "-H"}, true, ""},
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{"parent-self-bind", "intermediary shared-parent self-bind", "/usr/bin/mount", []string{"--bind", "/mnt/felhom-drives", "/mnt/felhom-drives"}, true, ""},
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{"parent-make-shared", "intermediary shared-parent propagation", "/usr/bin/mount", []string{"--make-shared", "/mnt/felhom-drives"}, true, ""},
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{"parent-make-private", "intermediary shared-parent peer-group isolation", "/usr/bin/mount", []string{"--make-private", "/mnt/felhom-drives"}, true, ""},
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{"drive-bind", "drive attach (felhom-data bind under parent)", "/usr/bin/mount", []string{"--bind", "/mnt/felhom-usb/felhom-data", "/mnt/felhom-drives/felhom-usb"}, true, ""},
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{"drive-umount", "drive detach (fail-closed unmount)", "/usr/bin/umount", []string{"/mnt/felhom-drives/felhom-usb"}, true, ""},
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{"drives-mkdir-parent", "stable parent dir create", "/usr/bin/mkdir", []string{"-p", "/mnt/felhom-drives"}, false, ""},
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{"drives-mkdir-sub", "per-drive stable dir create", "/usr/bin/mkdir", []string{"-p", "/mnt/felhom-drives/felhom-usb"}, false, ""},
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{"drives-mkdir-data", "felhom-data namespace create", "/usr/bin/mkdir", []string{"-p", "/mnt/felhom-usb/felhom-data"}, false, ""},
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{"drives-chown-data", "felhom-data guest-root chown", "/usr/bin/chown", []string{"100000:100000", "/mnt/felhom-usb/felhom-data"}, false, ""},
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{"parent-script-install", "shared-parent boot script install", "/usr/bin/install", []string{"-m", "0755", "--", "/tmp/felhom-shared-parent-123456789.sh", "/usr/local/sbin/felhom-shared-parent.sh"}, false, ""},
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{"parent-unit-install", "shared-parent boot unit install", "/usr/bin/install", []string{"-m", "0644", "--", "/tmp/felhom-shared-parent-123456789.service", "/etc/systemd/system/felhom-shared-parent.service"}, false, ""},
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{"parent-unit-enable", "shared-parent boot-persistence enable", "/usr/bin/systemctl", []string{"enable", "felhom-shared-parent.service"}, false, ""},
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{"parent-bind-mp8", "parent bind into guest at provision", "/usr/sbin/pct", []string{"set", "9201", "-mp8", "/mnt/felhom-drives"}, false, ""},
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// ---- Disk inspect / format gate (Critical: the data-bearing classifier + format) ----
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{"disk-blkid", "disk data-bearing classify (format gate)", "/usr/sbin/blkid", []string{"-p", "-o", "export", "/dev/sda"}, true, ""},
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{"disk-lsblk", "disk topology read (format gate)", "/usr/bin/lsblk", []string{"-J", "-o", "NAME,FSTYPE,PTTYPE,MOUNTPOINT", "/dev/sda"}, true, ""},
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{"disk-mkfs-ext4", "guarded format (ext4)", "/usr/local/sbin/felhom-mkfs-guarded", []string{"/dev/sda", "ext4"}, true, ""},
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{"disk-mkfs-xfs", "guarded format (xfs)", "/usr/local/sbin/felhom-mkfs-guarded", []string{"/dev/sda", "xfs"}, false, ""},
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{"disk-smart", "disk SMART health read", "/usr/sbin/smartctl", []string{"-a", "-j", "/dev/sda"}, false, ""},
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{"disk-lvs", "thin-pool usage read", "/usr/sbin/lvs", []string{"--reportformat", "json", "--units", "b", "-o", "lv_name,data_percent,metadata_percent", "--", "pve/data"}, false, ""},
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// ---- Storage mount units (watchdog re-mount) ----
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{"mount-unit-install", "fs-UUID mount unit install", "/usr/bin/install", []string{"-o", "root", "-g", "root", "-m", "0644", "--", "/var/lib/felhom-agent/units/felhom-x.mount", "/etc/systemd/system/felhom-x.mount"}, false, ""},
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{"mount-daemon-reload", "systemd reload after unit write", "/usr/bin/systemctl", []string{"daemon-reload"}, false, ""},
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{"mount-unit-enable", "mount unit enable", "/usr/bin/systemctl", []string{"enable", "--now", "--", "felhom-x.mount"}, false, ""},
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{"mount-unit-disable", "mount unit disable", "/usr/bin/systemctl", []string{"disable", "--", "felhom-x.mount"}, false, ""},
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{"mount-unit-stop", "mount unit stop", "/usr/bin/systemctl", []string{"stop", "--", "felhom-x.mount"}, false, ""},
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// ---- Network storage re-arm + cleanup (CAMPAIGN-3 F10/F1) ----
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{"netmount-reset-failed", "NAS automount re-arm after start-limit (F10)", "/usr/bin/systemctl", []string{"reset-failed", "--", "mnt-felhom\\x2ddrives-media.automount"}, false, ""},
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{"netmount-rmdir", "removed-share mountpoint cleanup (F1)", "/usr/bin/rmdir", []string{"/mnt/felhom-drives/media"}, false, ""},
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// ---- Node self-heal (CAMPAIGN-3 F12-class, appliance-gated in code) ----
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{"selfheal-networking-start", "appliance networking recovery at boot (F12 defense in depth)", "/usr/bin/systemctl", []string{"start", "networking.service"}, false, ""},
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// ---- Provisioning back-half ----
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{"provision-chown", "bootstrap mount guest-root chown", "/usr/bin/chown", []string{"-R", "100000:100000", "/var/lib/felhom-agent/guests/9201"}, false, ""},
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{"provision-config-mount", "bootstrap config bind mount", "/usr/sbin/pct", []string{"set", "9201", "-mp0", "/var/lib/felhom-agent/guests/9201"}, false, ""},
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{"provision-onboot", "customer guest autostart (onboot)", "/usr/sbin/pct", []string{"set", "9201", "-onboot", "1"}, false, ""},
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// ---- Pre-start self-heal hook + guest lifecycle ----
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{"guesthook-install", "pre-start hook snippet install", "/usr/bin/install", []string{"-m", "0755", "--", "/tmp/felhom-guest-hook-123456789.sh", "/var/lib/vz/snippets/felhom-guest-hook.sh"}, false, ""},
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{"guesthook-register", "pre-start hook register", "/usr/sbin/pct", []string{"set", "9201", "--hookscript", "local:snippets/felhom-guest-hook.sh"}, false, ""},
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{"guesthook-delete-mp", "dead mountpoint slot delete (C1 net)", "/usr/sbin/pct", []string{"set", "9201", "--delete", "mp0"}, false, ""},
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{"guest-reboot", "enroll activate-binds reboot", "/usr/sbin/pct", []string{"reboot", "9201"}, false, ""},
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// ---- LAN split-horizon resolver (dnsmasq) ----
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{"dnsmasq-install", "dnsmasq package install", "/usr/bin/apt-get", []string{"install", "-y", "-q", "dnsmasq"}, false, ""},
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{"dnsmasq-write", "dnsmasq drop-in write", "/usr/bin/install", []string{"-m", "0644", "/tmp/felhom-resolver-x.conf", "/etc/dnsmasq.d/felhom-x.conf"}, false, ""},
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{"dnsmasq-enable", "dnsmasq enable", "/usr/bin/systemctl", []string{"enable", "--now", "dnsmasq"}, false, ""},
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{"dnsmasq-reload", "dnsmasq reload", "/usr/bin/systemctl", []string{"reload", "dnsmasq"}, false, ""},
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{"dnsmasq-restart", "dnsmasq restart (LAN-DNS self-heal)", "/usr/bin/systemctl", []string{"restart", "dnsmasq"}, false, ""},
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{"dnsmasq-rm", "dnsmasq drop-in remove (decommission)", "/usr/bin/rm", []string{"-f", "/etc/dnsmasq.d/felhom-x.conf"}, false, ""},
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{"dnsmasq-guest-ip", "guest LAN IP discovery", "/usr/sbin/pct", []string{"exec", "9201", "--", "ip", "-4", "-o", "addr", "show", "dev", "eth0"}, false, ""},
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{"dnsmasq-guest-domain", "guest domain discovery", "/usr/sbin/pct", []string{"exec", "9201", "--", "docker", "exec", "felhom-controller", "cat", "/opt/docker/felhom-controller/controller.yaml"}, false, ""},
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// ---- Controller-swap / managed auto-update (FELHOM_CONTROLLERSWAP, v0.45.0; Critical: a
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// silently-broken fleet auto-update is operator-alert-worthy) ----
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{"controllerswap-read", "controller-swap / managed auto-update", "/usr/sbin/pct", []string{"exec", "9201", "--", "cat", "/etc/felhom-controller-image"}, true, ""},
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{"controllerswap-image-inspect", "controller-swap / managed auto-update", "/usr/sbin/pct", []string{"exec", "9201", "--", "docker", "image", "inspect", "gitea.dooplex.hu/admin/felhom-controller:0.0.0"}, true, ""},
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{"controllerswap-inspect", "controller-swap / managed auto-update", "/usr/sbin/pct", []string{"exec", "9201", "--", "docker", "inspect", "-f", "{{.State.Running}}", "felhom-controller"}, true, ""},
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{"controllerswap-restart", "controller-swap / managed auto-update", "/usr/sbin/pct", []string{"exec", "9201", "--", "systemctl", "restart", "felhom-controller-bootstrap.service"}, true, ""},
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{"controllerswap-write", "controller-swap / managed auto-update", "/usr/sbin/pct", []string{"exec", "9201", "--", "tee", "/etc/felhom-controller-image"}, true, ""},
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// ---- Stale-lock recovery (FELHOM_STALELOCK, v0.49.0; Critical: a guest stuck behind a stale
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// reboot-during-backup lock can't start → the customer box stays DOWN until this clears it) ----
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{"stalelock-unlock", "reboot-during-backup stale-lock recovery", "/usr/sbin/pct", []string{"unlock", "9201"}, true, ""},
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// ---- Offsite WG tunnel (FELHOM_WG, S3/v0.64.0; Critical FLIPPED in S4/v0.66.0 — offsite
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// backups now RIDE the tunnel, so a degraded tunnel capability is operator-alert-worthy: the
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// conf install, unit enable/restart and the handshake read gate the backup path. apt-install
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// (one-time bootstrap) and disable (revocation, a deliberate teardown) stay non-critical. The
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// handshake read is the ONLY wg invocation (never `dump`). ----
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{"wg-tools-install", "wireguard-tools package install", "/usr/bin/apt-get", []string{"install", "-y", "-q", "wireguard-tools"}, false, ""},
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{"wg-conf-install", "wg-felhom conf install", "/usr/bin/install", []string{"-o", "root", "-g", "root", "-m", "0600", "--", "/var/lib/felhom-agent/wg/wg-felhom.conf", "/etc/wireguard/wg-felhom.conf"}, true, ""},
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{"wg-enable", "wg-quick@wg-felhom enable", "/usr/bin/systemctl", []string{"enable", "--now", "wg-quick@wg-felhom"}, true, ""},
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{"wg-restart", "wg-quick@wg-felhom restart (conf change)", "/usr/bin/systemctl", []string{"restart", "wg-quick@wg-felhom"}, true, ""},
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{"wg-disable", "wg-quick@wg-felhom disable (revocation)", "/usr/bin/systemctl", []string{"disable", "--now", "wg-quick@wg-felhom"}, false, ""},
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{"wg-handshake-read", "tunnel handshake-age read", "/usr/bin/wg", []string{"show", "wg-felhom", "latest-handshakes"}, true, ""},
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// ---- PBS DR tier apply (FELHOM_PBSDR, slice 2). NON-critical (the selfupdate rationale):
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// applying the tier is an occasional hub-driven provisioning op, not a steady-state serving
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// path — a degraded grant means "can't provision/reconcile the PBS entry" (the bridge reports
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// loudly anyway), not a serving outage. The steady-state backup path is covered by the wg +
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// storage capabilities. List-mode representations only; never executed. ----
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{"pbsdr-create", "PBS DR storage-entry create (K autogen)", "/usr/local/sbin/felhom-pbs-apply", []string{"create", "felhom-pbs", "10.77.0.1", "felhom-offsite", "ns0", "felhom@pbs!ns0", reprFingerprint, "/etc/pve/priv/storage"}, false, ""},
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{"pbsdr-reconcile", "PBS DR storage-entry reconcile (set-only)", "/usr/local/sbin/felhom-pbs-apply", []string{"reconcile", "felhom-pbs", "10.77.0.1", "ns0", "felhom@pbs!ns0", reprFingerprint, "/etc/pve/priv/storage"}, false, ""},
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{"pbsdr-grant", "PBS DR storage ACL self-grant", "/usr/local/sbin/felhom-pbs-apply", []string{"grant", "felhom-pbs"}, false, ""},
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// ---- Escrow ceremony (FELHOM_ESCROW, controller-driven, v0.88.0). Critical: the customer
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// wizard's whole run path IS this one grant — a dropped line silently breaks every ceremony.
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// GatedBy is set EXPLICITLY (the name deliberately says "escrow", not "pbsdr-": the feature is
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// the ceremony, but it only exists behind the DR tier — no PBS key, no ceremony). ReprArgs is
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// the SHARED argv constant (internal/escrow/ceremony.go) — the exec runner uses the same one,
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// so runner ↔ manifest can't drift, and TestManifestCoveredBySudoers locks manifest ↔ sudoers.
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// List-mode probe only (`sudo -n -l`), spike-confirmed side-effect-free — never a real ceremony.
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{"escrow-ceremony", "customer recovery-code ceremony (controller-driven)", escrow.CeremonyBinary, escrow.CeremonyArgs(), true, GatePBSDR},
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// ---- Agent self-update (FELHOM_SELFUPDATE, D1). NON-critical: self-update is an occasional
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// operator-driven op, not a steady-state serving path — a degraded grant means "can't
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// self-update" (fall back to a manual SSH deploy), not a serving outage. The apply repr uses a
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// staging-dir path + a placeholder sha (list-mode never runs it). ----
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{"selfupdate-apply", "agent self-update apply (A/B flip)", "/usr/local/sbin/felhom-selfupdate-guarded", []string{"apply", "/var/lib/felhom-agent/selfupdate/felhom-agent-0.0.0", "0000000000000000000000000000000000000000000000000000000000000000"}, false, ""},
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{"selfupdate-commit", "agent self-update commit", "/usr/local/sbin/felhom-selfupdate-guarded", []string{"commit"}, false, ""},
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{"selfupdate-rollback", "agent self-update rollback", "/usr/local/sbin/felhom-selfupdate-guarded", []string{"rollback"}, false, ""},
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}
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