3180f7b5ac
k-gamingcom symptom (2026-05-02): the on-device agent successfully finished Tier-3 bring-up, but the shipper sits in "waiting on mTLS material" because the cert auto-fetch step in install-lab-host.sh either ran with host_id still REPLACE_ME, or hit a transient bootstrap.wg failure, and there's no automatic retry. The Pi-side cert IS minted and the bootstrap endpoint serves it — the failure mode is purely "lab-host hasn't pulled it down." Fix: extract the cert-fetch logic into scripts/fetch-lab-host-cert.sh (idempotent, no-op when certs are already on disk, no-op when host_id is unset, exit-0 on transient network failure so the unit doesn't get pinned as failed), and run it from a 5-minute systemd timer. The timer handles all three "stuck waiting on mTLS" cases without operator action: - operator edited host_id post-install but didn't re-run install - bootstrap.wg was briefly unreachable during install - lab host was offline when install ran but came up later The script `try-restart`s cis490-shipper after a successful fetch so the daemon picks up the new cert immediately instead of waiting for its lazy retry. install-lab-host.sh still calls the script on install for fast first-time bring-up — the timer is the safety net. Tarball extract is staged through a temp dir + atomic rename so a mid-extract crash never leaves us with a mismatched cert/key pair. AGENTS.md row 4 updated: "waiting on mTLS material" remediation now points at the timer, with the exact `systemctl start cis490-cert-fetch.service` command to force an immediate retry. Tests: 267/267 unchanged. The fetch script is idempotent + has all its happy/error paths handled inline; a unit test would mostly be testing systemd's behaviour. The integration test path is the timer running on a real lab host, which is the actual production case. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
325 lines
15 KiB
Bash
Executable file
325 lines
15 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Install / refresh the CIS490 lab-host role.
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#
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# Idempotent — safe to re-run after `git pull`. Does NOT enroll the
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# host into WireGuard (that's wg-enroll's job, run separately and
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# *first*) and does NOT mint TLS certs (that's wg-pki's job).
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#
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# Steps:
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# 1. Verify prereqs (KVM, zstd, qemu, python3.11+, systemd).
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# 2. Create the cis490 service user + /var/lib/cis490 layout.
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# 3. Sync the repo into /opt/cis490 and build a uv-managed venv.
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# 4. Install systemd units from etc/.
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# 5. Drop /etc/cis490/lab-host.toml (only on first install).
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#
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# Operator finishes by:
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# - editing /etc/cis490/lab-host.toml (host_id, receiver URL, certs)
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# - placing leaf certs at /etc/cis490/certs/{lab-host.pem,key,wg-ca.pem}
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# - `systemctl enable --now cis490-shipper`
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set -euo pipefail
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REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
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INSTALL_ROOT="${INSTALL_ROOT:-/opt/cis490}"
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DATA_ROOT="${DATA_ROOT:-/var/lib/cis490}"
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ETC_ROOT="${ETC_ROOT:-/etc/cis490}"
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SERVICE_USER="${SERVICE_USER:-cis490}"
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log() { printf '[install-lab-host] %s\n' "$*" >&2; }
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die() { log "FATAL: $*"; exit 1; }
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# --- 1. prereqs --------------------------------------------------------
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log "checking prereqs"
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if [[ $EUID -ne 0 ]]; then
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die "must run as root (writes to /opt, /etc, /var/lib, and systemd)"
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fi
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command -v systemctl >/dev/null || die "systemd not found"
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command -v qemu-system-x86_64 >/dev/null || die "qemu-system-x86_64 not on PATH"
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command -v zstd >/dev/null || die "zstd not on PATH (apt install zstd)"
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[[ -e /dev/kvm ]] || die "/dev/kvm missing — KVM not available"
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# uv is preferred (lockfile-driven). Fall back to system pip if absent.
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USE_UV=0
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if command -v uv >/dev/null; then USE_UV=1; fi
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# --- 2. user + layout --------------------------------------------------
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log "ensuring service user $SERVICE_USER"
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if ! id -u "$SERVICE_USER" >/dev/null 2>&1; then
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useradd --system --no-create-home --shell /usr/sbin/nologin \
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--home-dir "$INSTALL_ROOT" "$SERVICE_USER"
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fi
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# kvm group lets the service spawn VMs.
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if getent group kvm >/dev/null 2>&1; then
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usermod -a -G kvm "$SERVICE_USER" || true
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fi
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install -d -o root -g root -m 0755 "$ETC_ROOT" "$ETC_ROOT/certs"
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install -d -o "$SERVICE_USER" -g "$SERVICE_USER" -m 0755 \
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"$DATA_ROOT" "$DATA_ROOT/data" \
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"$DATA_ROOT/data/episodes" "$DATA_ROOT/data/outbox" \
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"$DATA_ROOT/data/shipped" "$DATA_ROOT/data/queue" \
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"$DATA_ROOT/samples" "$DATA_ROOT/samples/store" \
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"$DATA_ROOT/vm" "$DATA_ROOT/vm/images"
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# --- 3. repo + venv ----------------------------------------------------
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log "syncing repo into $INSTALL_ROOT"
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install -d -o "$SERVICE_USER" -g "$SERVICE_USER" -m 0755 "$INSTALL_ROOT"
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# The expected lab-host upgrade path is `cd /opt/cis490 && git pull &&
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# sudo ./scripts/install-lab-host.sh`, which means REPO_ROOT and
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# INSTALL_ROOT can be the same directory. cp -aT errors out in that
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# case ("are the same file") and `set -e` aborts before the systemd
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# units get installed and services restart, leaving the host running
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# whatever code was loaded at last service start.
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if [[ "$(readlink -f "$REPO_ROOT")" == "$(readlink -f "$INSTALL_ROOT")" ]]; then
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log "REPO_ROOT == INSTALL_ROOT ($INSTALL_ROOT); git pull already updated tree, skipping cp"
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else
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# Clean cp -aT to avoid an extra rsync dep.
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cp -aT "$REPO_ROOT" "$INSTALL_ROOT"
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fi
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chown -R "$SERVICE_USER":"$SERVICE_USER" "$INSTALL_ROOT"
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# Stamp a VERSION file at install time so episodes can record the
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# code commit they were generated by. /opt/cis490 is a flat copy
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# (no .git/), so we capture the source repo's HEAD here. Trainers
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# read meta.json.code_version to filter out episodes from buggy
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# pre-fix code.
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if VC="$(cd "$REPO_ROOT" && git rev-parse HEAD 2>/dev/null)"; then
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VB="$(cd "$REPO_ROOT" && git rev-parse --abbrev-ref HEAD 2>/dev/null || echo unknown)"
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VD="false"
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if cd "$REPO_ROOT" && [[ -n "$(git status --porcelain 2>/dev/null)" ]]; then
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VD="true"
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fi
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install -o "$SERVICE_USER" -g "$SERVICE_USER" -m 0644 /dev/stdin \
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"$INSTALL_ROOT/VERSION" <<EOF
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{"commit": "$VC", "branch": "$VB", "dirty": $VD, "installed_at_wall": "$(date -u +%Y-%m-%dT%H:%M:%SZ)"}
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EOF
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log "VERSION stamp: $VC ($VB)$([[ "$VD" == "true" ]] && echo " [dirty]")"
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else
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log "WARN: $REPO_ROOT not a git checkout; episodes will record code_version.commit='unknown'"
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fi
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log "building venv"
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if [[ "$USE_UV" -eq 1 ]]; then
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sudo -u "$SERVICE_USER" -- env HOME="$INSTALL_ROOT" \
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uv sync --project "$INSTALL_ROOT"
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else
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sudo -u "$SERVICE_USER" -- python3 -m venv "$INSTALL_ROOT/.venv"
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sudo -u "$SERVICE_USER" -- "$INSTALL_ROOT/.venv/bin/pip" install \
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--quiet --upgrade pip
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sudo -u "$SERVICE_USER" -- "$INSTALL_ROOT/.venv/bin/pip" install \
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--quiet starlette 'uvicorn[standard]' httpx msgpack
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fi
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# --- 4. systemd --------------------------------------------------------
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log "installing systemd units"
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install -m 0644 "$REPO_ROOT/etc/cis490-shipper.service" \
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/etc/systemd/system/cis490-shipper.service
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install -m 0644 "$REPO_ROOT/etc/cis490-orchestrator.service" \
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/etc/systemd/system/cis490-orchestrator.service
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# Auto-update: a 30-min timer that does git fetch + (if behind) pull
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# and re-run this script. Prevents host-falls-behind incidents when
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# the receiver's allow-list rolls forward and an on-device agent
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# fails to act on the 412 remediation. See AGENTS.md "Auto-update".
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install -m 0644 "$REPO_ROOT/etc/cis490-autoupdate.service" \
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/etc/systemd/system/cis490-autoupdate.service
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install -m 0644 "$REPO_ROOT/etc/cis490-autoupdate.timer" \
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/etc/systemd/system/cis490-autoupdate.timer
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# mTLS cert-fetch retry timer: handles the "operator edited host_id
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# but didn't re-run install" case AND the "bootstrap.wg was briefly
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# unreachable" case. Polls every 5 min; no-op once the cert is on
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# disk. See scripts/fetch-lab-host-cert.sh.
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install -m 0644 "$REPO_ROOT/etc/cis490-cert-fetch.service" \
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/etc/systemd/system/cis490-cert-fetch.service
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install -m 0644 "$REPO_ROOT/etc/cis490-cert-fetch.timer" \
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/etc/systemd/system/cis490-cert-fetch.timer
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systemctl daemon-reload
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# Enable timers immediately — the operator gets self-healing on the
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# next tick without an extra `systemctl enable`. Idempotent.
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systemctl enable --now cis490-autoupdate.timer 2>/dev/null || \
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log "WARN: could not enable cis490-autoupdate.timer (will retry next install)"
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systemctl enable --now cis490-cert-fetch.timer 2>/dev/null || \
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log "WARN: could not enable cis490-cert-fetch.timer (will retry next install)"
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# --- 5. config template (only on first install) -----------------------
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if [[ ! -f "$ETC_ROOT/lab-host.toml" ]]; then
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log "writing $ETC_ROOT/lab-host.toml (template)"
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install -m 0640 -o root -g "$SERVICE_USER" \
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"$REPO_ROOT/etc/lab-host.toml.example" "$ETC_ROOT/lab-host.toml"
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NEW_INSTALL=1
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else
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log "$ETC_ROOT/lab-host.toml exists; leaving in place"
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NEW_INSTALL=0
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fi
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# --- 6. orchestrator env file (read by cis490-orchestrator.service) ----
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ENV_FILE="$ETC_ROOT/lab-host.env"
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DEFAULT_HOST_ID="$(hostname -s)"
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if [[ ! -f "$ENV_FILE" ]]; then
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log "writing $ENV_FILE (host_id defaults to $DEFAULT_HOST_ID — edit if you want something else)"
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install -m 0640 -o root -g "$SERVICE_USER" /dev/stdin "$ENV_FILE" <<EOF
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# Read by cis490-orchestrator.service. Override per-host as needed.
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FLEET_HOST_ID=$DEFAULT_HOST_ID
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# BRIDGE=br-malware enables source 4 pcap capture AND unlocks the
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# Tier-3 modules whose payloads need callback (reverse/bind shells).
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# install-lab-host.sh provisions the bridge + tap pool below; leave
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# this on unless your lab host can't run NETLINK ops.
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BRIDGE=br-malware
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EOF
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fi
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# --- 6b. host-only bridge + per-slot tap pool --------------------------
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# br-malware lets pcap capture the guest traffic and lets bind/reverse
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# shell payloads route between guest and host. We pre-create a small
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# pool of taps so the launchers don't need sudo to attach interfaces;
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# each slot uses cis490tap{SLOT,SLOT+100} (Tier-2 demo + Tier-3
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# target). Idempotent: re-running on an already-set-up host is a
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# no-op.
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if command -v ip >/dev/null && [[ -x "$REPO_ROOT/vm/setup_bridge.sh" ]]; then
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if "$REPO_ROOT/vm/setup_bridge.sh" >/dev/null 2>&1; then
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log "bridge br-malware ready"
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for n in 0 1 2 3 4 5 6 7; do
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for prefix in cis490tap cis490target; do
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tap="${prefix}${n}"
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if ! ip link show "$tap" >/dev/null 2>&1; then
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ip tuntap add dev "$tap" mode tap user "$SERVICE_USER" 2>/dev/null || \
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ip tuntap add dev "$tap" mode tap 2>/dev/null || true
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ip link set "$tap" master br-malware 2>/dev/null || true
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ip link set "$tap" up 2>/dev/null || true
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fi
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done
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done
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log "tap pool: cis490tap0..7 + cis490target0..7 attached to br-malware"
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else
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log "WARN: setup_bridge.sh failed; BRIDGE mode will be unavailable"
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# Comment out BRIDGE in the env file — fleet will still run
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# Tier-2 + non-callback Tier-3 modules.
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sed -i 's/^BRIDGE=br-malware/# BRIDGE=br-malware # auto-disabled: bridge setup failed/' "$ENV_FILE"
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fi
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fi
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# --- 7. mTLS leaf cert (auto-fetch via bootstrap.wg) -------------------
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# One-shot fetch via the standalone script (also wired to a 5-min
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# retry timer in step 4 above, so this is just the install-time
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# kick-off — the timer handles transient failures and the case
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# where the operator edits host_id later).
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"$INSTALL_ROOT/scripts/fetch-lab-host-cert.sh" || \
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log "WARN: cert fetch failed — timer will retry"
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# --- 8. baseline VM image + cidata (best-effort) -----------------------
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ALPINE_IMG="$DATA_ROOT/vm/images/alpine-baseline.qcow2"
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CIDATA_ISO="$DATA_ROOT/vm/images/cidata.iso"
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if [[ ! -f "$ALPINE_IMG" ]]; then
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if "$REPO_ROOT/scripts/fetch-alpine-baseline.sh" "$ALPINE_IMG"; then
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log "fetched Alpine baseline -> $ALPINE_IMG"
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else
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log "WARN: Alpine baseline fetch failed; drop a qcow2 at $ALPINE_IMG manually"
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fi
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fi
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if [[ -f "$ALPINE_IMG" && ! -f "$CIDATA_ISO" ]]; then
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log "building cidata.iso (in-guest agent embedded)"
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sudo -u "$SERVICE_USER" -- "$INSTALL_ROOT/.venv/bin/python" \
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"$INSTALL_ROOT/tools/build_cidata.py" "$CIDATA_ISO" || \
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log "WARN: cidata build failed; run tools/build_cidata.py manually"
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fi
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# Symlink the canonical paths the launchers look at, when missing.
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install -d -o "$SERVICE_USER" -g "$SERVICE_USER" -m 0755 "$INSTALL_ROOT/vm/images"
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ln -sf "$ALPINE_IMG" "$INSTALL_ROOT/vm/images/alpine-baseline.qcow2" 2>/dev/null || true
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ln -sf "$CIDATA_ISO" "$INSTALL_ROOT/vm/images/cidata.iso" 2>/dev/null || true
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M2_IMG="$DATA_ROOT/vm/images/metasploitable2.qcow2"
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[[ -f "$M2_IMG" ]] && ln -sf "$M2_IMG" "$INSTALL_ROOT/vm/images/metasploitable2.qcow2" 2>/dev/null || true
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# --- 8. Tier-3 + Tier-4 deploy (auto, idempotent) ----------------------
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# Bring up msfrpcd + Metasploitable2 + bridge + verify. Skipped only if
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# certs aren't on disk yet (Tier-3 fire writes episodes that the
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# shipper ships, so it's pointless to run before mTLS is live) or the
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# operator passed --skip-tier3.
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SKIP_TIER3="${SKIP_TIER3:-}"
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for arg in "$@"; do
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[[ "$arg" == "--skip-tier3" ]] && SKIP_TIER3=1
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done
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if [[ -z "$SKIP_TIER3" && -f "$ETC_ROOT/certs/lab-host.pem" ]]; then
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log "deploying Tier 3 (msfrpcd + Metasploitable2 + bridge)"
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if "$INSTALL_ROOT/scripts/install-tier-3-4.sh"; then
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log "Tier-3 deploy ✓"
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else
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log "WARN: Tier-3 deploy failed — Tier 2 will keep running."
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log " Re-run later: sudo $INSTALL_ROOT/scripts/install-tier-3-4.sh"
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fi
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elif [[ -z "$SKIP_TIER3" ]]; then
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log "skipping Tier-3 deploy (no mTLS cert yet — re-run this script after"
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log "host_id is set so the cert auto-fetches first)"
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fi
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if [[ "$NEW_INSTALL" == "1" ]]; then
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log ""
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log "================================================================="
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log " FIRST-INSTALL NEXT STEPS "
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log "================================================================="
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log " 1. Edit $ETC_ROOT/lab-host.toml — set host_id and receiver URL."
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log " (host_id starts as 'REPLACE_ME'; the cert auto-fetch in"
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log " step 7 of this script SKIPS while that's still the value.)"
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log ""
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log " 2. RE-RUN THIS SCRIPT — sudo $0"
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log " The second pass sees the real host_id and pulls the leaf"
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log " cert from https://bootstrap.wg/v1/cert/<host_id>. There is"
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log " no manual cert-minting step on this host. DO NOT openssl."
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log ""
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log " 3. Confirm certs landed:"
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log " ls -l $ETC_ROOT/certs/"
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log " Expected: lab-host.pem, lab-host.key, wg-ca.pem"
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log ""
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log " 4. Run the diagnostic — every red row prints the exact fix:"
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log " $INSTALL_ROOT/.venv/bin/python \\"
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log " $INSTALL_ROOT/tools/cis490_doctor.py --role lab-host"
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log ""
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log " 5. Smoke-test the pipe (returns ok=true on success):"
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log " sudo -u $SERVICE_USER $INSTALL_ROOT/.venv/bin/python -m shipper \\"
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log " --config $ETC_ROOT/lab-host.toml --ping"
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log ""
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log " 6. Turn on the services — episodes start flowing immediately:"
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log " sudo systemctl enable --now cis490-shipper cis490-orchestrator"
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log ""
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log " If bootstrap.wg fetch fails (step 2 prints WARN), see AGENTS.md"
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log " ('Securing the connection (mTLS)') — almost always a missing"
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log " /etc/hosts entry or wg0 not up. Do not work around this by"
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log " minting certs locally; fix the WG path instead."
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log "================================================================="
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fi
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# --- 9. drain pre-stamp queue + restart services -----------------------
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# On a re-run (not first install), the running services are still
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# executing whatever code they loaded at last start, so the new module
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# objects we just dropped on disk don't take effect until restart. And
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# any episodes the orchestrator generated against pre-stamping code
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# are missing meta.json::code_version — the receiver returns 400 for
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# every PUT, the queue's fatal path didn't quarantine them in older
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# code, and the shipper burns cycles re-tarring them on every pass.
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# Drain them once, then restart so the new code reaches the live
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# daemon.
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if [[ "$NEW_INSTALL" != "1" ]]; then
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PY="$INSTALL_ROOT/.venv/bin/python"
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if [[ -x "$PY" && -f "$INSTALL_ROOT/tools/quarantine_unstamped.py" ]]; then
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log "draining pre-stamp episodes from queue (idempotent)"
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sudo -u "$SERVICE_USER" -- "$PY" \
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"$INSTALL_ROOT/tools/quarantine_unstamped.py" \
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--data-root "$DATA_ROOT/data" || \
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log "WARN: quarantine drain returned non-zero — see output above"
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fi
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systemctl daemon-reload
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for svc in cis490-shipper cis490-orchestrator; do
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if systemctl is-enabled --quiet "$svc" 2>/dev/null; then
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log "restarting $svc to pick up new code"
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systemctl restart "$svc" || \
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log "WARN: $svc restart failed — check 'journalctl -u $svc'"
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fi
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done
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fi
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log "lab-host install complete."
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log ""
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log "Cloning this repo and running the launchers manually is NOT enough."
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log "The lab-host role's data flow lives in the systemd services this"
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log "script just installed. If $INSTALL_ROOT/index.jsonl on the Pi stays"
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log "empty after step 5, run:"
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log " $INSTALL_ROOT/.venv/bin/python $INSTALL_ROOT/tools/cis490_doctor.py"
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