57bc88b9a7
Adds the Vault half of the factory-dev-box bringup, landed but not started (per the install-but-don't-start pattern used for nomad in #822): - lib/init/nomad/install.sh — now also installs vault from the shared HashiCorp apt repo. VAULT_VERSION pinned (1.18.5). Fast-path skips apt entirely when both binaries are at their pins; partial upgrades only touch the package that drifted. - nomad/vault.hcl — single-node config: file storage backend at /var/lib/vault/data, localhost listener on :8200, ui on, mlock kept on. No TLS / HA / audit yet; those land in later steps. - lib/init/nomad/systemd-vault.sh — writes /etc/systemd/system/vault.service (Type=notify, ExecStartPost auto-unseals from /etc/vault.d/unseal.key, CAP_IPC_LOCK granted for mlock), deploys nomad/vault.hcl to /etc/vault.d/, creates /var/lib/vault/data (0700 root), enables the unit without starting it. Idempotent via content-compare. - lib/init/nomad/vault-init.sh — first-run init: spawns a temporary `vault server` if not already reachable, runs operator-init with key-shares=1/threshold=1, persists unseal.key + root.token (0400 root), unseals once in-process, shuts down the temp server. Re-run detects initialized + unseal.key present → no-op. Initialized but key missing is a hard failure (can't recover). lib/hvault.sh already defaults VAULT_TOKEN to /etc/vault.d/root.token when the env var is absent, so no change needed there. Seal model: the single unseal key lives on disk; seal-key theft equals vault theft. Factory-dev-box-acceptable tradeoff — avoids running a second Vault to auto-unseal the first. Blocks S0.4 (#824). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
102 lines
4 KiB
Bash
Executable file
102 lines
4 KiB
Bash
Executable file
#!/usr/bin/env bash
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# =============================================================================
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# lib/init/nomad/systemd-nomad.sh — Idempotent systemd unit installer for Nomad
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#
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# Part of the Nomad+Vault migration (S0.2, issue #822). Writes
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# /etc/systemd/system/nomad.service pointing at /etc/nomad.d/ and runs
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# `systemctl enable nomad` WITHOUT starting the service — we don't launch
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# the cluster until S0.4 wires everything together.
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#
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# Idempotency contract:
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# - Existing unit file is NOT rewritten when on-disk content already
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# matches the desired content (avoids spurious `daemon-reload`).
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# - `systemctl enable` on an already-enabled unit is a no-op.
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# - This script is safe to run unconditionally before every factory boot.
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#
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# Preconditions:
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# - nomad binary installed (see lib/init/nomad/install.sh)
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# - /etc/nomad.d/ will hold server.hcl / client.hcl (placed by S0.4)
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#
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# Usage:
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# sudo lib/init/nomad/systemd-nomad.sh
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#
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# Exit codes:
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# 0 success (unit installed + enabled, or already so)
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# 1 precondition failure (not root, no systemctl, no nomad binary)
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# =============================================================================
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set -euo pipefail
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UNIT_PATH="/etc/systemd/system/nomad.service"
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NOMAD_CONFIG_DIR="/etc/nomad.d"
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NOMAD_DATA_DIR="/var/lib/nomad"
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log() { printf '[systemd-nomad] %s\n' "$*"; }
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die() { printf '[systemd-nomad] ERROR: %s\n' "$*" >&2; exit 1; }
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# shellcheck source=lib-systemd.sh
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. "$(dirname "${BASH_SOURCE[0]}")/lib-systemd.sh"
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# ── Preconditions ────────────────────────────────────────────────────────────
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systemd_require_preconditions "$UNIT_PATH"
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NOMAD_BIN="$(command -v nomad 2>/dev/null || true)"
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[ -n "$NOMAD_BIN" ] \
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|| die "nomad binary not found — run lib/init/nomad/install.sh first"
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# ── Desired unit content ─────────────────────────────────────────────────────
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# Upstream-recommended baseline (https://developer.hashicorp.com/nomad/docs/install/production/deployment-guide)
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# trimmed for a single-node combined server+client dev box.
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# - Wants=/After= network-online: nomad must have networking up.
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# - User/Group=root: the Docker driver needs root to talk to dockerd.
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# - LimitNOFILE/LimitNPROC=infinity: avoid Nomad's startup warning.
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# - KillSignal=SIGINT: triggers Nomad's graceful shutdown path.
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# - Restart=on-failure with a bounded burst to avoid crash-loops eating the
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# journal when /etc/nomad.d/ is mis-configured.
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read -r -d '' DESIRED_UNIT <<EOF || true
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[Unit]
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Description=Nomad
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Documentation=https://developer.hashicorp.com/nomad/docs
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Wants=network-online.target
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After=network-online.target
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# When Docker is present, ensure dockerd is up before nomad starts — the
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# Docker task driver needs the daemon socket available at startup.
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Wants=docker.service
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After=docker.service
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[Service]
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Type=notify
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User=root
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Group=root
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ExecReload=/bin/kill -HUP \$MAINPID
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ExecStart=${NOMAD_BIN} agent -config=${NOMAD_CONFIG_DIR}
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KillMode=process
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KillSignal=SIGINT
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LimitNOFILE=infinity
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LimitNPROC=infinity
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Restart=on-failure
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RestartSec=2
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StartLimitBurst=3
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StartLimitIntervalSec=10
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TasksMax=infinity
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OOMScoreAdjust=-1000
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[Install]
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WantedBy=multi-user.target
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EOF
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# ── Ensure config + data dirs exist ──────────────────────────────────────────
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# We do not populate /etc/nomad.d/ here (that's S0.4). We do create the
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# directory so `nomad agent -config=/etc/nomad.d` doesn't error if the unit
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# is started before hcl files are dropped in.
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for d in "$NOMAD_CONFIG_DIR" "$NOMAD_DATA_DIR"; do
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if [ ! -d "$d" ]; then
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log "creating ${d}"
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install -d -m 0755 "$d"
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fi
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done
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# ── Install + reload + enable (shared with systemd-vault.sh via lib-systemd) ─
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systemd_install_unit "$UNIT_PATH" "nomad.service" "$DESIRED_UNIT"
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log "done — unit installed and enabled (NOT started; S0.4 brings the cluster up)"
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