diff --git a/openbao/README.md b/openbao/README.md
new file mode 100644
index 0000000..f1aefa6
--- /dev/null
+++ b/openbao/README.md
@@ -0,0 +1,89 @@
+# OpenBao
+
+Automated installation and update script for an [OpenBao](https://openbao.org) secrets-manager
+server running inside an Alpine LXC on Proxmox.
+
+### Features
+
+Single script, automatic mode selection:
+
+| Context                                              | Action                                                                            |
+| ---------------------------------------------------- | --------------------------------------------------------------------------------- |
+| From Proxmox host, no existing OpenBao container     | Detects newest Alpine template, creates LXC, installs `bao` + OpenRC service      |
+| From Proxmox host, OpenBao container already present | Reuses the existing LXC, refreshes packages, upgrades `bao` to the latest release |
+| From inside an LXC, no `bao` binary                  | Installs OpenBao from scratch                                                     |
+| From inside an LXC, `bao` already present            | Updates the binary only (no config / data changes)                                |
+
+The container is identified by hostname **and** the `openbao` tag, so it is
+re-found across reruns even if the CTID was auto-allocated the first time.
+
+### Requirements
+
+- Proxmox VE host with `pveam`, `pct`, `pvesh`, `jq` available
+- Internet access from both the host (template download) and the LXC (binary download)
+- Script must be run as **root** on the Proxmox host (enforced; the Web UI shell qualifies)
+
+### Usage
+
+#### Full install (from Proxmox shell)
+
+```bash
+bash -c "$(curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/openbao/install.sh)"
+```
+
+Re-running the exact same command later upgrades packages inside the LXC and
+brings the `bao` binary to the latest release, without touching the config or
+the raft data directory.
+
+#### Customisation
+
+Every parameter is exposed as an environment variable:
+
+| Variable           | Default       | Description                                                   |
+| ------------------ | ------------- | ------------------------------------------------------------- |
+| `CTID`             | auto          | Container ID (auto-allocated via `pvesh get /cluster/nextid`) |
+| `OPENBAO_HOSTNAME` | `openbao`     | LXC hostname (also used as raft `node_id`)                    |
+| `TEMPLATE`         | auto-detected | Alpine template; auto-detected from `pveam available`         |
+| `STORAGE`          | `local-lvm`   | Proxmox storage for the LXC root disk                         |
+| `TEMPLATE_STORAGE` | `local`       | Storage where Alpine templates live                           |
+| `CORES`            | `2`           | vCPU cores                                                    |
+| `RAM`              | `1024`        | RAM in MiB                                                    |
+| `DISK`             | `8`           | Root disk size in GB                                          |
+| `BRIDGE`           | `vmbr0`       | Network bridge                                                |
+| `LXC_TAG`          | `openbao`     | Stable tag used to re-discover the container                  |
+| `OPENBAO_VERSION`  | `latest`      | Pin a specific release (e.g. `v2.0.3`) or `latest`            |
+
+```bash
+CTID=210 OPENBAO_HOSTNAME=vault CORES=4 RAM=2048 \
+  bash -c "$(curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/feat/lxc-OpenBao/openbao/install.sh)"
+```
+
+#### First-time initialisation
+
+OpenBao starts sealed. Once the LXC is up:
+
+```bash
+pct enter <CTID>
+export VAULT_ADDR=http://127.0.0.1:8200
+bao operator init        # save the unseal keys + root token somewhere safe
+bao operator unseal      # repeat with each key share until unsealed
+```
+
+#### Update (from inside the LXC)
+
+```bash
+curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/feat/lxc-OpenBao/openbao/install.sh | bash
+```
+
+The script auto-detects the presence of `/usr/local/bin/bao` and switches to
+update mode. The OpenRC service is stopped, the binary is swapped (the old one
+is kept as `bao.bak.<ts>`), then the service is restarted.
+
+### Architecture
+
+- **OS**: latest Alpine LXC template (auto-detected), unprivileged, `nesting=1`
+- **Binary**: official `bao` release from `github.com/openbao/openbao`, installed in `/usr/local/bin`
+- **Service**: OpenRC, runs as user `openbao`, logs to `/var/log/openbao.log` (rotated daily, 7 days retained)
+- **Config**: `/etc/openbao/config.hcl` — raft storage, TLS disabled (terminate TLS at the reverse proxy), `disable_mlock = true` for unprivileged LXC
+- **Data**: `/var/lib/openbao/data` (raft)
+- **Version tracking**: `/opt/openbao_version.txt` records the currently installed tag for idempotent reruns
diff --git a/openbao/install.sh b/openbao/install.sh
new file mode 100755
index 0000000..2350c03
--- /dev/null
+++ b/openbao/install.sh
@@ -0,0 +1,452 @@
+#!/bin/bash
+# install.sh - OpenBao: LXC creation, installation & update
+# Usage:
+#   From Proxmox host : bash -c "$(curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/feat/lxc-OpenBao/openbao/install.sh)"
+#   From inside LXC   : bash /root/install.sh           (updates bao binary)
+#
+# Single entrypoint, three automatic modes:
+#   1. Proxmox host, no existing container  -> create LXC + install OpenBao
+#   2. Proxmox host, container already present -> update packages + upgrade bao
+#   3. Inside an LXC                         -> install bao if missing, otherwise update
+#
+# The OpenBao binary install/upgrade logic lives in a single reusable function
+# (install_or_upgrade_bao) shared by both the create and update paths.
+
+set -euo pipefail
+
+# --- Config (override via environment) ---
+CTID="${CTID:-}"
+HOSTNAME_LXC="${OPENBAO_HOSTNAME:-openbao}"
+TEMPLATE="${TEMPLATE:-}"                          # auto-detected when empty
+STORAGE="${STORAGE:-local-lvm}"
+TEMPLATE_STORAGE="${TEMPLATE_STORAGE:-local}"
+CORES="${CORES:-2}"
+RAM="${RAM:-1024}"
+DISK="${DISK:-8}"
+BRIDGE="${BRIDGE:-vmbr0}"
+LXC_TAG="${LXC_TAG:-openbao}"                     # stable identifier for the container
+OPENBAO_VERSION="${OPENBAO_VERSION:-latest}"      # "latest" or e.g. "v2.0.3"
+OPENBAO_API="https://api.github.com/repos/openbao/openbao/releases"
+SCRIPT_URL="https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/feat/lxc-OpenBao/openbao/install.sh"
+VERSION_FILE="/opt/openbao_version.txt"
+BAO_USER="openbao"
+BAO_CONFIG_DIR="/etc/openbao"
+BAO_DATA_DIR="/var/lib/openbao"
+
+# --- Colors ---
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+log_info()  { echo -e "${GREEN}[INFO]${NC} $1"; }
+log_warn()  { echo -e "${YELLOW}[WARN]${NC} $1"; }
+log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
+
+# ============================================================
+# Generic helpers
+# ============================================================
+require_root() {
+  if [[ "$(id -u)" -ne 0 ]]; then
+    log_error "This script must be run as root (current uid: $(id -u))."
+    log_error "On Proxmox, launch it from the host shell or via the Web UI shell, both of which run as root."
+    exit 1
+  fi
+}
+
+get_arch() {
+  case "$(uname -m)" in
+    x86_64)  echo "amd64" ;;
+    aarch64) echo "arm64" ;;
+    *)       log_error "Unsupported architecture: $(uname -m)"; exit 1 ;;
+  esac
+}
+
+# Resolve "latest" -> concrete tag name, otherwise echo input unchanged.
+resolve_openbao_version() {
+  local requested="$1"
+  if [[ "$requested" != "latest" ]]; then
+    echo "$requested"
+    return 0
+  fi
+  local tag
+  tag=$(curl -fsSL "${OPENBAO_API}/latest" | jq -r '.tag_name')
+  if [[ -z "$tag" || "$tag" == "null" ]]; then
+    log_error "Failed to resolve latest OpenBao release from GitHub API."
+    exit 1
+  fi
+  echo "$tag"
+}
+
+# ============================================================
+# Reusable: install or upgrade the bao binary in-place.
+# Used by both fresh-install and update flows.
+# Returns 0 on success, exits on hard error.
+# ============================================================
+install_or_upgrade_bao() {
+  local tag arch version url tmpdir current
+  tag=$(resolve_openbao_version "$OPENBAO_VERSION")
+  arch=$(get_arch)
+  version="${tag#v}"
+
+  current=""
+  if [[ -f "$VERSION_FILE" ]]; then
+    current=$(cat "$VERSION_FILE")
+  fi
+
+  if [[ "$current" == "$tag" && -x /usr/local/bin/bao ]]; then
+    log_info "OpenBao already at $tag, nothing to do."
+    return 0
+  fi
+
+  # OpenBao publishes zip archives named bao_<version>_linux_<arch>.zip
+  url="https://github.com/openbao/openbao/releases/download/${tag}/bao_${version}_linux_${arch}.zip"
+  log_info "Downloading OpenBao ${tag} (${arch}) from ${url}..."
+
+  tmpdir=$(mktemp -d)
+  trap 'rm -rf "$tmpdir"' RETURN
+  curl -fsSL "$url" -o "${tmpdir}/bao.zip"
+  unzip -q -o "${tmpdir}/bao.zip" -d "$tmpdir"
+
+  if [[ ! -f "${tmpdir}/bao" ]]; then
+    log_error "Archive did not contain expected 'bao' binary."
+    exit 1
+  fi
+
+  # Stop service if running, swap binary atomically, then restart.
+  local service_was_running=0
+  if command -v rc-service >/dev/null 2>&1 && rc-service openbao status >/dev/null 2>&1; then
+    service_was_running=1
+    log_info "Stopping openbao service for upgrade..."
+    rc-service openbao stop || true
+  fi
+
+  if [[ -x /usr/local/bin/bao ]]; then
+    cp /usr/local/bin/bao "/usr/local/bin/bao.bak.$(date +%s)"
+  fi
+  install -m 0755 "${tmpdir}/bao" /usr/local/bin/bao
+  ln -sf /usr/local/bin/bao /usr/bin/bao
+  echo "$tag" > "$VERSION_FILE"
+
+  log_info "Installed: $(/usr/local/bin/bao --version 2>&1 | head -n1 || true)"
+
+  if [[ "$service_was_running" -eq 1 ]]; then
+    log_info "Restarting openbao service..."
+    rc-service openbao start
+  fi
+}
+
+# ============================================================
+# Proxmox-host helpers
+# ============================================================
+
+# Detect newest Alpine LXC template available from the Proxmox repos.
+detect_latest_alpine_template() {
+  local tmpl
+  tmpl=$(pveam available --section system 2>/dev/null \
+    | awk '/^system[[:space:]]+alpine-/ {print $2}' \
+    | sort -V \
+    | tail -n1)
+
+  if [[ -z "$tmpl" ]]; then
+    log_warn "Could not query pveam; falling back to a known-good Alpine template."
+    tmpl="alpine-3.22-default_20250617_amd64.tar.xz"
+  fi
+  log_info "Selected Alpine template: $tmpl"
+  echo "$tmpl"
+}
+
+# Find an existing LXC by tag or hostname. Echoes CTID, returns 1 if none.
+find_existing_lxc() {
+  local id host tags
+  while read -r id _; do
+    [[ -z "$id" || "$id" == "VMID" ]] && continue
+    host=$(pct config "$id" 2>/dev/null | awk -F': ' '/^hostname:/ {print $2}' || true)
+    tags=$(pct config "$id" 2>/dev/null | awk -F': ' '/^tags:/ {print $2}' || true)
+    if [[ "$host" == "$HOSTNAME_LXC" ]] || [[ ",${tags//;/,}," == *",${LXC_TAG},"* ]]; then
+      echo "$id"
+      return 0
+    fi
+  done < <(pct list | awk 'NR>1 {print $1}')
+  return 1
+}
+
+ensure_template_present() {
+  local tmpl="$1"
+  if ! pveam list "$TEMPLATE_STORAGE" 2>/dev/null | grep -q "$tmpl"; then
+    log_info "Downloading template ${tmpl} to storage ${TEMPLATE_STORAGE}..."
+    pveam update >/dev/null
+    pveam download "$TEMPLATE_STORAGE" "$tmpl"
+  else
+    log_info "Template ${tmpl} already present on ${TEMPLATE_STORAGE}."
+  fi
+}
+
+# Pick next available CTID if user did not provide one.
+allocate_ctid() {
+  pvesh get /cluster/nextid 2>/dev/null \
+    || pvesh get /cluster/resources --type vm --output-format json 2>/dev/null \
+       | jq '[.[].vmid] | max + 1' \
+    || echo 100
+}
+
+# Inject the script into the container and execute it in the requested mode.
+exec_in_lxc() {
+  local ctid="$1"
+  local mode="$2"   # --install or --update
+
+  # Ensure base tooling exists inside the container before piping the script.
+  pct exec "$ctid" -- sh -c "apk add --no-cache bash curl jq unzip ca-certificates >/dev/null 2>&1"
+  curl -fsSL "$SCRIPT_URL" | pct exec "$ctid" -- bash -s -- "$mode"
+}
+
+# ============================================================
+# MODE: Proxmox host — create LXC + install
+# ============================================================
+create_lxc() {
+  log_info "=== OpenBao — LXC creation ==="
+
+  if [[ -z "$TEMPLATE" ]]; then
+    TEMPLATE=$(detect_latest_alpine_template)
+  else
+    log_info "Using user-provided template: $TEMPLATE"
+  fi
+  ensure_template_present "$TEMPLATE"
+
+  if [[ -z "$CTID" ]]; then
+    CTID=$(allocate_ctid)
+    log_info "Auto-selected CTID: $CTID"
+  fi
+
+  log_info "Creating LXC ${CTID} (${HOSTNAME_LXC})..."
+  pct create "$CTID" "${TEMPLATE_STORAGE}:vztmpl/${TEMPLATE}" \
+    --hostname "$HOSTNAME_LXC" \
+    --cores "$CORES" \
+    --memory "$RAM" \
+    --rootfs "${STORAGE}:${DISK}" \
+    --net0 "name=eth0,bridge=${BRIDGE},ip=dhcp" \
+    --unprivileged 1 \
+    --features "nesting=1" \
+    --tags "infra-script,${LXC_TAG}" \
+    --onboot 1 \
+    --start 0
+
+  log_info "Starting LXC ${CTID}..."
+  pct start "$CTID"
+  # Wait for network to come up
+  local tries=0
+  until pct exec "$CTID" -- sh -c "ip -4 addr show eth0 | grep -q 'inet '" 2>/dev/null; do
+    tries=$((tries + 1))
+    if (( tries > 20 )); then
+      log_error "LXC ${CTID} did not acquire an IP after 20s."
+      exit 1
+    fi
+    sleep 1
+  done
+
+  log_info "Running installer inside LXC ${CTID}..."
+  exec_in_lxc "$CTID" "--install"
+
+  local ip
+  ip=$(pct exec "$CTID" -- ip -4 addr show eth0 2>/dev/null | awk '/inet /{print $2}' | cut -d/ -f1 || true)
+
+  echo ""
+  log_info "========================================="
+  log_info "LXC ${CTID} created successfully!"
+  log_info "========================================="
+  echo ""
+  echo "  Hostname : ${HOSTNAME_LXC}"
+  echo "  IP       : ${ip:-pending}"
+  echo "  API      : http://${ip:-<ip>}:8200"
+  echo ""
+  echo "Next steps:"
+  echo "  pct enter ${CTID}"
+  echo "  export VAULT_ADDR=http://127.0.0.1:8200"
+  echo "  bao operator init        # initialise & retrieve unseal keys + root token"
+  echo "  bao operator unseal      # repeat with the unseal keys"
+  echo ""
+}
+
+# ============================================================
+# MODE: Proxmox host — update existing LXC
+# ============================================================
+update_lxc() {
+  local ctid="$1"
+  log_info "=== OpenBao — updating existing LXC ${ctid} ==="
+
+  if ! pct status "$ctid" | grep -q running; then
+    log_info "Starting LXC ${ctid}..."
+    pct start "$ctid"
+    sleep 3
+  fi
+
+  log_info "Refreshing Alpine packages inside LXC ${ctid}..."
+  pct exec "$ctid" -- sh -c "apk update >/dev/null && apk upgrade >/dev/null"
+
+  log_info "Upgrading bao binary inside LXC ${ctid}..."
+  exec_in_lxc "$ctid" "--update"
+
+  log_info "Update of LXC ${ctid} complete."
+}
+
+# ============================================================
+# MODE: inside LXC — fresh install of OpenBao
+# ============================================================
+install_inside_lxc() {
+  log_info "=== OpenBao — installation ==="
+
+  log_info "Updating package index..."
+  apk update >/dev/null
+  apk upgrade >/dev/null
+
+  log_info "Installing dependencies..."
+  # gcompat: OpenBao binaries are glibc-built; gcompat is required on musl Alpine.
+  apk add --no-cache bash curl jq unzip ca-certificates gcompat openrc logrotate >/dev/null
+
+  install_or_upgrade_bao
+
+  log_info "Creating ${BAO_USER} system user..."
+  if ! id "$BAO_USER" >/dev/null 2>&1; then
+    addgroup -S "$BAO_USER" 2>/dev/null || true
+    adduser -S -D -H -h "$BAO_DATA_DIR" -s /sbin/nologin -G "$BAO_USER" "$BAO_USER"
+  fi
+
+  log_info "Provisioning directories..."
+  mkdir -p "$BAO_CONFIG_DIR" "$BAO_DATA_DIR/data"
+  chown -R "${BAO_USER}:${BAO_USER}" "$BAO_DATA_DIR"
+  chmod 750 "$BAO_DATA_DIR"
+
+  if [[ ! -f "${BAO_CONFIG_DIR}/config.hcl" ]]; then
+    log_info "Writing default ${BAO_CONFIG_DIR}/config.hcl..."
+    cat > "${BAO_CONFIG_DIR}/config.hcl" <<EOF
+ui            = true
+disable_mlock = true
+
+storage "raft" {
+  path    = "${BAO_DATA_DIR}/data"
+  node_id = "${HOSTNAME_LXC}"
+}
+
+listener "tcp" {
+  address     = "0.0.0.0:8200"
+  tls_disable = 1
+}
+
+api_addr     = "http://0.0.0.0:8200"
+cluster_addr = "http://0.0.0.0:8201"
+EOF
+    chown root:"$BAO_USER" "${BAO_CONFIG_DIR}/config.hcl"
+    chmod 640 "${BAO_CONFIG_DIR}/config.hcl"
+  else
+    log_info "Existing ${BAO_CONFIG_DIR}/config.hcl preserved."
+  fi
+
+  log_info "Installing OpenRC service..."
+  cat > /etc/init.d/openbao <<'EOF'
+#!/sbin/openrc-run
+
+name="OpenBao"
+description="OpenBao secrets manager"
+command="/usr/local/bin/bao"
+command_args="server -config=/etc/openbao/config.hcl"
+command_user="openbao:openbao"
+command_background=true
+pidfile="/run/${RC_SVCNAME}.pid"
+directory="/var/lib/openbao"
+
+output_log="/var/log/openbao.log"
+error_log="/var/log/openbao.log"
+
+depend() {
+    need net
+    after net
+}
+
+start_pre() {
+    checkpath --directory --owner openbao:openbao --mode 0750 /var/lib/openbao
+    checkpath --directory --owner openbao:openbao --mode 0750 /var/lib/openbao/data
+    checkpath --file      --owner openbao:openbao --mode 0644 /var/log/openbao.log
+}
+EOF
+  chmod +x /etc/init.d/openbao
+  rc-update add openbao default >/dev/null
+
+  cat > /etc/logrotate.d/openbao <<'EOF'
+/var/log/openbao.log {
+    daily
+    rotate 7
+    compress
+    missingok
+    notifempty
+    copytruncate
+}
+EOF
+  ln -sf /usr/sbin/logrotate /etc/periodic/daily/logrotate 2>/dev/null || true
+
+  log_info "Starting openbao service..."
+  rc-service openbao start || log_warn "openbao failed to start — inspect /var/log/openbao.log"
+
+  log_info "Cleaning up..."
+  rm -rf /var/cache/apk/*
+
+  echo ""
+  log_info "========================================="
+  log_info "OpenBao installation complete!"
+  log_info "========================================="
+  echo ""
+  echo "Initialise the server with:"
+  echo "  export VAULT_ADDR=http://127.0.0.1:8200"
+  echo "  bao operator init"
+  echo "  bao operator unseal   # repeat with each unseal key share"
+  echo ""
+}
+
+# ============================================================
+# MODE: inside LXC — update only
+# ============================================================
+update_inside_lxc() {
+  log_info "=== OpenBao — update ==="
+  apk update >/dev/null
+  apk upgrade >/dev/null
+  install_or_upgrade_bao
+  log_info "Update complete."
+}
+
+# ============================================================
+# Main — dispatch on explicit mode flag or auto-detect context
+# ============================================================
+main() {
+  case "${1:-}" in
+    --install)
+      install_inside_lxc
+      return
+      ;;
+    --update)
+      update_inside_lxc
+      return
+      ;;
+  esac
+
+  if command -v pct >/dev/null 2>&1; then
+    # Running on a Proxmox host
+    require_root
+
+    local existing=""
+    if existing=$(find_existing_lxc); then
+      log_info "Found existing OpenBao LXC (CTID ${existing}, hostname/tag match) — switching to update mode."
+      update_lxc "$existing"
+    else
+      create_lxc
+    fi
+  else
+    # Inside a container (no Proxmox tooling)
+    require_root
+    if [[ -x /usr/local/bin/bao ]]; then
+      update_inside_lxc
+    else
+      install_inside_lxc
+    fi
+  fi
+}
+
+main "$@"