dizyaka / Zabbix agent installer

#!/bin/sh # zbx-agent2-bootstrap.sh # Installs and configures Zabbix Agent2 on Debian/Ubuntu with ACTIVE checks (no inbound port needed). # Usage: # sudo sh zbx-agent2-bootstrap.sh --server 192.168.1.10 [--branch 7.0] [--hostname myvm] [--metadata "linux,docker"] [--docker] set -eu SERVER="" BRANCH="7.0" HOSTNAME_OVERRIDE="" METADATA="linux" ENABLE_DOCKER=0 die() { echo "ERROR: $*" >&2; exit 1; } while [ $# -gt 0 ]; do case "$1" in --server) SERVER="${2:-}"; shift 2 ;; --branch) BRANCH="${2:-}"; shift 2 ;; --hostname) HOSTNAME_OVERRIDE="${2:-}"; shift 2 ;; --metadata) METADATA="${2:-}"; shift 2 ;; --docker) ENABLE_DOCKER=1; shift 1 ;; -h|--help) cat <<EOF Usage: sudo sh $0 --server <zabbix_server_ip_or_dns> [options] Options: --branch <7.0|6.0|6.4> Zabbix repo branch (default: 7.0) --hostname <name> Hostname shown in Zabbix (default: system hostname) --metadata <string> HostMetadata for auto-registration (default: linux) --docker Add user 'zabbix' to docker group (optional) EOF exit 0 ;; *) die "Unknown argument: $1" ;; esac done [ -n "$SERVER" ] || die "--server is required" # Must be root if [ "$(id -u)" != "0" ]; then die "Run as root (use sudo)" fi # Detect OS [ -r /etc/os-release ] || die "/etc/os-release not found" # shellcheck disable=SC1091 . /etc/os-release CODENAME="${VERSION_CODENAME:-}" [ -n "$CODENAME" ] || die "VERSION_CODENAME is empty (unsupported OS?)" case "${ID:-}" in debian) REPO_BASE="https://repo.zabbix.com/zabbix/${BRANCH}/debian" ;; ubuntu) REPO_BASE="https://repo.zabbix.com/zabbix/${BRANCH}/ubuntu" ;; *) echo "${ID_LIKE:-}" | grep -qi debian || die "Only Debian/Ubuntu are supported (ID=${ID:-unknown})" REPO_BASE="https://repo.zabbix.com/zabbix/${BRANCH}/debian" ;; esac # Determine hostname for Zabbix if [ -n "$HOSTNAME_OVERRIDE" ]; then ZBX_HOSTNAME="$HOSTNAME_OVERRIDE" else ZBX_HOSTNAME="$(hostname -s 2>/dev/null || hostname || echo "unknown-host")" fi echo "[*] Installing prerequisites..." export DEBIAN_FRONTEND=noninteractive apt-get update -y apt-get install -y --no-install-recommends ca-certificates curl gnupg echo "[*] Adding Zabbix repo key..." install -d -m 0755 /usr/share/keyrings curl -fsSL "https://repo.zabbix.com/zabbix-official-repo.key" | gpg --dearmor -o /usr/share/keyrings/zabbix.gpg echo "[*] Adding Zabbix repo list..." cat >/etc/apt/sources.list.d/zabbix.list <<EOF deb [signed-by=/usr/share/keyrings/zabbix.gpg] ${REPO_BASE} ${CODENAME} main EOF apt-get update -y echo "[*] Installing zabbix-agent2..." apt-get install -y zabbix-agent2 echo "[*] Writing Agent2 config (active-only)..." install -d -m 0755 /etc/zabbix/zabbix_agent2.d cat >/etc/zabbix/zabbix_agent2.d/99-bootstrap.conf <<EOF ### Managed by zbx-agent2-bootstrap.sh Server=${SERVER} ServerActive=${SERVER} Hostname=${ZBX_HOSTNAME} HostMetadata=${METADATA} EOF echo "[*] Enabling and restarting zabbix-agent2..." systemctl enable --now zabbix-agent2 systemctl restart zabbix-agent2 if [ "$ENABLE_DOCKER" -eq 1 ]; then if getent group docker >/dev/null 2>&1; then echo "[*] Adding user 'zabbix' to docker group..." usermod -aG docker zabbix || true echo "[!] NOTE: docker.sock access is powerful. Prefer docker-socket-proxy if you want safer Docker monitoring." else echo "[!] docker group not found; skipping --docker" fi fi echo "[*] Agent status (first lines):" systemctl --no-pager --full status zabbix-agent2 | sed -n '1,12p' echo echo "[OK] Installed and configured Zabbix Agent2 (active-only)." echo " Hostname: ${ZBX_HOSTNAME}" echo " ServerActive: ${SERVER}" echo " HostMetadata: ${METADATA}" echo echo "Next step on Zabbix Server: create an Autoregistration Action that matches HostMetadata='${METADATA}'" echo "and links the appropriate template (e.g., 'Linux by Zabbix agent active')."