siujamo
ece2af988b
- Add S3_ADDRESSING_STYLE env var for S3-compatible endpoints - Set addressing style and region via aws configure set - Region now persists in aws config rather than process env var
127 lines
4.1 KiB
Bash
127 lines
4.1 KiB
Bash
#!/usr/bin/env bash
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#
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# Caddy Installation for Debian/Ubuntu
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# Downloads the Caddy binary (from a local file or S3-compatible storage),
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# creates the caddy:caddy system user and group, installs the binary with
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# cap_net_bind_service, prepares the config directory and registers the
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# systemd unit. The service itself is started by prepare-caddy-cicd.sh once
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# the site Caddyfile and web root exist.
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#
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set -euo pipefail
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# S3 and binary environment variables (with fallback defaults)
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S3_ENDPOINT="${S3_ENDPOINT:-}"
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S3_BUCKET="${S3_BUCKET:-}"
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S3_REGION="${S3_REGION:-us-east-1}"
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S3_ACCESS_KEY="${S3_ACCESS_KEY:-}"
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S3_SECRET_KEY="${S3_SECRET_KEY:-}"
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BIN_URI="${BIN_URI:-caddy-custom-linux-amd64}"
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# S3 addressing style: 'virtual' (default), 'path', or 'auto'
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S3_ADDRESSING_STYLE="${S3_ADDRESSING_STYLE:-virtual}"
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BIN_SOURCE="./${BIN_URI}"
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BIN_DEST="/usr/local/bin/caddy"
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CADDY_CONF_DIR="/etc/caddy"
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CADDY_DATA_DIR="/var/lib/caddy"
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# Ensure script is executed with root privileges
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if [ "$(id -u)" -ne 0 ]; then
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echo "Error: This script must be run as root." >&2
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exit 1
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fi
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echo "==> [1/5] Resolving Caddy binary..."
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if [ ! -f "${BIN_SOURCE}" ]; then
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if [ -n "${S3_BUCKET}" ]; then
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echo "Local binary '${BIN_SOURCE}' not found. Downloading from S3 bucket '${S3_BUCKET}'..."
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# Configure addressing style and region
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aws configure set default.s3.addressing_style "${S3_ADDRESSING_STYLE}"
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aws configure set default.region "${S3_REGION}"
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export AWS_ACCESS_KEY_ID="${S3_ACCESS_KEY}"
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export AWS_SECRET_ACCESS_KEY="${S3_SECRET_KEY}"
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AWS_CMD_ARGS=()
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if [ -n "${S3_ENDPOINT}" ]; then
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AWS_CMD_ARGS+=(--endpoint-url "${S3_ENDPOINT}")
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fi
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aws s3 cp "s3://${S3_BUCKET}/${BIN_URI}" "${BIN_SOURCE}" "${AWS_CMD_ARGS[@]}"
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echo "Successfully downloaded '${BIN_URI}' from S3."
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else
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echo "Error: Local binary '${BIN_SOURCE}' not found, and S3_BUCKET is empty. Cannot continue." >&2
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exit 1
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fi
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else
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echo "Found local binary at '${BIN_SOURCE}', skipping S3 download."
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fi
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echo "==> [2/5] Creating caddy system user and group..."
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# Create caddy system user and group (no login shell, dedicated home)
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if ! getent group caddy >/dev/null 2>&1; then
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groupadd --system caddy
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fi
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if ! id -u caddy >/dev/null 2>&1; then
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useradd --system \
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--gid caddy \
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--create-home \
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--home-dir "${CADDY_DATA_DIR}" \
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--shell /usr/sbin/nologin \
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--comment "Caddy web server" \
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caddy
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fi
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echo "==> [3/5] Installing Caddy binary and granting capabilities..."
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install -m 750 -o root -g caddy "${BIN_SOURCE}" "${BIN_DEST}"
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# Grant capability to bind to privileged ports (<1024) without running as root
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setcap 'cap_net_bind_service=+ep' "${BIN_DEST}"
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echo "==> [4/5] Preparing config directory (${CADDY_CONF_DIR})..."
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mkdir -p "${CADDY_CONF_DIR}"
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chown root:caddy "${CADDY_CONF_DIR}"
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chmod 755 "${CADDY_CONF_DIR}"
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echo "==> [5/5] Registering systemd service..."
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# The unit is only registered here; prepare-caddy-cicd.sh starts it once the
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# site Caddyfile and web root are in place.
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cat <<'EOF' > /etc/systemd/system/caddy.service
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[Unit]
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Description=Caddy
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Documentation=https://caddyserver.com/docs/
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After=network.target network-online.target
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Requires=network-online.target
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[Service]
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Type=notify
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User=caddy
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Group=caddy
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ExecStart=/usr/local/bin/caddy run --environ --config /etc/caddy/Caddyfile
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ExecReload=/usr/local/bin/caddy reload --config /etc/caddy/Caddyfile --force
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TimeoutStopSec=5s
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LimitNOFILE=1048576
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LimitNPROC=512
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PrivateTmp=true
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ProtectSystem=full
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AmbientCapabilities=CAP_NET_BIND_SERVICE
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CapabilityBoundingSet=CAP_NET_BIND_SERVICE
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload
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echo "========================================================="
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echo " Caddy installation finished successfully!"
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echo " - Binary: ${BIN_DEST} (Capabilities: cap_net_bind_service)"
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echo " - User/Group: caddy:caddy"
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echo " - Config dir: ${CADDY_CONF_DIR}"
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echo " - Service registered but not yet started."
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echo " - Next: run prepare-caddy-cicd.sh to create the site config"
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echo " and web root, then start Caddy."
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echo "========================================================="
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