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dropshell/source/agent-remote/ds_install.sh
j bf34bbbd8d
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feat: Move install lifecycle to single remote script (ds_install.sh)
2026-03-21 21:21:55 +13:00

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#!/bin/bash
set -euo pipefail
# ds_install.sh SERVICE
#
# Handles the full install lifecycle on the remote server in a single SSH session.
# Called after the local dropshell has rsynced new template + config to a staging folder.
#
# Remote directory layout:
# services/SERVICE/config/ ← live service config
# services/SERVICE/template/ ← live template scripts
# services/SERVICE/_staging/config/ ← new config (rsynced by local)
# services/SERVICE/_staging/template/ ← new template (rsynced by local)
#
# Flow:
# 1. Run install-pre.sh from STAGING (new code + new config) → validate
# 2. Run uninstall.sh from LIVE (old code + old config) → stop old service
# 3. Swap staging → live (atomic replacement)
# 4. Run install.sh from LIVE (now the new version)
#
# If any step fails, the script exits immediately (set -e).
# If install-pre.sh fails, the old service is untouched.
# -- Determine paths --
SCRIPT_PATH="$(readlink -f "${BASH_SOURCE[0]}")"
AGENT_PATH="$(dirname "${SCRIPT_PATH}")"
DROPSHELL_DIR="$(dirname "${AGENT_PATH}")"
# Export for scripts that need them
export AGENT_PATH
export DROPSHELL_DIR
# -- Source common functions --
source "${AGENT_PATH}/common.sh"
# -- Validate arguments --
if [[ $# -lt 1 ]]; then
echo "Usage: ds_install.sh SERVICE [TEMP_DIR]" >&2
exit 1
fi
SERVICE="$1"
export SERVICE
export TEMP_DIR="${2:-}"
export DOCKER_CLI_HINTS=false
SERVICE_DIR="${DROPSHELL_DIR}/services/${SERVICE}"
LIVE_CONFIG="${SERVICE_DIR}/config"
LIVE_TEMPLATE="${SERVICE_DIR}/template"
STAGING_DIR="${SERVICE_DIR}/_staging"
STAGING_CONFIG="${STAGING_DIR}/config"
STAGING_TEMPLATE="${STAGING_DIR}/template"
# -- Validate staging exists --
[[ -d "${STAGING_CONFIG}" ]] || _die "Staging config not found at ${STAGING_CONFIG}"
[[ -d "${STAGING_TEMPLATE}" ]] || _die "Staging template not found at ${STAGING_TEMPLATE}"
[[ -f "${DROPSHELL_DIR}/server_info.env" ]] || _die "Missing server_info.env"
# -- Helper: source env for a given template/config pair --
load_env() {
local template_dir="$1"
local config_dir="$2"
# Find template_info.env
local tinfo="${template_dir}/template_info.env"
if [[ ! -f "${tinfo}" ]]; then
tinfo="${template_dir}/config/.template_info.env"
fi
[[ -f "${tinfo}" ]] || _die "Missing template_info.env in ${template_dir}"
# Must have service.env
[[ -f "${config_dir}/service.env" ]] || _die "Missing service.env in ${config_dir}"
# Source in order: server_info → template_info → service.env
set -a
source "${DROPSHELL_DIR}/server_info.env"
source "${tinfo}"
source "${config_dir}/service.env"
set +a
export CONFIG_PATH="${config_dir}"
export TEMPLATE_PATH="${template_dir}"
}
# ═══════════════════════════════════════════════════════════════════
# STEP 1: Run install-pre.sh from STAGING (new code + new config)
# ═══════════════════════════════════════════════════════════════════
if [[ -f "${STAGING_TEMPLATE}/install-pre.sh" ]]; then
echo "── Step 1: Running install-pre.sh (new version) ──"
load_env "${STAGING_TEMPLATE}" "${STAGING_CONFIG}"
cd "${STAGING_TEMPLATE}"
if ! bash ./install-pre.sh; then
echo "install-pre.sh failed — aborting install. Old service is untouched."
rm -rf "${STAGING_DIR}"
exit 1
fi
else
echo "── Step 1: No install-pre.sh — skipping ──"
fi
# ═══════════════════════════════════════════════════════════════════
# STEP 2: Run uninstall.sh from LIVE (old code + old config)
# ═══════════════════════════════════════════════════════════════════
if [[ -d "${LIVE_TEMPLATE}" ]] && [[ -f "${LIVE_TEMPLATE}/uninstall.sh" ]]; then
echo "── Step 2: Running uninstall.sh (old version) ──"
load_env "${LIVE_TEMPLATE}" "${LIVE_CONFIG}"
cd "${LIVE_TEMPLATE}"
# Uninstall is best-effort — don't abort if it fails
bash ./uninstall.sh || echo "Warning: uninstall.sh failed, continuing anyway"
else
echo "── Step 2: No existing service to uninstall ──"
fi
# ═══════════════════════════════════════════════════════════════════
# STEP 3: Swap staging → live
# ═══════════════════════════════════════════════════════════════════
echo "── Step 3: Swapping staging to live ──"
# Remove old live (if exists)
rm -rf "${LIVE_TEMPLATE}" "${LIVE_CONFIG}"
# Move staging into place
mkdir -p "${SERVICE_DIR}"
mv "${STAGING_CONFIG}" "${LIVE_CONFIG}"
mv "${STAGING_TEMPLATE}" "${LIVE_TEMPLATE}"
rm -rf "${STAGING_DIR}"
# ═══════════════════════════════════════════════════════════════════
# STEP 4: Run install.sh from LIVE (now the new version)
# ═══════════════════════════════════════════════════════════════════
echo "── Step 4: Running install.sh (new version) ──"
load_env "${LIVE_TEMPLATE}" "${LIVE_CONFIG}"
cd "${LIVE_TEMPLATE}"
bash ./install.sh || _die "install.sh failed"
echo "── Install complete for ${SERVICE} ──"