a1a8eab41a
- write_config(): Replace CHANGEME placeholder on upgrade instead of skipping entirely; preserve existing real passwords unchanged - setup_database(): When DB user already exists, recover password from existing config and sync to PostgreSQL, or generate a fresh password; fixes crash-loop when config password diverges from PostgreSQL - generate_jwt_keys(): Regenerate missing verify.pem from existing signing.pem instead of silently skipping - Password extraction uses @localhost anchor to correctly handle passwords containing @ characters
403 lines
17 KiB
Bash
403 lines
17 KiB
Bash
#!/bin/bash
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set -e
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# =============================================================================
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# Linux Patch Manager — Post-install script
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# =============================================================================
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# Fully automated: apt install ./linux-patch-manager_X.X.X-1_amd64.deb
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# results in a running service with a printed admin password.
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# All steps are idempotent (safe to re-run on upgrade).
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# =============================================================================
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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CYAN='\033[0;36m'
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NC='\033[0m'
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info() { echo -e "${GREEN}[INFO]${NC} $*"; }
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warn() { echo -e "${YELLOW}[WARN]${NC} $*"; }
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error() { echo -e "${RED}[ERROR]${NC} $*" >&2; }
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DB_NAME="patch_manager"
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DB_USER="patch_manager"
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CONFIG_DIR="/etc/patch-manager"
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MIGRATION_DIR="/usr/share/patch-manager/migrations"
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ADMIN_PASSWORD_FILE="/etc/patch-manager/admin-password.txt"
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# ---------------------------------------------------------------------------
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# PostgreSQL helpers
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# ---------------------------------------------------------------------------
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psql_run() {
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# Run SQL as the postgres superuser
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sudo -u postgres psql -v ON_ERROR_STOP=1 "$@" 2>/dev/null
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}
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psql_run_db() {
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# Run SQL against the patch_manager database
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sudo -u postgres psql -v ON_ERROR_STOP=1 -d "${DB_NAME}" "$@" 2>/dev/null
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}
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# ---------------------------------------------------------------------------
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# 1. Create service user (idempotent)
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# ---------------------------------------------------------------------------
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create_service_user() {
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if ! id patch-manager &>/dev/null; then
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useradd --system --no-create-home --shell /usr/sbin/nologin \
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--comment "Linux Patch Manager service account" patch-manager
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info "Service user 'patch-manager' created."
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else
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info "Service user 'patch-manager' already exists."
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fi
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}
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# ---------------------------------------------------------------------------
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# 2. Create required directories (idempotent)
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# ---------------------------------------------------------------------------
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create_directories() {
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mkdir -p "${CONFIG_DIR}/ca" "${CONFIG_DIR}/certs" \
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"${CONFIG_DIR}/jwt" "${CONFIG_DIR}/tls" \
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/var/log/patch-manager /opt/patch-manager \
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/var/backups/patch-manager
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chown -R patch-manager:patch-manager \
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"${CONFIG_DIR}" /var/log/patch-manager \
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/opt/patch-manager /usr/share/patch-manager/frontend
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chmod 750 "${CONFIG_DIR}/ca" "${CONFIG_DIR}/jwt"
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chmod 700 /var/backups/patch-manager
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}
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# ---------------------------------------------------------------------------
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# 3. Wait for PostgreSQL to be ready
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# ---------------------------------------------------------------------------
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wait_for_postgresql() {
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info "Waiting for PostgreSQL to be ready..."
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local retries=30
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local delay=2
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local i
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for ((i = 1; i <= retries; i++)); do
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if pg_isready -q 2>/dev/null; then
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info "PostgreSQL is ready."
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return 0
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fi
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warn "PostgreSQL not ready yet (attempt ${i}/${retries}), waiting ${delay}s..."
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sleep "${delay}"
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done
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error "PostgreSQL did not become ready after $((retries * delay)) seconds."
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return 1
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}
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# ---------------------------------------------------------------------------
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# 4. Create PostgreSQL user and database (idempotent)
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# ---------------------------------------------------------------------------
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setup_database() {
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info "Setting up PostgreSQL database and user..."
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# Generate a random password for the DB user
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local db_password
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db_password=$(openssl rand -base64 32 | tr -dc 'A-Za-z0-9' | head -c 32)
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# Create role if not exists
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local role_exists
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role_exists=$(psql_run -t -A -c "SELECT 1 FROM pg_roles WHERE rolname='${DB_USER}'" 2>/dev/null || echo "")
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if [[ "${role_exists}" != "1" ]]; then
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psql_run -c "CREATE ROLE ${DB_USER} LOGIN PASSWORD '${db_password}';"
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info "PostgreSQL user '${DB_USER}' created."
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# Store password for config generation
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echo "${db_password}" > /tmp/.pm-db-password-new
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else
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info "PostgreSQL user '${DB_USER}' already exists."
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# Recover the DB password: try from existing config, or generate new.
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local config_file="${CONFIG_DIR}/config.toml"
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local existing_pw=""
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if [[ -f "${config_file}" ]]; then
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# Extract password from URL: postgres://user:PASSWORD@host/db
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# Use @localhost anchor so passwords containing @ are extracted correctly.
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existing_pw=$(sed -n 's|^url = "postgres://[^:]*:\(.*\)@localhost.*"|\1|p' "${config_file}" | head -1)
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fi
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if [[ -n "${existing_pw}" && "${existing_pw}" != "CHANGEME" ]]; then
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# Config has a real password — sync it to PostgreSQL so the app can connect.
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psql_run -c "ALTER ROLE ${DB_USER} WITH PASSWORD '${existing_pw}';" 2>/dev/null || true
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echo "${existing_pw}" > /tmp/.pm-db-password-new
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info "Synced DB password from existing config to PostgreSQL."
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else
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# No config or CHANGEME — generate a fresh password and update PostgreSQL.
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db_password=$(openssl rand -base64 32 | tr -dc 'A-Za-z0-9' | head -c 32)
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psql_run -c "ALTER ROLE ${DB_USER} WITH PASSWORD '${db_password}';" 2>/dev/null || true
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echo "${db_password}" > /tmp/.pm-db-password-new
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info "Generated new DB password for existing user."
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fi
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fi
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# Create database if not exists
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local db_exists
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db_exists=$(psql_run -t -A -c "SELECT 1 FROM pg_database WHERE datname='${DB_NAME}'" 2>/dev/null || echo "")
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if [[ "${db_exists}" != "1" ]]; then
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psql_run -c "CREATE DATABASE ${DB_NAME} OWNER ${DB_USER};"
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info "Database '${DB_NAME}' created."
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else
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info "Database '${DB_NAME}' already exists, skipping creation."
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fi
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# Grant permissions (idempotent)
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psql_run_db -c "GRANT USAGE ON SCHEMA public TO ${DB_USER};" 2>/dev/null || true
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psql_run_db -c "GRANT CREATE ON SCHEMA public TO ${DB_USER};" 2>/dev/null || true
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psql_run_db -c "GRANT ALL PRIVILEGES ON DATABASE ${DB_NAME} TO ${DB_USER};" 2>/dev/null || true
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}
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# ---------------------------------------------------------------------------
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# 5. Apply database migrations (idempotent)
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# ---------------------------------------------------------------------------
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apply_migrations() {
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info "Applying database migrations..."
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# Ensure pgcrypto extension is available
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psql_run_db -c "CREATE EXTENSION IF NOT EXISTS pgcrypto;" 2>/dev/null || true
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# Create migration tracking table if not exists
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psql_run_db <<'MIGSQL'
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CREATE TABLE IF NOT EXISTS _migrations (
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id SERIAL PRIMARY KEY,
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filename TEXT NOT NULL UNIQUE,
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applied_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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MIGSQL
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# Handle upgrade from pre-migration-tracking versions:
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# If tables exist but _migrations is empty, mark all existing migrations as applied.
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local migration_count
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migration_count=$(psql_run_db -t -A -c "SELECT COUNT(*) FROM _migrations;" 2>/dev/null || echo "0")
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migration_count="${migration_count// /}"
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local tables_exist
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tables_exist=$(psql_run_db -t -A -c "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema='public' AND table_name='users';" 2>/dev/null || echo "0")
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tables_exist="${tables_exist// /}"
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if [[ "${migration_count}" == "0" && "${tables_exist}" -gt 0 ]]; then
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info "Existing database detected — marking all shipped migrations as already applied."
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for sql_file in $(ls "${MIGRATION_DIR}"/*.sql 2>/dev/null | sort); do
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local fname
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fname=$(basename "${sql_file}")
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psql_run_db -c "INSERT INTO _migrations (filename) VALUES ('${fname}') ON CONFLICT (filename) DO NOTHING;" 2>/dev/null || true
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done
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fi
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# Apply each migration in sorted order, skipping already-applied ones
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local applied=0
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local skipped=0
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for sql_file in $(ls "${MIGRATION_DIR}"/*.sql 2>/dev/null | sort); do
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local fname
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fname=$(basename "${sql_file}")
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local already_applied
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already_applied=$(psql_run_db -t -A -c "SELECT COUNT(*) FROM _migrations WHERE filename='${fname}';" 2>/dev/null || echo "0")
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already_applied="${already_applied// /}"
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if [[ "${already_applied}" -gt 0 ]]; then
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skipped=$((skipped + 1))
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continue
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fi
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info " Applying migration: ${fname}"
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if psql_run_db -f "${sql_file}"; then
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psql_run_db -c "INSERT INTO _migrations (filename) VALUES ('${fname}');" 2>/dev/null || true
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applied=$((applied + 1))
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else
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error " Failed to apply migration: ${fname}"
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return 1
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fi
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done
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if [[ "${applied}" -gt 0 ]]; then
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info "Applied ${applied} new migration(s), skipped ${skipped} already applied."
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else
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info "All migrations up to date (${skipped} already applied)."
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fi
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}
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# ---------------------------------------------------------------------------
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# 6. Generate admin password and update database
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# ---------------------------------------------------------------------------
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generate_admin_password() {
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info "Generating admin password..."
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# Generate a random 24-character password
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local admin_password
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admin_password=$(openssl rand -base64 32 | tr -dc 'A-Za-z0-9!@#%^&*' | head -c 24)
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# Hash with argon2 (PHC format, compatible with the application)
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# Generate a random 16-character salt (argon2 requires minimum 8 characters)
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local admin_salt
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admin_salt=$(openssl rand -base64 24 | tr -dc 'A-Za-z0-9' | head -c 16)
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local password_hash
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password_hash=$(echo -n "${admin_password}" | argon2 "${admin_salt}" -id -t 3 -m 16 -p 1 -l 32 -e)
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# Update admin user password in database
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# Only update if the placeholder hash is still present
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# The placeholder starts with: $argon2id$v=19$m=65536,t=3,p=1$AAAAAAAAAAAAAAAA
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# Using single-quoted variable to preserve $ signs in SQL LIKE pattern
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local placeholder_pattern
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placeholder_pattern='$argon2id$v=19$m=65536,t=3,p=1$AAAAAAAAAAAAAAAA%'
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local updated
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updated=$(psql_run_db -t -A -c \
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"UPDATE users SET password_hash = '${password_hash}', force_password_reset = TRUE \
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WHERE username = 'admin' AND password_hash LIKE '${placeholder_pattern}' \
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RETURNING id;" 2>/dev/null || echo "")
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if [[ -n "${updated}" ]]; then
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# Write admin password to file (mode 600, owned by root)
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echo "${admin_password}" > "${ADMIN_PASSWORD_FILE}"
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chmod 600 "${ADMIN_PASSWORD_FILE}"
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chown root:root "${ADMIN_PASSWORD_FILE}"
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echo ""
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echo -e "${CYAN}=============================================${NC}"
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echo -e "${CYAN} Linux Patch Manager — Admin Credentials${NC}"
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echo -e "${CYAN}=============================================${NC}"
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echo -e " Username: ${GREEN}admin${NC}"
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echo -e " Password: ${GREEN}${admin_password}${NC}"
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echo ""
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echo -e " ${YELLOW}IMPORTANT: Save this password! It will not be shown again.${NC}"
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echo -e " Password also saved to: ${ADMIN_PASSWORD_FILE}"
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echo -e "${CYAN}=============================================${NC}"
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echo ""
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else
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info "Admin password already set (not a fresh install). Password file not regenerated."
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fi
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}
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# ---------------------------------------------------------------------------
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# 7. Write config.toml with DB URL
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# ---------------------------------------------------------------------------
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# Handles three scenarios:
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# 1. No config file → create from example with real DB password
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# 2. Config exists with CHANGEME → replace CHANGEME with real DB password
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# 3. Config exists with real password → leave it alone (upgrade)
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# ---------------------------------------------------------------------------
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write_config() {
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local config_file="${CONFIG_DIR}/config.toml"
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# Resolve the DB password to use: from setup_database() or generate fresh.
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local db_password=""
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if [[ -f /tmp/.pm-db-password-new ]]; then
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db_password=$(cat /tmp/.pm-db-password-new)
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fi
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if [[ -f "${config_file}" ]]; then
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# Check if the config still has the CHANGEME placeholder
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if grep -q 'CHANGEME' "${config_file}"; then
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if [[ -z "${db_password}" ]]; then
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# No password from setup_database() — generate a fresh one
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db_password=$(openssl rand -base64 32 | tr -dc 'A-Za-z0-9' | head -c 32)
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psql_run -c "ALTER ROLE ${DB_USER} WITH PASSWORD '${db_password}';" 2>/dev/null || true
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fi
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info "Replacing CHANGEME placeholder in existing config with real DB password."
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sed -i "s|postgres://patch_manager:CHANGEME@localhost/patch_manager|postgres://${DB_USER}:${db_password}@localhost/${DB_NAME}|" "${config_file}"
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else
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info "Config file ${config_file} already exists with a real password, leaving it unchanged."
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return 0
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fi
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else
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# No config file — create from example
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if [[ -z "${db_password}" ]]; then
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db_password=$(openssl rand -base64 32 | tr -dc 'A-Za-z0-9' | head -c 32)
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psql_run -c "ALTER ROLE ${DB_USER} WITH PASSWORD '${db_password}';" 2>/dev/null || true
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fi
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info "Writing configuration file..."
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cp /usr/share/patch-manager/config.example.toml "${config_file}"
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sed -i "s|postgres://patch_manager:CHANGEME@localhost/patch_manager|postgres://${DB_USER}:${db_password}@localhost/${DB_NAME}|" "${config_file}"
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fi
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chown patch-manager:patch-manager "${config_file}"
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chmod 640 "${config_file}"
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info "Configuration written to ${config_file}"
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}
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# ---------------------------------------------------------------------------
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# 8. Generate JWT keys (idempotent)
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# Only generates if missing; regenerates verify.pem from signing.pem if lost.
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# ---------------------------------------------------------------------------
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generate_jwt_keys() {
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if [[ ! -f "${CONFIG_DIR}/jwt/signing.pem" ]]; then
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info "Generating Ed25519 JWT signing key..."
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openssl genpkey -algorithm ed25519 -out "${CONFIG_DIR}/jwt/signing.pem" 2>/dev/null
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openssl pkey -in "${CONFIG_DIR}/jwt/signing.pem" -pubout -out "${CONFIG_DIR}/jwt/verify.pem" 2>/dev/null
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chown patch-manager:patch-manager "${CONFIG_DIR}/jwt/signing.pem" "${CONFIG_DIR}/jwt/verify.pem"
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chmod 600 "${CONFIG_DIR}/jwt/signing.pem"
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chmod 644 "${CONFIG_DIR}/jwt/verify.pem"
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info "JWT keys generated."
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elif [[ ! -f "${CONFIG_DIR}/jwt/verify.pem" ]]; then
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info "Regenerating missing JWT verification key from existing signing key..."
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openssl pkey -in "${CONFIG_DIR}/jwt/signing.pem" -pubout -out "${CONFIG_DIR}/jwt/verify.pem" 2>/dev/null
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chown patch-manager:patch-manager "${CONFIG_DIR}/jwt/verify.pem"
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chmod 644 "${CONFIG_DIR}/jwt/verify.pem"
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info "JWT verification key regenerated."
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else
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info "JWT keys already exist, skipping."
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fi
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}
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# ---------------------------------------------------------------------------
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# 9. Enable and start services
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# ---------------------------------------------------------------------------
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enable_and_start_services() {
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systemctl daemon-reload
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# Enable the target (which pulls in web + worker)
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systemctl enable patch-manager.target 2>/dev/null || true
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# Start or restart services
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if systemctl is-active --quiet patch-manager.target 2>/dev/null; then
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info "Restarting patch-manager services (upgrade)..."
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systemctl restart patch-manager.target 2>/dev/null || true
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else
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info "Starting patch-manager services..."
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systemctl start patch-manager.target 2>/dev/null || true
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fi
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}
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# ---------------------------------------------------------------------------
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# 10. Install backup cron (idempotent)
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# ---------------------------------------------------------------------------
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install_backup_cron() {
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if ! crontab -l 2>/dev/null | grep -qF "backup.sh"; then
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(crontab -l 2>/dev/null; echo "0 2 * * * /usr/local/bin/backup.sh >> /var/log/patch-manager/backup.log 2>&1") | crontab -
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info "Nightly backup cron installed."
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fi
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}
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# =============================================================================
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# Main
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# =============================================================================
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case "$1" in
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configure)
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create_service_user
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create_directories
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wait_for_postgresql
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setup_database
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apply_migrations
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generate_admin_password
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write_config
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generate_jwt_keys
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enable_and_start_services
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install_backup_cron
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# Clean up temp file
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rm -f /tmp/.pm-db-password-new
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info "Linux Patch Manager installation complete."
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;;
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abort-upgrade|abort-remove|abort-deconfigure)
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;;
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*)
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echo "postinst called with unknown argument \`$1'" >&2
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;;
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esac
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exit 0
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