352 lines
12 KiB
Bash
Executable File
352 lines
12 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -Eeuo pipefail
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# Do not expose headers, cookies, or future sensitive values through caller xtrace.
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set +x
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umask 077
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readonly EXPECTED_CANDIDATE_SHA256="de7ebd4f69cd7d2204ee633e074bf6a4370a6f5e3f3fac9067b099d5d75269b5"
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readonly EXPECTED_PRE_CUTOVER_SHA256="5b5941519ab677f751568827aa4f315193dfbd9eeac5e8a4ad85d724aaefe16f"
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readonly EXPECTED_PRE_CUTOVER_HEALTH_SHA256="6b683cb16987ff1f5ded22e9847ac0a45995947927c459b21f427523a41c7484"
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readonly REPOSITORY_ROOT="/home/donghyeon/workspace/platform"
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readonly CANDIDATE="${REPOSITORY_ROOT}/infrastructure/networking/host-nginx/learn-services.conf"
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readonly ACTIVE="/etc/nginx/sites-available/learn-services"
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readonly ENABLED="/etc/nginx/sites-enabled/learn-services"
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readonly CURL_BIN="/usr/bin/curl"
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readonly JQ_BIN="/usr/bin/jq"
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readonly NGINX_BIN="/usr/sbin/nginx"
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readonly SYSTEMCTL_BIN="/usr/bin/systemctl"
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readonly INSTALL_BIN="/usr/bin/install"
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readonly SHA256SUM_BIN="/usr/bin/sha256sum"
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readonly STAT_BIN="/usr/bin/stat"
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readonly READLINK_BIN="/usr/bin/readlink"
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readonly MKTEMP_BIN="/usr/bin/mktemp"
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readonly RM_BIN="/usr/bin/rm"
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readonly DATE_BIN="/usr/bin/date"
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readonly AWK_BIN="/usr/bin/awk"
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readonly SLEEP_BIN="/usr/bin/sleep"
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fail() {
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printf 'ERROR: %s\n' "$*" >&2
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return 1
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}
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usage() {
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printf '%s\n' \
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'Usage: sudo bash scripts/bootstrap/apply-host-nginx-gitea.sh --execute' \
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'' \
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'Backs up the active learn-services site, installs the reviewed Gitea proxy,' \
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'tests and reloads Nginx, then runs local acceptance checks. Any failure after' \
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'the active file changes triggers an automatic restore and reload.'
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}
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[[ "${1:-}" == "--execute" && "$#" -eq 1 ]] || {
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usage
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exit 2
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}
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[[ "$EUID" -eq 0 ]] || fail "run this script through sudo"
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[[ -t 0 ]] || fail "an interactive terminal is required"
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for required_binary in \
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"$CURL_BIN" "$JQ_BIN" "$NGINX_BIN" "$SYSTEMCTL_BIN" "$INSTALL_BIN" \
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"$SHA256SUM_BIN" "$STAT_BIN" "$READLINK_BIN" "$MKTEMP_BIN" \
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"$RM_BIN" "$DATE_BIN" "$AWK_BIN" "$SLEEP_BIN"; do
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[[ -x "$required_binary" ]] || fail "required executable is missing: ${required_binary}"
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done
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[[ -f "$CANDIDATE" && ! -L "$CANDIDATE" ]] || fail "unsafe candidate: ${CANDIDATE}"
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[[ -f "$ACTIVE" && ! -L "$ACTIVE" ]] || fail "unsafe active file: ${ACTIVE}"
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[[ -L "$ENABLED" ]] || fail "enabled path is not a symlink: ${ENABLED}"
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[[ "$("$READLINK_BIN" -f "$ENABLED")" == "$ACTIVE" ]] || fail "enabled symlink target changed"
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[[ "$("$STAT_BIN" --format='%U:%G %a' "$ACTIVE")" == "root:root 644" ]] || \
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fail "active file owner or mode changed"
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"$SYSTEMCTL_BIN" is-active --quiet nginx || fail "nginx is not active"
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readonly TEMP_DIR="$("$MKTEMP_BIN" -d /tmp/nginx-gitea-cutover.XXXXXX)"
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readonly CANDIDATE_SNAPSHOT="${TEMP_DIR}/learn-services.candidate"
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readonly DIRECT_HEALTH="${TEMP_DIR}/direct-health.json"
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readonly NGINX_HEALTH="${TEMP_DIR}/nginx-health.json"
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readonly LOGIN_HEADERS="${TEMP_DIR}/login-headers"
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rollback_armed=0
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backup=""
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cleanup() {
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case "$TEMP_DIR" in
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/tmp/nginx-gitea-cutover.*)
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"$RM_BIN" -rf -- "$TEMP_DIR"
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;;
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*)
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printf 'WARNING: refusing to remove unexpected temp path: %s\n' "$TEMP_DIR" >&2
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;;
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esac
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}
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rollback() {
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local restore_install_rc
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local restore_test_rc
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local restore_reload_rc
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set +e
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printf '\nROLLBACK: restoring %s\n' "$backup" >&2
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if "$INSTALL_BIN" -o root -g root -m 0644 "$backup" "$ACTIVE" &&
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[[ "$("$SHA256SUM_BIN" "$ACTIVE" | "$AWK_BIN" '{print $1}')" == "$("$SHA256SUM_BIN" "$backup" | "$AWK_BIN" '{print $1}')" ]]; then
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restore_install_rc=0
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else
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restore_install_rc=1
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fi
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"$NGINX_BIN" -t
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restore_test_rc=$?
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if (( restore_install_rc == 0 && restore_test_rc == 0 )); then
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if "$SYSTEMCTL_BIN" reload nginx &&
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"$SYSTEMCTL_BIN" is-active --quiet nginx &&
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wait_for_rollback_state; then
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restore_reload_rc=0
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else
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restore_reload_rc=1
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fi
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else
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restore_reload_rc=1
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fi
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if (( restore_install_rc == 0 && restore_test_rc == 0 && restore_reload_rc == 0 )); then
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rollback_armed=0
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printf 'ROLLBACK complete. Active config and response were restored.\n' >&2
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else
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printf 'CRITICAL: automatic rollback failed; backup remains at %s\n' "$backup" >&2
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fi
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}
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on_exit() {
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local rc=$?
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trap - EXIT INT TERM
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if (( rc != 0 && rollback_armed == 1 )); then
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rollback
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fi
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cleanup
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exit "$rc"
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}
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trap on_exit EXIT
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trap 'exit 130' INT
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trap 'exit 143' TERM
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"$INSTALL_BIN" -o root -g root -m 0600 "$CANDIDATE" "$CANDIDATE_SNAPSHOT"
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readonly CANDIDATE_SHA256="$("$SHA256SUM_BIN" "$CANDIDATE_SNAPSHOT" | "$AWK_BIN" '{print $1}')"
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readonly ACTIVE_SHA256="$("$SHA256SUM_BIN" "$ACTIVE" | "$AWK_BIN" '{print $1}')"
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[[ "$CANDIDATE_SHA256" == "$EXPECTED_CANDIDATE_SHA256" ]] || \
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fail "candidate digest changed: ${CANDIDATE_SHA256}"
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if [[ "$ACTIVE_SHA256" != "$EXPECTED_PRE_CUTOVER_SHA256" && "$ACTIVE_SHA256" != "$CANDIDATE_SHA256" ]]; then
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fail "active config has an unexpected digest: ${ACTIVE_SHA256}"
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fi
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check_health_json() {
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local path="$1"
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"$JQ_BIN" -e '
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.status == "pass" and
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([.checks["database:ping"][], .checks["cache:ping"][]] |
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all(.status == "pass"))
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' "$path" >/dev/null
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}
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pre_cutover_check() {
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"$CURL_BIN" --noproxy '*' --fail-with-body --silent --show-error --max-time 10 \
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--header 'Host: git.learn.hyeonworks.com' \
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http://127.0.0.1:30080/api/healthz >"$DIRECT_HEALTH"
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check_health_json "$DIRECT_HEALTH"
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}
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wait_for_nginx_health() {
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local attempt
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local probe_metadata=""
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local http_code="curl-error"
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local content_type="unavailable"
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local size_download="0"
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local body_sha256=""
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local classification="transport-error"
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local consecutive_passes=0
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for ((attempt = 1; attempt <= 10; attempt++)); do
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if probe_metadata="$(
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"$CURL_BIN" --noproxy '*' --silent --connect-timeout 1 --max-time 2 \
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--resolve git.learn.hyeonworks.com:443:127.0.0.1 \
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--output "$NGINX_HEALTH" \
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--write-out $'%{http_code}\t%{content_type}\t%{size_download}' \
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https://git.learn.hyeonworks.com/api/healthz
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)"; then
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IFS=$'\t' read -r http_code content_type size_download <<<"$probe_metadata"
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body_sha256="$(
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"$SHA256SUM_BIN" "$NGINX_HEALTH" | "$AWK_BIN" '{print $1}'
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)"
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if [[ "$http_code" == "200" ]] &&
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check_health_json "$NGINX_HEALTH" 2>/dev/null; then
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classification="healthy-json"
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consecutive_passes=$((consecutive_passes + 1))
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if (( consecutive_passes >= 2 )); then
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printf 'Nginx proxy health stabilized after %d probes.\n' "$attempt"
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return 0
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fi
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else
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consecutive_passes=0
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if [[ "$body_sha256" == "$EXPECTED_PRE_CUTOVER_HEALTH_SHA256" ]]; then
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classification="stale-old-generation"
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elif [[ "$http_code" =~ ^(502|503|504)$ ]]; then
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classification="transient-upstream"
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elif "$JQ_BIN" -e '
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type == "object" and
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has("status") and
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(.checks | type == "object")
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' "$NGINX_HEALTH" >/dev/null 2>&1; then
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classification="unhealthy-health-json"
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else
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printf 'ERROR: unexpected Nginx health response (status=%s, content-type=%s, bytes=%s, sha256=%s)\n' \
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"$http_code" "${content_type:-none}" "$size_download" "$body_sha256" >&2
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return 1
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fi
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fi
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else
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http_code="curl-error"
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content_type="unavailable"
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size_download="0"
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body_sha256=""
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classification="transport-error"
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consecutive_passes=0
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fi
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if (( attempt < 10 )); then
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"$SLEEP_BIN" 1
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fi
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done
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fail "Nginx health did not converge during the bounded retry window (classification=${classification}, status=${http_code}, content-type=${content_type:-none}, bytes=${size_download})"
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}
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wait_for_rollback_state() {
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local attempt
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local probe_metadata=""
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local http_code="curl-error"
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local content_type="unavailable"
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local size_download="0"
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local body_sha256=""
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for ((attempt = 1; attempt <= 10; attempt++)); do
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if probe_metadata="$(
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"$CURL_BIN" --noproxy '*' --silent --connect-timeout 1 --max-time 2 \
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--resolve git.learn.hyeonworks.com:443:127.0.0.1 \
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--output "$NGINX_HEALTH" \
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--write-out $'%{http_code}\t%{content_type}\t%{size_download}' \
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https://git.learn.hyeonworks.com/api/healthz
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)"; then
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IFS=$'\t' read -r http_code content_type size_download <<<"$probe_metadata"
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body_sha256="$(
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"$SHA256SUM_BIN" "$NGINX_HEALTH" | "$AWK_BIN" '{print $1}'
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)"
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if [[ "$http_code" == "200" &&
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"$body_sha256" == "$EXPECTED_PRE_CUTOVER_HEALTH_SHA256" ]]; then
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if (( attempt > 1 )); then
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printf 'Rollback proxy state stabilized after %d probes.\n' "$attempt" >&2
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fi
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return 0
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fi
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else
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http_code="curl-error"
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content_type="unavailable"
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size_download="0"
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body_sha256=""
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fi
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if (( attempt < 10 )); then
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"$SLEEP_BIN" 1
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fi
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done
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printf 'CRITICAL: rollback response did not converge (status=%s, content-type=%s, bytes=%s, sha256=%s)\n' \
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"$http_code" "${content_type:-none}" "$size_download" "${body_sha256:-none}" >&2
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return 1
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}
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post_cutover_checks() {
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local id_body
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local redirect_result
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wait_for_nginx_health
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id_body="$(
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"$CURL_BIN" --noproxy '*' --fail-with-body --silent --show-error --max-time 10 \
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--resolve id.learn.hyeonworks.com:443:127.0.0.1 \
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https://id.learn.hyeonworks.com/
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)"
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[[ "$id_body" == "Keycloak domain reached Nginx successfully" ]] || \
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fail "Keycloak hold response changed"
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redirect_result="$(
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"$CURL_BIN" --noproxy '*' --silent --show-error --max-time 10 \
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--resolve git.learn.hyeonworks.com:80:127.0.0.1 \
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--output /dev/null --write-out $'%{http_code}\n%{redirect_url}' \
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http://git.learn.hyeonworks.com/api/healthz
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)"
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[[ "$redirect_result" == $'301\nhttps://git.learn.hyeonworks.com/api/healthz' ]] || \
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fail "HTTP redirect check failed: ${redirect_result}"
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if "$CURL_BIN" --noproxy '*' --insecure --silent --output /dev/null --max-time 5 \
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--resolve unconfigured.invalid:443:127.0.0.1 \
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https://unconfigured.invalid/ 2>/dev/null; then
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fail "unknown TLS hostname was not rejected"
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fi
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"$CURL_BIN" --noproxy '*' --fail-with-body --silent --show-error --max-time 10 \
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--resolve git.learn.hyeonworks.com:443:127.0.0.1 \
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--dump-header "$LOGIN_HEADERS" --output /dev/null \
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https://git.learn.hyeonworks.com/user/login
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"$AWK_BIN" '
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BEGIN { found = 0; insecure = 0 }
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tolower($0) ~ /^set-cookie:/ {
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found++
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if (tolower($0) !~ /; secure([;[:space:]]|$)/) insecure = 1
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}
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END { exit(found == 0 || insecure) }
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' "$LOGIN_HEADERS" || fail "login cookie Secure check failed"
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}
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pre_cutover_check
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"$NGINX_BIN" -t
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if [[ "$ACTIVE_SHA256" == "$CANDIDATE_SHA256" ]]; then
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post_cutover_checks
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printf 'The reviewed Host Nginx configuration is already active and healthy.\n'
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exit 0
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fi
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backup="${ACTIVE}.before-gitea-$("$DATE_BIN" +%Y%m%d%H%M%S)"
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[[ ! -e "$backup" && ! -L "$backup" ]] || fail "backup path already exists: ${backup}"
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printf '\nActive SHA-256: %s\n' "$ACTIVE_SHA256"
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printf 'Candidate SHA-256: %s\n' "$CANDIDATE_SHA256"
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printf 'Planned backup: %s\n' "$backup"
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printf 'Type APPLY to replace the Host Nginx site: '
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read -r confirmation
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[[ "$confirmation" == "APPLY" ]] || fail "cancelled"
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"$INSTALL_BIN" -o root -g root -m 0644 "$ACTIVE" "$backup"
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[[ "$("$SHA256SUM_BIN" "$backup" | "$AWK_BIN" '{print $1}')" == "$ACTIVE_SHA256" ]] || \
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fail "backup digest mismatch"
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rollback_armed=1
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"$INSTALL_BIN" -o root -g root -m 0644 "$CANDIDATE_SNAPSHOT" "$ACTIVE"
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[[ "$("$SHA256SUM_BIN" "$ACTIVE" | "$AWK_BIN" '{print $1}')" == "$CANDIDATE_SHA256" ]] || \
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fail "installed digest mismatch"
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"$NGINX_BIN" -t
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"$SYSTEMCTL_BIN" reload nginx
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"$SYSTEMCTL_BIN" is-active --quiet nginx
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post_cutover_checks
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rollback_armed=0
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printf '\nCUTOVER SUCCESS\n'
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printf 'Backup: %s\n' "$backup"
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printf 'Candidate SHA-256: %s\n' "$CANDIDATE_SHA256"
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printf 'Local HTTPS health, redirect, Secure cookie, Keycloak hold, and unknown-host rejection: PASS\n'
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printf 'Run the public HTTPS and Git clone/push checks from a separate client next.\n'
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