Add platform infrastructure configuration
This commit is contained in:
donghyeon-ka
+299
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#!/usr/bin/env bash
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set -Eeuo pipefail
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set +x
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umask 077
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readonly EXPECTED_CANDIDATE_SHA256="5c5cd74b4992f537fd27c50cf2209573a80a9904e0b19b58c3154717be6ff4a5"
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readonly EXPECTED_PRE_CUTOVER_SHA256="de7ebd4f69cd7d2204ee633e074bf6a4370a6f5e3f3fac9067b099d5d75269b5"
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readonly REPOSITORY_ROOT="/home/donghyeon/workspace/platform"
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readonly CANDIDATE="${REPOSITORY_ROOT}/infrastructure/networking/host-nginx/learn-services-keycloak.conf"
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readonly ACTIVE="/etc/nginx/sites-available/learn-services"
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readonly ENABLED="/etc/nginx/sites-enabled/learn-services"
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readonly GITEA_HOST="git.learn.hyeonworks.com"
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readonly KEYCLOAK_HOST="id.learn.hyeonworks.com"
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readonly KEYCLOAK_ISSUER="https://${KEYCLOAK_HOST}/realms/hyeonworks"
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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' "$*" >&2
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return 1
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}
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usage() {
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printf '%s\n' \
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'Usage: sudo bash scripts/bootstrap/apply-host-nginx-keycloak.sh --execute' \
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'' \
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'Replaces the static id.learn response with the reviewed Keycloak proxy.' \
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'The active site is backed up first; a failed test or health check restores' \
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'the prior Gitea-only configuration and reloads Nginx automatically.'
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}
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[[ "${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")" == "$ACTIVE" ]] || \
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fail "enabled symlink target changed"
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[[ "$("$STAT_BIN" --format='%U:%G %a' "$ACTIVE")" == "root:root 644" ]] || \
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fail "active file owner or mode changed"
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"$SYSTEMCTL_BIN" is-active --quiet nginx || fail "nginx is not active"
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readonly TEMP_DIR="$("$MKTEMP_BIN" -d /tmp/nginx-keycloak-cutover.XXXXXX)"
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readonly CANDIDATE_SNAPSHOT="${TEMP_DIR}/learn-services.candidate"
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readonly GITEA_HEALTH="${TEMP_DIR}/gitea-health.json"
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readonly KEYCLOAK_DISCOVERY="${TEMP_DIR}/keycloak-discovery.json"
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readonly LOGIN_HEADERS="${TEMP_DIR}/gitea-login-headers"
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rollback_armed=0
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backup=""
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cleanup() {
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case "$TEMP_DIR" in
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/tmp/nginx-keycloak-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' \
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"$TEMP_DIR" >&2
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;;
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esac
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}
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check_gitea_health() {
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"$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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' "$GITEA_HEALTH" >/dev/null
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}
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check_keycloak_discovery() {
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"$JQ_BIN" -e \
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--arg issuer "$KEYCLOAK_ISSUER" '
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.issuer == $issuer and
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(.authorization_endpoint | startswith($issuer)) and
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(.token_endpoint | startswith($issuer)) and
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(.userinfo_endpoint | startswith($issuer)) and
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(.jwks_uri | startswith($issuer))
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' "$KEYCLOAK_DISCOVERY" >/dev/null
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}
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pre_cutover_checks() {
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"$CURL_BIN" --disable --noproxy '*' --fail-with-body --silent --show-error --max-time 10 \
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--header "Host: ${GITEA_HOST}" \
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--header 'X-Forwarded-Proto: https' \
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http://127.0.0.1:30080/api/healthz >"$GITEA_HEALTH"
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check_gitea_health
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"$CURL_BIN" --disable --noproxy '*' --fail-with-body --silent --show-error --max-time 10 \
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--header "Host: ${KEYCLOAK_HOST}" \
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--header 'X-Forwarded-Host: id.learn.hyeonworks.com' \
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--header 'X-Forwarded-Proto: https' \
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--header 'X-Forwarded-Port: 443' \
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"http://127.0.0.1:30080/realms/hyeonworks/.well-known/openid-configuration" \
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>"$KEYCLOAK_DISCOVERY"
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check_keycloak_discovery
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}
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wait_for_proxy_state() {
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local attempt
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for ((attempt = 1; attempt <= 12; attempt++)); do
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if "$CURL_BIN" --disable --noproxy '*' --fail --silent --show-error \
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--connect-timeout 1 --max-time 3 \
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--resolve "${GITEA_HOST}:443:127.0.0.1" \
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"https://${GITEA_HOST}/api/healthz" >"$GITEA_HEALTH" 2>/dev/null &&
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check_gitea_health 2>/dev/null &&
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"$CURL_BIN" --disable --noproxy '*' --fail --silent --show-error \
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--connect-timeout 1 --max-time 3 \
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--resolve "${KEYCLOAK_HOST}:443:127.0.0.1" \
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"https://${KEYCLOAK_HOST}/realms/hyeonworks/.well-known/openid-configuration" \
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>"$KEYCLOAK_DISCOVERY" 2>/dev/null &&
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check_keycloak_discovery 2>/dev/null; then
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if (( attempt > 1 )); then
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printf 'Nginx proxy state stabilized after %d probes.\n' "$attempt"
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fi
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return 0
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fi
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(( attempt < 12 )) && "$SLEEP_BIN" 1
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done
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return 1
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}
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wait_for_rollback_state() {
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local attempt
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local id_body
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for ((attempt = 1; attempt <= 12; attempt++)); do
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id_body="$(
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"$CURL_BIN" --disable --noproxy '*' --fail --silent --show-error \
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--connect-timeout 1 --max-time 3 \
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--resolve "${KEYCLOAK_HOST}:443:127.0.0.1" \
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"https://${KEYCLOAK_HOST}/" 2>/dev/null
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)" || id_body=""
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if [[ "$id_body" == "Keycloak domain reached Nginx successfully" ]] &&
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"$CURL_BIN" --disable --noproxy '*' --fail --silent --show-error \
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--connect-timeout 1 --max-time 3 \
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--resolve "${GITEA_HOST}:443:127.0.0.1" \
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"https://${GITEA_HOST}/api/healthz" >"$GITEA_HEALTH" 2>/dev/null &&
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check_gitea_health 2>/dev/null; then
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return 0
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fi
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(( attempt < 12 )) && "$SLEEP_BIN" 1
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done
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return 1
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}
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rollback() {
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local restore_rc=0
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set +e
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printf '\nROLLBACK: restoring %s\n' "$backup" >&2
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"$INSTALL_BIN" -o root -g root -m 0644 "$backup" "$ACTIVE" || restore_rc=1
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"$NGINX_BIN" -t || restore_rc=1
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if (( restore_rc == 0 )); then
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"$SYSTEMCTL_BIN" reload nginx || restore_rc=1
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"$SYSTEMCTL_BIN" is-active --quiet nginx || restore_rc=1
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wait_for_rollback_state || restore_rc=1
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fi
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if (( restore_rc == 0 )); then
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rollback_armed=0
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printf 'ROLLBACK complete. The Gitea proxy and static Keycloak hold were restored.\n' >&2
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else
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printf 'CRITICAL: automatic rollback failed; backup remains at %s\n' \
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"$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" "$CANDIDATE_SNAPSHOT"
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readonly CANDIDATE_SHA256="$(
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"$SHA256SUM_BIN" "$CANDIDATE_SNAPSHOT" | "$AWK_BIN" '{print $1}'
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)"
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readonly ACTIVE_SHA256="$(
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"$SHA256SUM_BIN" "$ACTIVE" | "$AWK_BIN" '{print $1}'
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)"
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[[ "$CANDIDATE_SHA256" == "$EXPECTED_CANDIDATE_SHA256" ]] || \
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fail "candidate digest changed: ${CANDIDATE_SHA256}"
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if [[ "$ACTIVE_SHA256" != "$EXPECTED_PRE_CUTOVER_SHA256" &&
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"$ACTIVE_SHA256" != "$CANDIDATE_SHA256" ]]; then
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fail "active config has an unexpected digest: ${ACTIVE_SHA256}"
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fi
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pre_cutover_checks
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"$NGINX_BIN" -t
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post_cutover_checks() {
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local host
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local redirect_result
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wait_for_proxy_state || fail "Gitea and Keycloak HTTPS proxies did not converge"
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for host in "$GITEA_HOST" "$KEYCLOAK_HOST"; do
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redirect_result="$(
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"$CURL_BIN" --disable --noproxy '*' --silent --show-error --max-time 10 \
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--resolve "${host}:80:127.0.0.1" \
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--output /dev/null \
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--write-out $'%{http_code}\n%{redirect_url}' \
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"http://${host}/"
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)"
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[[ "$redirect_result" == $'301\nhttps://'"${host}/" ]] || \
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fail "${host} HTTP redirect check failed: ${redirect_result}"
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done
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"$CURL_BIN" --disable --noproxy '*' --fail --silent --show-error --max-time 10 \
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--resolve "${GITEA_HOST}:443:127.0.0.1" \
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--dump-header "$LOGIN_HEADERS" --output /dev/null \
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"https://${GITEA_HOST}/user/login"
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"$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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' "$LOGIN_HEADERS" || fail "Gitea login cookie Secure check failed"
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if "$CURL_BIN" --disable --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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}
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if [[ "$ACTIVE_SHA256" == "$CANDIDATE_SHA256" ]]; then
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post_cutover_checks
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printf 'The reviewed Keycloak 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="${ACTIVE}.before-keycloak-$("$DATE_BIN" +%Y%m%d%H%M%S)"
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[[ ! -e "$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 expose Keycloak through Host Nginx: '
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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 $1}')" == \
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"$ACTIVE_SHA256" ]] || 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 $1}')" == \
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"$CANDIDATE_SHA256" ]] || fail "installed digest mismatch"
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"$NGINX_BIN" -t
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"$SYSTEMCTL_BIN" reload nginx
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"$SYSTEMCTL_BIN" is-active --quiet nginx
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post_cutover_checks
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rollback_armed=0
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printf '\nKEYCLOAK CUTOVER SUCCESS\n'
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printf 'Backup: %s\n' "$backup"
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printf 'Candidate SHA-256: %s\n' "$CANDIDATE_SHA256"
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printf 'Gitea health, Keycloak discovery issuer, HTTPS cookies, redirects, and unknown-host rejection: PASS\n'
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