Build 060.30: finalize Market Data Acquisition documentation

infra/docker/postgres/Dockerfile

@@ -0,0 +1,9 @@
+FROM postgres:16.14-alpine@sha256:57c72fd2a128e416c7fcc499958864df5301e940bca0a56f58fddf30ffc07777
+
+COPY --chmod=0555 \
+    infra/docker/postgres/init-application-role.sh \
+    /docker-entrypoint-initdb.d/20-init-application-role.sh
+
+COPY --chmod=0555 \
+    infra/docker/postgres/healthcheck-application-role.sh \
+    /usr/local/bin/dzentra-postgres-healthcheck

infra/docker/postgres/healthcheck-application-role.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+
+set -eu
+
+
+role_status="$(
+    psql \
+        --no-psqlrc \
+        --set ON_ERROR_STOP=1 \
+        --tuples-only \
+        --no-align \
+        --username "$POSTGRES_USER" \
+        --dbname "$POSTGRES_DB" <<'SQL'
+\getenv app_user APP_DB_USER
+
+SELECT CASE
+    WHEN :'app_user' <> current_user
+        AND EXISTS (
+            SELECT 1
+            FROM pg_catalog.pg_roles
+            WHERE rolname = :'app_user'
+                AND rolcanlogin
+                AND NOT rolsuper
+                AND NOT rolcreatedb
+                AND NOT rolcreaterole
+                AND rolinherit
+                AND NOT rolreplication
+                AND NOT rolbypassrls
+        )
+        AND pg_catalog.pg_get_userbyid((
+            SELECT datdba
+            FROM pg_catalog.pg_database
+            WHERE datname = current_database()
+        )) = :'app_user'
+        AND NOT EXISTS (
+            SELECT 1
+            FROM pg_catalog.pg_auth_members AS membership
+            JOIN pg_catalog.pg_roles AS member_role
+                ON member_role.oid = membership.member
+            WHERE member_role.rolname = :'app_user'
+        )
+    THEN 1
+    ELSE 0
+END;
+SQL
+)"
+
+test "$role_status" = "1"

infra/docker/postgres/init-application-role.sh

@@ -0,0 +1,130 @@
+#!/bin/sh
+
+set -eu
+
+
+read_secret_file() {
+    secret_path=$1
+
+    if [ ! -r "$secret_path" ]; then
+        echo "Не удалось прочитать обязательный PostgreSQL secret file" >&2
+        return 1
+    fi
+
+    # Маркер сохраняет переводы строк внутри command substitution.
+    secret_with_marker="$(cat "$secret_path"; printf '\001')"
+    secret=${secret_with_marker%?}
+    carriage_return="$(printf '\r')"
+    newline='
+'
+
+    case "$secret" in
+        *"${carriage_return}${newline}")
+            secret=${secret%"${carriage_return}${newline}"}
+            ;;
+        *"${newline}")
+            secret=${secret%"${newline}"}
+            ;;
+        *"${carriage_return}")
+            secret=${secret%"${carriage_return}"}
+            ;;
+    esac
+
+    if [ -z "$(printf '%s' "$secret" | tr -d '[:space:]')" ]; then
+        echo "PostgreSQL secret file содержит пустое значение" >&2
+        return 1
+    fi
+
+    printf '%s' "$secret"
+}
+
+
+if [ -z "${APP_DB_USER:-}" ]; then
+    echo "APP_DB_USER должен содержать имя роли приложения" >&2
+    exit 1
+fi
+
+if [ "$APP_DB_USER" = "$POSTGRES_USER" ]; then
+    echo "APP_DB_USER не должен совпадать с PostgreSQL admin role" >&2
+    exit 1
+fi
+
+app_db_password="$(read_secret_file /run/secrets/db_password)"
+
+# Официальный entrypoint уже прочитал secret file и применил собственную
+# нормализацию конечных переводов строк. Сравниваем именно фактический пароль.
+if [ -z "$(printf '%s' "${POSTGRES_PASSWORD:-}" | tr -d '[:space:]')" ]; then
+    echo "POSTGRES_PASSWORD должен содержать пароль admin role" >&2
+    exit 1
+fi
+
+postgres_admin_password=$POSTGRES_PASSWORD
+
+if [ "$app_db_password" = "$postgres_admin_password" ]; then
+    echo "Пароли PostgreSQL admin и application roles должны различаться" >&2
+    exit 1
+fi
+
+export DZENTRA_APP_DB_PASSWORD="$app_db_password"
+
+psql \
+    --no-psqlrc \
+    --single-transaction \
+    --set ON_ERROR_STOP=1 \
+    --username "$POSTGRES_USER" \
+    --dbname "$POSTGRES_DB" <<'SQL'
+\getenv app_user APP_DB_USER
+\getenv app_password DZENTRA_APP_DB_PASSWORD
+
+SELECT format(
+    'CREATE ROLE %I LOGIN PASSWORD %L NOSUPERUSER NOCREATEDB '
+    'NOCREATEROLE INHERIT NOREPLICATION NOBYPASSRLS',
+    :'app_user',
+    :'app_password'
+)
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM pg_catalog.pg_roles
+    WHERE rolname = :'app_user'
+)
+\gexec
+
+SELECT format(
+    'ALTER ROLE %I WITH LOGIN PASSWORD %L NOSUPERUSER NOCREATEDB '
+    'NOCREATEROLE INHERIT NOREPLICATION NOBYPASSRLS',
+    :'app_user',
+    :'app_password'
+)
+\gexec
+
+SELECT format(
+    'ALTER DATABASE %I OWNER TO %I',
+    current_database(),
+    :'app_user'
+)
+\gexec
+
+SELECT format(
+    'REVOKE ALL ON DATABASE %I FROM PUBLIC',
+    current_database()
+)
+\gexec
+
+SELECT format(
+    'GRANT CONNECT, TEMPORARY ON DATABASE %I TO %I',
+    current_database(),
+    :'app_user'
+)
+\gexec
+
+REVOKE CREATE ON SCHEMA public FROM PUBLIC;
+SELECT format(
+    'GRANT USAGE, CREATE ON SCHEMA public TO %I',
+    :'app_user'
+)
+\gexec
+SQL
+
+unset DZENTRA_APP_DB_PASSWORD
+unset app_db_password
+unset postgres_admin_password