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Merge pull request #58 from pamelafox/entra-bicep
Port from passwords to passwordless (Entra) auth
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,60 @@ | ||
import logging | ||
import os | ||
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import psycopg2 | ||
from azure.identity import DefaultAzureCredential | ||
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logger = logging.getLogger("scripts") | ||
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def assign_role_for_webapp(postgres_host, postgres_username, app_identity_name): | ||
if not postgres_host.endswith(".database.azure.com"): | ||
logger.info("This script is intended to be used with Azure Database for PostgreSQL.") | ||
logger.info("Please set the environment variable DBHOST to the Azure Database for PostgreSQL server hostname.") | ||
return | ||
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logger.info("Authenticating to Azure Database for PostgreSQL using Azure Identity...") | ||
azure_credential = DefaultAzureCredential() | ||
token = azure_credential.get_token("https://ossrdbms-aad.database.windows.net/.default") | ||
conn = psycopg2.connect( | ||
database="postgres", # You must connect to postgres database when assigning roles | ||
user=postgres_username, | ||
password=token.token, | ||
host=postgres_host, | ||
sslmode="require", | ||
) | ||
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conn.autocommit = True | ||
cur = conn.cursor() | ||
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cur.execute(f"select * from pgaadauth_list_principals(false) WHERE rolname = '{app_identity_name}'") | ||
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# count number of rows in cur | ||
if len(cur.fetchall()) == 1: | ||
logger.info(f"Found an existing PostgreSQL role for identity {app_identity_name}") | ||
else: | ||
logger.info(f"Creating a PostgreSQL role for identity {app_identity_name}") | ||
cur.execute(f"SELECT * FROM pgaadauth_create_principal('{app_identity_name}', false, false)") | ||
logger.info(f"Granting permissions to {app_identity_name}") | ||
cur.execute(f'GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO "{app_identity_name}"') | ||
cur.execute( | ||
f"ALTER DEFAULT PRIVILEGES IN SCHEMA public " | ||
f'GRANT SELECT, UPDATE, INSERT, DELETE ON TABLES TO "{app_identity_name}"' | ||
) | ||
cur.close() | ||
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if __name__ == "__main__": | ||
logging.basicConfig(level=logging.WARNING) | ||
logger.setLevel(logging.INFO) | ||
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POSTGRES_HOST = os.getenv("POSTGRES_DOMAIN_NAME") | ||
POSTGRES_USERNAME = os.getenv("POSTGRES_ADMIN_USERNAME") | ||
APP_IDENTITY_NAME = os.getenv("WEB_APP_NAME") | ||
if not POSTGRES_HOST or not POSTGRES_USERNAME or not APP_IDENTITY_NAME: | ||
logger.error( | ||
"Can't find POSTGRES_DOMAIN_NAME, POSTGRES_ADMIN_USERNAME, and WEB_APP_NAME environment variables. " | ||
"Make sure you run azd up first." | ||
) | ||
else: | ||
assign_role_for_webapp(POSTGRES_HOST, POSTGRES_USERNAME, APP_IDENTITY_NAME) |
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#!/bin/sh | ||
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while IFS='=' read -r key value; do | ||
value=$(echo "$value" | sed 's/^"//' | sed 's/"$//') | ||
export "$key=$value" | ||
done <<EOF | ||
$(azd env get-values) | ||
EOF | ||
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python ./scripts/assign_role.py |
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Original file line number | Diff line number | Diff line change |
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@@ -1,16 +1,20 @@ | ||
import os | ||
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from azure.identity import DefaultAzureCredential | ||
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DEBUG = False | ||
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if "WEBSITE_HOSTNAME" in os.environ: | ||
ALLOWED_HOSTS = [os.environ["WEBSITE_HOSTNAME"]] | ||
else: | ||
ALLOWED_HOSTS = [] | ||
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# Configure Postgres database; the full username for PostgreSQL flexible server is | ||
# username (not @sever-name). | ||
dbuser = os.environ["DBUSER"] | ||
dbpass = os.environ["DBPASS"] | ||
azure_credential = DefaultAzureCredential() | ||
dbpass = azure_credential.get_token("https://ossrdbms-aad.database.windows.net/.default").token | ||
dbhost = os.environ["DBHOST"] + ".postgres.database.azure.com" | ||
dbname = os.environ["DBNAME"] | ||
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DATABASE_URI = f"postgresql+psycopg2://{dbuser}:{dbpass}@{dbhost}/{dbname}" | ||
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# TODO: SSL not needed? |
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Original file line number | Diff line number | Diff line change |
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@@ -5,3 +5,4 @@ psycopg2-binary==2.9.9 | |
python-dotenv==1.0.1 | ||
SQLAlchemy==2.0.29 | ||
gunicorn==21.2.0 | ||
azure-identity==1.16.0 |