Migrate to OCI Autonomous Database — wallet setup, mTLS, Data Pump, and python-oracledb.
Use when provisioning Autonomous DB, downloading wallets, or migrating data with Data Pump.
Trigger with "autonomous database", "oci adb", "wallet download", "data pump oci", "mtls oracle".
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Migrate to OCI Autonomous Database — wallet setup, mTLS, Data Pump, and python-oracledb.
Use when provisioning Autonomous DB, downloading wallets, or migrating data with Data Pump.
Trigger with "autonomous database", "oci adb", "wallet download", "data pump oci", "mtls oracle".
allowed-tools
Read, Write, Edit, Bash(pip:*), Grep
version
1.7.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
["saas","oraclecloud","oci"]
compatibility
Designed for Claude Code
OCI Autonomous Database — Migration & Connection
Overview
Migrate to and connect with OCI Autonomous Database (ADB) using the Python SDK and python-oracledb. Autonomous Database is OCI's crown jewel but migrating to it from standard Oracle DB or other databases is full of gotchas — wallet downloads require SDK calls (not just console clicks), mTLS is mandatory by default, connection strings use a different format than standard Oracle, and Data Pump exports need specific parameter adjustments for ADB compatibility.
Purpose: Provision an Autonomous Database, download the wallet, establish a connection, and migrate data using Data Pump.
Prerequisites
OCI Python SDK — pip install oci
Oracle DB driver — pip install oracledb
Config file at ~/.oci/config with fields: user, fingerprint, tenancy, region, key_file
IAM policy — Allow group Developers to manage autonomous-databases in compartment <name>
Python 3.8+
For Data Pump: access to the source Oracle database with DBA privileges
The wallet contains certificates and connection descriptors needed for mTLS. You must download it via the SDK — the wallet password is set at download time, not during provisioning.
# Wait for ADB to become AVAILABLE
waiter = oci.wait_until(
db_client,
db_client.get_autonomous_database(adb.id),
"lifecycle_state",
"AVAILABLE",
max_wait_seconds=600,
)
print(f"ADB ready: {waiter.data.lifecycle_state}")
# Download wallet
wallet_response = db_client.generate_autonomous_database_wallet(
autonomous_database_id=adb.id,
generate_autonomous_database_wallet_details=oci.database.models.GenerateAutonomousDatabaseWalletDetails(
password="WalletP@ss456!", # Wallet password (different from admin)
generate_type="SINGLE", # SINGLE for one DB, ALL for region
),
)
# Save and extract wallet
wallet_dir = os.path.expanduser("~/wallets/appadb")
os.makedirs(wallet_dir, exist_ok=True)
wallet_path = os.path.join(wallet_dir, "wallet.zip")
withopen(wallet_path, "wb") as f:
f.write(wallet_response.data.content)
with zipfile.ZipFile(wallet_path, "r") as z:
z.extractall(wallet_dir)
print(f"Wallet extracted to: {wallet_dir}")
print(f"Files: {os.listdir(wallet_dir)}")
Step 3: Connect Using python-oracledb (Thin Mode)
python-oracledb thin mode does not require Oracle Client libraries. It connects directly using the wallet files.
import oracledb
# Thin mode connection (no Oracle Client needed)
connection = oracledb.connect(
user="ADMIN",
password="SecureP@ss123!",
dsn="appadb_tp", # From tnsnames.ora in wallet (_tp = Transaction Processing)
config_dir=os.path.expanduser("~/wallets/appadb"),
wallet_location=os.path.expanduser("~/wallets/appadb"),
wallet_password="WalletP@ss456!",
)
# Verify connection
cursor = connection.cursor()
cursor.execute("SELECT banner FROM v$version")
print(f"Connected: {cursor.fetchone()[0]}")
# Check ADB-specific info
cursor.execute("SELECT * FROM v$pdbs")
print(f"PDB: {cursor.fetchone()}")
cursor.close()
connection.close()
Step 4: Data Pump Export from Source Database
Data Pump is the standard Oracle tool for bulk data migration. These parameters ensure ADB compatibility.
# On the SOURCE database server# Create a directory object pointing to a dump location
sqlplus sys/password@source_db as sysdba <<EOF
CREATE OR REPLACE DIRECTORY export_dir AS '/tmp/datapump';
GRANT READ, WRITE ON DIRECTORY export_dir TO schema_owner;
EOF# Export with ADB-compatible parameters
expdp schema_owner/password@source_db \
directory=export_dir \
dumpfile=migration_%U.dmp \
logfile=export.log \
schemas=APP_SCHEMA \
exclude=INDEX,CLUSTER,INDEXTYPE,MATERIALIZED_VIEW,MATERIALIZED_VIEW_LOG,MATERIALIZED_ZONEMAP,DB_LINK \
version=19 \
parallel=4
Critical ADB exclusions: ADB manages its own indexes, clusters, and materialized views. Including them causes import failures.
Step 5: Import into Autonomous Database
# Upload dump files to Object Storage first
storage = oci.object_storage.ObjectStorageClient(config)
namespace = storage.get_namespace().data
# Upload dump filewithopen("/tmp/datapump/migration_01.dmp", "rb") as f:
storage.put_object(
namespace_name=namespace,
bucket_name="migration-dumps",
object_name="migration_01.dmp",
put_object_body=f,
)
print("Dump file uploaded to Object Storage")
Then run the import from SQL Developer Web or via credential + DBMS_CLOUD:
-- In ADB SQL worksheet (SQL Developer Web or sqlcl)-- Step 1: Create credential for Object Storage accessBEGIN
DBMS_CLOUD.CREATE_CREDENTIAL(
credential_name =>'OCI_CRED',
username =>'oraclecloud_user@example.com',
password =>'auth_token_from_console'
);
END;
/-- Step 2: Import via Data Pump from Object StorageDECLARE
h NUMBER;
BEGIN
h := DBMS_DATAPUMP.OPEN('IMPORT', 'SCHEMA', NULL, 'MIGRATION_IMPORT');
DBMS_DATAPUMP.ADD_FILE(h, 'migration_01.dmp', 'DATA_PUMP_DIR');
DBMS_DATAPUMP.SET_PARAMETER(h, 'TABLE_EXISTS_ACTION', 'REPLACE');
DBMS_DATAPUMP.START_JOB(h);
END;
/
Step 6: Verify Migration
connection = oracledb.connect(
user="ADMIN",
password="SecureP@ss123!",
dsn="appadb_tp",
config_dir=os.path.expanduser("~/wallets/appadb"),
wallet_location=os.path.expanduser("~/wallets/appadb"),
wallet_password="WalletP@ss456!",
)
cursor = connection.cursor()
# Count tables
cursor.execute("""
SELECT table_name, num_rows
FROM all_tables
WHERE owner = 'APP_SCHEMA'
ORDER BY num_rows DESC
""")
for row in cursor.fetchall():
print(f" {row[0]}: {row[1]} rows")
# Check for invalid objects
cursor.execute("""
SELECT object_name, object_type, status
FROM all_objects
WHERE owner = 'APP_SCHEMA' AND status = 'INVALID'
""")
invalid = cursor.fetchall()
if invalid:
print(f"\nWARNING: {len(invalid)} invalid objects found:")
for obj in invalid:
print(f" {obj[1]}{obj[0]}: {obj[2]}")
else:
print("\nAll objects valid — migration successful")
cursor.close()
connection.close()
Output
Successful completion produces:
A provisioned Autonomous Database with mTLS wallet downloaded and extracted
A working python-oracledb connection in thin mode (no Oracle Client required)
Data Pump export with ADB-compatible exclusions
Object Storage upload and DBMS_CLOUD import workflow
Migration verification with table counts and invalid object checks
Error Handling
Error
Code
Cause
Solution
Wallet download fails
404 NotAuthorizedOrNotFound
ADB not in AVAILABLE state
Wait for provisioning to complete (Step 2)
DPY-6005: cannot connect
N/A
Wrong wallet path or password
Verify config_dir and wallet_location paths, check wallet password
ORA-01017: invalid password
N/A
Wrong admin password
Reset via db_client.update_autonomous_database() with new admin_password
Data Pump ORA-39083
N/A
Unsupported object type in ADB
Add object type to exclude= list in expdp command
Not authenticated
401 NotAuthenticated
Bad API key or config
Verify ~/.oci/config key_file and fingerprint
Rate limited
429 TooManyRequests
Too many API calls
Add backoff; OCI does not return Retry-After header
mTLS handshake failure
N/A CERTIFICATE_VERIFY_FAILED
Expired or wrong wallet certificates
Re-download wallet; check wallet expiry (180 days default)
Examples
Quick ADB list via CLI:
oci db autonomous-database list \
--compartment-id <OCID> \
--query "data[*].{Name:\"display-name\",State:\"lifecycle-state\",OCPUs:\"cpu-core-count\"}" \
--output table
After migration, see oraclecloud-query-transform to set up monitoring alarms on ADB metrics (CPU, storage, session count), or oraclecloud-data-handling to manage Object Storage buckets used for Data Pump dumps.
