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01-19-2017
3666
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626
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368
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My Accepted Solutions
| Title | Views | Posted |
|---|---|---|
| 260 | 03-05-2025 01:34 PM | |
| 166 | 03-03-2025 01:09 PM | |
| 122 | 03-02-2025 07:19 AM | |
| 553 | 12-22-2024 07:33 AM | |
| 348 | 12-18-2024 12:21 PM |
03-17-2025
10:18 AM
@AllIsWell Somehow I feel you have some stale data. Before deleting the process group, fetch its current state using the API to confirm the correct version number curl -k -X GET "https://localhost:28443/nifi-api/process-groups/836e216e-0195-1000-d3b8-771b257f1fe6" \ -H "Authorization: Bearer Token" Look for the revision object in the response. The version field should match what you include in your DELETE request. Update the DELETE Request If the version in the response is not 0, update your DELETE request with the correct version. For example, if the current version is 5, your request should look like this: curl -k -X DELETE "https://localhost:28443/nifi-api/process-groups/836e216e-0195-1000-d3b8-771b257f1fe6" \ -H "Content-Type: application/json" \ -H "Authorization: Bearer Token" \ --data '{ "revision": { "version": <Value from above> }, "disconnectedNodeAcknowledged": false }' Validate the JSON: Ensure that the JSON payload is valid. You can use tools like JSONLint to validate the structure. Check for Trailing Slashes: Ensure there are no trailing slashes in the URL. For example, use https://localhost:28443/nifi-api/process-groups/836e216e-0195-1000-d3b8-771b257f1fe6 instead of https://localhost:28443/nifi-api/process-groups/836e216e-0195-1000-d3b8-771b257f1fe6/. Disconnected Node Acknowledgment: If your NiFi cluster has disconnected nodes, you may need to set disconnectedNodeAcknowledged to true Final Notes: If the issue persists, double-check the API documentation for any changes or additional requirements. Ensure that the Authorization token is valid and has the necessary permissions to delete the process group. If you are using a NiFi version older than 1.12.0, the API behavior might differ slightly, so consult the documentation for your specific version. Happy hadooping
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03-11-2025
04:16 PM
@Ytch Can you try this solution that has been accepted in this forum MSSQL to PostgreSQL happy hadooping
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03-09-2025
05:25 AM
@zeeshanmcs It seem you're having an issue with unavailable tablets in your Kudu table, which is preventing Spark from inserting data. The output from kudu cluster ksck clearly shows the problem: the leader replicas for all tablets in the impala::mrs.NumberofSubs table are on a tablet server that's unavailable. The key issue is that the tablet server with ID 24483fcd36ce45d78d80beb04b3b0cf4 is not running, and it happens to be the leader for all 7 tablets in your table. Here's a solution to resolve this issue: 1. First, check the status of all Kudu tablet servers sudo systemctl status kudu-tserver 2. Look specifically for the tablet server with ID 24483fcd36ce45d78d80beb04b3b0cf4 sudo -u kudu kudu tserver list tstewputil1 3. If the tablet server is down, start it. sudo systemctl start kudu-tserver 4. If the tablet server is running but not responding, restart it sudo systemctl restart kudu-tserver 5. After restarting the tablet server, wait a few minutes for it to rejoin the cluster and for leadership transitions to occur, then check the status again sudo -u kudu kudu cluster ksck tstewputil1 If the tablet server is permanently lost or damaged, you'll need to recover the tablets a. Check if you have enough replicas (you should have at least 3 for production) sudo -u kudu kudu table describe impala::mrs.NumberofSubs tstewputil1 b. If you have other healthy replicas, you can delete the failed server from the cluster and Kudu will automatically recover sudo -u kudu kudu tserver delete tstewputil1 <tablet_server_uuid> c. If this is the only replica and you don't have backups, you may need to: Create a new table with the same schema Load data from your source systems Or restore from a backup if available If, after restarting, you still have issues, the problem might be: Disk space issues on the tablet server Configuration problems Network connectivity problems between servers Check the Kudu tablet server logs for more details less /var/log/kudu/kudu-tserver.log Once the tablet server is back online and healthy, your Spark job should be able to insert data into the table successfully Happy hadooping
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03-07-2025
03:24 PM
@Maulz Connecting Python to Cloudera, Hive, and Hue involves using libraries and drivers that interface with HiveServer2 the service that allows remote clients to execute Hive queries.There are several methods to connect Python to Cloudera's ecosystem, particularly to access Hive tables through Hue. I'll detail the most common approaches. Prerequisites Cloudera/Hadoop Cluster: Ensure HiveServer2 is running on your cluster. Default HiveServer2 port: 10000 (verify via Cloudera Manager). Python Environment: Python 3.6+ installed. Authentication: Know your authentication method: Username/password (non-secure). Kerberos (common in enterprise clusters). LDAP. Below is a detailed, step-by-step guide: 2. Install Required Python Libraries Use pip to install: pip install pyhive # Python interface for Hive pip install thrift # Thrift protocol support pip install sasl # SASL authentication (for Kerberos) pip install thrift-sasl # SASL wrapper for Thrift pip install pykerberos # Kerberos support (if needed) For JDBC-based connections (alternative method): pip install JayDeBeApi # JDBC bridge 3. Configure Cloudera/Hive Via Cloudera Manager: Enable HiveServer2 and ensure it’s running. Check HiveServer2 Port (default: 10000). If using Kerberos: Ensure Kerberos is configured in Cloudera. Export your Kerberos keytab kinit -kt <keytab_file> <principal> Connecting Python to Cloudera/Hue/Hive 1.Using PyHive it's a Python library specifically designed to work with Hive from pyhive import hive # Connect to Hive server conn = hive.Connection( host='cloudera_host_name', port=10000, # Default HiveServer2 port username='your_username', password='your_password', database='default', # Your database name auth='LDAP' # Or 'NONE', 'KERBEROS', 'CUSTOM' depending on your authentication setup ) # Create a cursor cursor = conn.cursor() # Execute a query cursor.execute('SELECT * FROM your_table LIMIT 10') # Fetch results results = cursor.fetchall() print(results) # Close connections cursor.close() conn.close() 2. Using the Impala Connection If your Cloudera cluster uses Impala: from impala.dbapi import connect conn = connect( host='cloudera_host_name', port=21050, # Default Impala port user='your_username', password='your_password', database='default' # Your database name ) cursor = conn.cursor() cursor.execute('SELECT * FROM your_table LIMIT 10') results = cursor.fetchall() print(results) cursor.close() conn.close() 3. Integration with Hue Hue is a web UI for Hadoop, but you can programmatically interact with Hive via its APIs (limited). For direct Python-Hue integration: Use Hue’s REST API to execute queries: import requests # Hue API endpoint (replace with your Hue server URL) url = "http://<hue_server>:8888/hue/notebook/api/execute/hive" headers = {"Content-Type": "application/json"} data = { "script": "SELECT * FROM my_table", "dialect": "hive" } response = requests.post( url, auth=('<hue_username>', '<hue_password>'), headers=headers, json=data ) print(response.json()) Troubleshooting Common Issues: Connection Refused: Verify HiveServer2 is running (netstat -tuln | grep 10000). Check firewall rules. Authentication Failures: For Kerberos: Ensure kinit succeeded. For LDAP: Validate credentials. Thrift Version Mismatch: Use Thrift v0.13.0 with Hive 3.x. Logs: Check HiveServer2 logs in Cloudera Manager (/var/log/hive). 4. Best Practices Use connection pooling for high-frequency queries. For Kerberos, automate ticket renewal with kinit cron jobs. Secure credentials using environment variables or Vault. Happy hadooping
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03-05-2025
01:34 PM
2 Kudos
@pavanshettyg5 The TLS implementation for NiFi requires proper configuration of both keystore and truststore your organization's signed certificate with SAN entries to enable secure HTTPS access. Based on your description, you've received a signed certificate (nifi.crt) but are experiencing issues with the complete TLS setup. Required Certificates & Files Certificate Authority (CA) Certificate: The root certificate from your signing authority Truststore: Contains the Certificate Authority (CA) root/intermediate certificates that signed your NiFi certificate (for mutual TLS or cluster communication). Signed Certificate (nifi.crt): Your domain certificate with the SAN entries Private Key: The private key used to generate the CSR 1. Prepare Certificate Files Ensure you have: The signed certificate (nifi.crt) Your private key The CA certificate (request from your CA if not available) Problem 1: Missing Private Key or Certificate Chain If you only have nifi.crt, you must also have: The private key (e.g. nifi.key) generated during the CSR process. The CA root/intermediate certificates (if your organization uses a private CA). Problem 2: Improper Keystore/Truststore Format NiFi uses Java KeyStores (JKS or PKCS12). Ensure your keystore/truststore is in the correct format. If your organization uses OpenSSL-based tools, convert the PEM files (nifi.crt + nifi.key + CA chain) into a PKCS12/JKS keystore. Problem 3: SAN Entries Not Recognized Verify the SAN entries in your certificate match the NiFi node hostnames (e.g. nifinode1.x.x.net). Use openssl x509 -in nifi.crt -text -noout to check SANs. 3. Step-by-Step Solution A. Prepare the Keystore Combine Certificate and Private Key: If you have nifi.crt and nifi.key, create a PKCS12 keystore: openssl pkcs12 -export \ -in nifi.crt \ -inkey nifi.key \ -chain -CAfile ca_chain.crt \ # Include CA chain if needed -name "nifi" \ -out nifi-keystore.p12 -password pass:keystorepassword Use a password (e.g., keystorePassword). 2. Convert to JKS (if required) Java Keystore from PKCS12 keytool -importkeystore \ -srckeystore nifi-keystore.p12 \ -srcstoretype PKCS12 \ -destkeystore nifi-keystore.jks \ -deststoretype JKS B. Prepare the Truststore Import CA Certificates: If your organization uses a private CA, add its root/intermediate certificates to the truststore keytool -import -trustcacerts \ -alias ca-root \ -file ca_root.crt \ -keystore nifi-truststore.jks C. Configure NiFi Update nifi.properties # HTTPS Settings nifi.web.https.host=0.0.0.0 nifi.web.https.port=9443 nifi.web.https.network.interface.default= # Security Properties # nifi.security.keystore=/path/to/keystore.jks nifi.security.keystoreType=JKS nifi.security.keystorePasswd=keystorepassword nifi.security.keyPasswd=keystorepassword nifi.security.truststore=/path/to/truststore.jks nifi.security.truststoreType=JKS nifi.security.truststorePasswd=truststorepassword # Truststore (required for cluster nodes/ZooKeeper) nifi.security.truststore=./nifi-truststore.jks nifi.security.truststoreType=JKS nifi.security.truststorePasswd=truststorePassword # Enable TLS for cluster nodes nifi.cluster.protocol.is.secure=true nifi.web.http.port= nifi.web.https.port=9443 nifi.zookeeper.connect.string=zookeepernode1.x.x.net:2181,zookeepernode2.x.x.net:2181,zookeepernode3.x.x.net:2181 nifi.zookeeper.client.secure=true 2. Updateauthorizers.xml (for mutual TLS): Configure for Cluster Communication Configure authorizers.xml and nifi-registry.properties for secure cluster communication using the same certificates. <property name="Initial Admin Identity">CN=admin, OU=YourOrg</property> <property name="Node Identity 1">CN=nifinode1.x.x.net, OU=YourOrg</property> D. Validate the Setup After configuration Test Keystore/Truststore: # Verify keystore contents keytool -list -v -keystore keystore.jks -storepass keystorepassword # Verify truststore contents keytool -list -v -keystore truststore.jks -storepass truststorepassword # Test SSL configuration openssl s_client -connect nifi-dev.x.x.net:9443 -showcerts Troubleshooting Common Issues Certificate Chain Issues: Ensure your keystore includes the full certificate chain # Concatenate certificates if needed cat nifi.crt intermediate.crt root.crt > fullchain.crt SAN Validation: Verify certificate has correct SAN entries openssl x509 -in nifi.crt -text -noout | grep -A1 "Subject Alternative Name" Java Compatibility: Ensure Java version compatibility with TLS # Add to bootstrap.conf if using older Java versions java.arg.16=-Dhttps.protocols=TLSv1.2 Cluster Communication: Set proper node identities for cluster # In nifi.properties nifi.cluster.node.address=nifinode1.x.x.net nifi.cluster.node.protocol.port=11443 nifi.remote.input.secure=true ZooKeeper Security: Only if using secure ZooKeeper connections # In zookeeper.properties secureClientPort=2281 serverCnxnFactory=org.apache.zookeeper.server.NettyServerCnxnFactory ssl.keyStore.location=/path/to/keystore.jks ssl.keyStore.password=keystorepassword ssl.trustStore.location=/path/to/truststore.jks ssl.trustStore.password=truststorepassword Verify HTTPS Access: Access https://nifi-dev.x.x.net:9443/nifi in a browser. Use curl -vk https://nifi-dev.x.x.net:9443/nifi to debug TLS handshake errors. 2. Troubleshooting "SSL Peer Unauthenticated": Ensure the truststore contains the CA certificate that signed the NiFi certificate. "Certificate Doesn't Match Hostname": Verify SAN entries in nifi.crt include all NiFi node hostnames. Keystore Password Mismatch: Ensure nifi.security.keystorePasswd and nifi.security.keyPasswd match in nifi.properties. Additional Recommendations Use strong, unique passwords for keystores and truststores Implement proper certificate rotation procedures Consider automating certificate management with tools like cert-manager Implement client certificate authentication for additional security Ensure proper DNS resolution for all SAN entries By following the above steps, you’ll enable HTTPS for NiFi with proper SAN support and resolve keystore/truststore issues Happy hadooping
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03-05-2025
10:30 AM
@Rich_Learner To resolve the issue where the ttype column returns NULL and subclasses' values aren't being parsed correctly, follow these steps: 1. Case Sensitivity in JSON Paths The JSON keys Type and ProductCOde use uppercase letters. Correct the paths in get_json_object to match the exact case: Use '$.Type' instead of '$.type'. Ensure '$.ProductCOde' matches the case in the JSON (if it's a typo, adjust accordingly). 2. Properly Handle Nested Arrays Avoid flattening both the outer products array and inner Offer array into the same lateral view. Use separate lateral views for each array level. Corrected Code WITH product AS ( SELECT xml_data, GET_JSON_OBJECT(xml_data, '$.Customer.CustomerId') AS applicationid, -- Extract products array as a JSON string GET_JSON_OBJECT(xml_data, '$.Customer.products') AS products_json FROM Custome_info ), -- Explode the products array exploded_products AS ( SELECT applicationid, product_item FROM product LATERAL VIEW OUTER EXPLODE( SPLIT( REGEXP_REPLACE( REGEXP_REPLACE(products_json, '^\\[|\\]$', ''), -- Remove outer brackets '\\}\\,\\{', '\\}\\;\\{' -- Split products ), ';' ) ) p AS product_item ), -- Explode the Offer array within each product exploded_offers AS ( SELECT applicationid, GET_JSON_OBJECT(product_item, '$.ProductCOde') AS ProductCode, GET_JSON_OBJECT(product_item, '$.Type') AS ttype, offer_item FROM exploded_products LATERAL VIEW OUTER EXPLODE( SPLIT( REGEXP_REPLACE( REGEXP_REPLACE( GET_JSON_OBJECT(product_item, '$.Offer'), '^\\[|\\]$', '' -- Remove inner Offer brackets ), '\\}\\,\\{', '\\}\\;\\{' -- Split Offer items ), ';' ) ) o AS offer_item ) -- Combine results (products and their offers) SELECT applicationid, COALESCE( GET_JSON_OBJECT(offer_item, '$.ProductCOde'), -- Offer-level ProductCode ProductCode -- Product-level ProductCode ) AS ProductCode, COALESCE( GET_JSON_OBJECT(offer_item, '$.Type'), -- Offer-level Type ttype -- Product-level Type ) AS ttype FROM exploded_offers; Explanation Case Sensitivity Fix: Using '$.Type' ensures the correct extraction of the Type field from the JSON. Nested Array Handling: First, explode the products array to get individual product objects. Then, explode the Offer array within each product to access sub-offer details. Combined Results: Use COALESCE to merge product-level and offer-level values into a single output, ensuring both levels are represented. Expected Output ApplicationID | ProductCode | ttype 19900101 | ABC | C1 19900101 | A1 | CBA 19900101 | A2 | DBA 19900101 | A3 | BBA 19900101 | XYZ | C2 19900101 | B1 | BBA 19900101 | B2 | BBA Happy hadooping
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03-03-2025
01:09 PM
@pavanshettyg5 But looking at the error messages when running zkServer.sh status on the ZooKeeper nodes: on zookeepernode1 and 2, there's a message: "Client port not found in static config file. Looking in dynamic config file." Then a grep error: "grep: : No such file or directory". This suggests that the static zoo.cfg is missing the clientPort entry, and the dynamic configuration file (which is probably specified via dynamicConfigFile in zoo.cfg) is either not present or misconfigured. To resolve the ZooKeeper and NiFi connectivity issues, follow these steps and hopefully that will resolve your nifi connectivity issue Step 1: Configure ZooKeeper to Bind to All Interfaces Problem: ZooKeeper nodes are binding to localhost, preventing remote connections from NiFi. Fix: Update zoo.cfg on each ZooKeeper node to bind to 0..0.0.0 (all interfaces). 1. Edit zoo.cfg on each ZooKeeper node: vi /opt/zookeeper/conf/zoo.cfg 2. Add/Modify these lines clientPort=2181 clientPortAddress=0.0.0.0 3. Restart ZooKeeper on each node: /opt/zookeeper/bin/zkServer.sh restart Step 2: Verify ZooKeeper Configuration After restarting, check the status /opt/zookeeper/bin/zkServer.sh status Expected Output: Client address: 0.0.0.0(not localhost). One node should beleader, others follower. Step 3: Check ZooKeeper Network Connectivity From NiFi nodes, test connectivity to ZooKeeper: telnet zookeepernode1 2181 telnet zookeepernode2 2181 telnet zookeepernode3 2181 If connections fail, check firewalls/security groups to allow traffic on port 2181. Step 4: Validate ZooKeeper Dynamic Configuration (If Applicable) If using dynamic reconfiguration: 1. Ensure the dynamic config file (e.g., zoo_dynamic.cfg) has entries like server.1=zookeepernode1:2888:3888:participant;zookeepernode1:2181 server.2=zookeepernode2:2888:3888:participant;zookeepernode2:2181 server.3=zookeepernode3:2888:3888:participant;zookeepernode3:2181 2. Confirm the static zoo.cfg references the dynamic file: dynamicConfigFile=/opt/zookeeper/conf/zoo_dynamic.cfg Step 5: Verify NiFi Configuration Ensure nifi.properties points to the correct ZooKeeper ensemble: nifi.zookeeper.connect.string=zookeepernode1:2181,zookeepernode2:2181,zookeepernode3:2181 Step 6: Restart NiFi Services Restart NiFi on all nodes: /opt/nifi/bin/nifi.sh restart Check logs for successful connections: tail -f /opt/nifi/logs/nifi-app.log Troubleshooting Summary ZooKeeper Binding: Ensure ZooKeeper listens on 0.0.0.0:2181, not localhost. Firewall Rules: Allow traffic between NiFi and ZooKeeper nodes on ports 2181, 2888, and 3888. Hostname Resolution: Confirm zookeepernode1, zookeepernode2, and zookeepernode3 resolve to correct IPs on NiFi nodes. By addressing ZooKeeper's binding configuration and network accessibility, NiFi should successfully connect to the ZooKeeper cluster. Happy hadooping
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03-02-2025
07:19 AM
@drewski7 The error message says there's no EntityManager with an actual transaction available. That suggests that the code trying to persist the user isn't running within a transactional context. In Spring applications, methods that modify the database usually need to be annotated with `@Transactional` to ensure they run within a transaction. Looking at the stack trace, the error occurs in `XUserMgr$ExternalUserCreator.createExternalUser`, which calls `UserMgr.createUser`, which in turn uses `BaseDao.create`. The `create` method in `BaseDao` is trying to persist an entity but there's no active transaction. So maybe the `createUser` method or the code calling it isn't properly transactional. In version 2.4.0, this worked, so something must have changed in 2.5.0. Perhaps the upgrade introduced changes in how transactions are managed. Maybe a method that was previously transactional no longer is, or the transaction boundaries have shifted. Step 1: Verify Database Schema Compatibility Ranger 2.5.0 may require schema updates. Ensure the database schema is compatible with the new version: Check Upgrade Documentation: Review the Ranger 2.5.0 Release Notes for required schema changes. Example: If migrating from 2.4.0 to 2.5.0, you may need to run SQL scripts like x_portal_user_DDL.sql or apache-ranger-2.5.0-schema-upgrade.sql. Run Schema Upgrade Scripts: Locate the schema upgrade scripts in the Ranger installation directory (ranger-admin/db/mysql/patches) and apply them: mysql -u root -p ranger < apache-ranger-2.5.0-schema-upgrade.sql Validate the Schema: Confirm that the x_portal_user table exists and has the expected columns (e.g., login_id, user_role). Step 2: Check Transaction Management Configuration The error suggests a missing @Transactional annotation or misconfigured transaction manager in Ranger 2.5.0: Review Code/Configuration Changes: Compare the transaction management configurations between Ranger 2.4.0 and 2.5.0. Key files: ranger-admin/ews/webapp/WEB-INF/classes/conf/application.properties ranger-admin/ews/webapp/WEB-INF/classes/spring-beans.xml Apache Ranger JIRA: Search for issues like RANGER-XXXX related to transaction management in Ranger 2.5.0. Ensure Transactional Annotations: In Ranger 2.5.0, the method createUser in UserMgr.java or its caller must be annotated with @Transactional to ensure database operations run in a transaction. @Transactional public void createUser(...) { ... } 3. Debug Transaction Boundaries: Enable transaction logging in log4j.properties to trace transaction activity log4j.logger.org.springframework.transaction=DEBUG log4j.logger.org.springframework.orm.jpa=DEBUG Step 3: Manually Create the User (Temporary Workaround) If the user drew.nicolette is missing from x_portal_user, manually insert it into the database: INSERT INTO x_portal_user (login_id, password, user_role, status) VALUES ('drew.nicolette', 'LDAP_USER_PASSWORD_HASH_IF_APPLICABLE', 'ROLE_USER', 1); Note: This bypasses the transaction error but is not a permanent fix. Step 4: Verify LDAP Configuration Ensure LDAP settings in ranger-admin/ews/webapp/WEB-INF/classes/conf/ranger-admin-site.xml are correct for Ranger 2.5.0: <property>
<name>ranger.authentication.method</name>
<value>LDAP</value>
</property>
<property>
<name>ranger.ldap.url</name>
<value>ldap://your-ldap-server:389</value>
</property> Step 5: Check for Known Issues Apache Ranger JIRA: Search for issues like RANGER-XXXX related to transaction management in Ranger 2.5.0. 2. Apply Patches: If a patch exists (e.g., for missing @Transactional annotations), apply it to the Ranger 2.5.0 codebase. Step 6: Test with a New User Attempt to log in with a different LDAP user to see if the issue is specific to drew.nicolette or a systemic problem. If the error persists for all users, focus on transaction configuration or schema issues. If only drew.nicolette fails, check for conflicts in the x_portal_user table (e.g., duplicate entries). Final Checks Logs: Monitor ranger-admin.log and catalina.out for transaction-related errors after applying fixes. Permissions: Ensure the database user has write access to the x_portal_user table. Dependencies: Confirm that Spring and JPA library versions match Ranger 2.5.0 requirements. Happy hadooping
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03-02-2025
02:31 AM
@rj27 Some clarification on the git setup This is the author name that will appear in commit messages Set the global Git username to "NiFi Registry" This is the email address associated with commits Set the global Git email to "nifi-registry@example.com" Values to be passed <flowPersistenceProvider> <property name="Flow Storage Directory">./flow_storage</property> <property name="Git Remote To Push">origin</property> <property name="Git Remote Access User">username</property> <property name="Git Remote Access Password">password</property> <property name="Remote Clone Repository">https://git-repo-url/your-flow-repo.git</property> </flowPersistenceProvider>
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03-01-2025
11:46 AM
@rj27 To set up Git integration for Apache NiFi Registry using SSH authentication, you need to configure the NiFi Registry to use a Git-based flow persistence provider. Analysis of Current Setup You have Apache NiFi 1.28 running on AWS ECS Fargate You have Apache NiFi Registry 1.28 running on AWS ECS Fargate Both applications are communicating with each other successfully You need to integrate NiFi Registry with Git using SSH authentication Below are the detailed steps to achieve this on an AWS ECS instance running on Fargate with NiFi and NiFi Registry 1.28. Detailed Steps for Git Integration Step 1: Update NiFi Registry Configuration Modify the nifi-registry.properties file in your container Add the following properties to configure the Git flow persistence provider # Git Configuration nifi.registry.db.git.remote=true nifi.registry.db.git.remote.to.push=true nifi.registry.db.git.repository=/opt/nifi-registry/git-repository nifi.registry.db.git.flow.storage.directory=/opt/nifi-registry/flow-storage nifi.registry.db.git.remote.url=ssh://git@your-git-server:port/your-repo.git nifi.registry.db.git.remote.branch=master Step 2: Set Up SSH Keys for Authentication 1. Generate an SSH key pair inside your container mkdir -p /opt/nifi-registry/.ssh ssh-keygen -t rsa -b 4096 -C "nifi-registry@example.com" -f /opt/nifi-registry/.ssh/id_rsa -N "" 2. Add your public key to your Git repository's authorized keys (in GitHub, GitLab, etc.) Copy the contents of /opt/nifi-registry/.ssh/id_rsa.pub Add it to your Git provider as a deploy key or authentication key 3. Configure SSH client in the container cat > /opt/nifi-registry/.ssh/config << EOF Host your-git-server IdentityFile /opt/nifi-registry/.ssh/id_rsa StrictHostKeyChecking no UserKnownHostsFile /dev/null EOF 4. Set proper permissions chmod 700 /opt/nifi-registry/.ssh chmod 600 /opt/nifi-registry/.ssh/id_rsa chmod 644 /opt/nifi-registry/.ssh/id_rsa.pub chmod 600 /opt/nifi-registry/.ssh/config Step 3: Update ECS Task Definition for Persistence 1. Update your ECS task definition to include a volume for SSH keys and Git repository validate the JSON's "volumes": [ { "name": "nifi-registry-git", "dockerVolumeConfiguration": { "scope": "task", "driver": "local", "labels": null, "autoprovision": true } } ] 2. Mount this volume in your container definition "mountPoints": [ { "sourceVolume": "nifi-registry-git", "containerPath": "/opt/nifi-registry/.ssh", "readOnly": false }, { "sourceVolume": "nifi-registry-git", "containerPath": "/opt/nifi-registry/git-repository", "readOnly": false } ] Step 4: Configure Git User Information Set Git user configuration git config --global user.name "NiFi Registry" git config --global user.email "nifi-registry@example.com" Step 5: Initialize the Git Repository Initialize the local Git repository mkdir -p /opt/nifi-registry/git-repository cd /opt/nifi-registry/git-repository git init git remote add origin ssh://git@your-git-server:port/your-repository.git 2. Test the connection ssh -T git@your-git-server Step 6: Configure NiFi to Connect to NiFi Registry In NiFi UI, configure the Registry Client: Click on the hamburger menu (≡) in the top-right corner Select "Controller Settings" Go to the "Registry Clients" tab Add a new Registry Client with: Name: Git-Backed Registry URL: http://your-nifi-registry:18080 Step 7: Restart NiFi Registry Restart the NiFi Registry service to apply change # If using systemd systemctl restart nifi-registry # If using the command line ./bin/nifi-registry.sh restart # In AWS ECS, update the service to force new deployment aws ecs update-service --cluster your-cluster --service your-nifi-registry-service --force-new-deployment Troubleshooting 1. Check NiFi Registry logs for Git-related errors: tail -f /opt/nifi-registry/logs/nifi-registry-app.log 2. Verify SSH connectivity ssh -vT git@your-git-server 3. Common issues: Permission problems: Ensure the NiFi Registry user has appropriate permissions Known hosts: If StrictHostKeyChecking is on, you need to accept the host key first Firewall: Ensure outbound connections to the Git server are allowed from the ECS task Important precautions Security: Ensure the private key is stored securely and not exposed in the container image or logs. Automation: Consider using AWS Secrets Manager or Parameter Store to manage the SSH key and passphrase securely. Backup: Regularly back up your Git repository to avoid data loss. Happy hadooping
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