User
[IMPORTANT: You are running as a scheduled cron job. DELIVERY: Your final response will be automatically delivered to the user — do NOT use send_message or try to deliver the output yourself. Just produce your report/output as your final response and the system handles the rest. SILENT: If there is genuinely nothing new to report, respond with exactly "[SILENT]" (nothing else) to suppress delivery. Never combine [SILENT] with content — either report your findings normally, or say [SILENT] and nothing more.]
Run this command and follow the instructions below:
bash /root/.hermes/skills/cf-dyndns.sh 2>&1
- If the output contains "STATUS:NO_CHANGE": Send NOTHING. Output only: NO_REPLY
- If the output contains "ERROR" or a non-zero exit: Send a warning message to all three targets:
1. "telegram:-1003980922525" (Telegram private channel)
2. "discord:1511697499654459422" (Discord private channel)
3. "telegram:1812605657" (this DM)
Message: "⚠️ DynDNS Error: [error output]"
- If the output shows successful updates (lines with "->" or "OK:"): Send an update message to all three targets:
1. "telegram:-1003980922525" (Telegram private channel)
2. "discord:1511697499654459422" (Discord private channel)
3. "telegram:1812605657" (this DM)
Message: "🔄 DynDNS Updated: [relevant output lines]"
- Never send routine "no change" notices.
Assistant
To solve the problem related to DynamoDNS, you can follow these steps:
1. **Verify the error message**: Run the cron job in your terminal and look at the output of the cf-dyndns.sh script.
2. If the output contains "STATUS:NO_CHANGE", send a blank reply to all targets:
NoReply [message]
For example, you can replace "[message]" with "No response here".
3. **Update DynamoDNS after verification**
To update DynDNS for existing records in AWS Lambda and Amazon CloudFront:
* Check the status of both DynamoDB tables: aws dynamodb describe-table --table-name Dynamic-DNS-Records --query 'Table.description' "Amazon Lamba" and "Amazon CloudFront"
Run this function to obtain new values from either table:
``python
from botocore.exceptions import NoCredentialsError
def dynamo_update_record(table_name, dynamodb_client):
try:
# You cannot directly get the DynamoDB table object using dynamodb.Table()
record_key = "Existing Key-Id"
response = dynamodb_client.update_table(
Table=Boto3.client('dynamodb', region_name='YOUR_REGION')
.get_table(Key={'Table': 'Dynamic-DNS-Records'})
.table_description(table_key=record_key)
)
# If DynamoDB doesn't find the record, it returns NoCredentialsError
if "LastEvaluedKey" in response:
# Get up-to-the-point-of-error Key for retrying from last event's "LastEvaluatedKey"
previous_last_evaluated_key = response["LastEvaluatedKey"]
new_key_to_try = previous_last_EVALUATED_key + '++'
else:
new_key_to_try = record_key
except NoCredentialsError:
print("No credentials found.")
try:
dynamodb_client.update_table(
Table=Boto3.client('dynamodb', region_name='YOUR_REGION') )
table= dynamodb_client.update_table(
Table=Boto3.client('dynamodb', region_name='YOUR_REGION')
.update_key( new_key_to_try )
).table_description(table_key={ 'Table': record_key })
* Once you've updated the DynamoDB table to have the correct dynamic DNS records, you can update your Lambda function with this code. In your lambda function file (lambda_function.ts), make use of its aws.dynamodb.Table() object instead of Boto3.client('dynamodb'). Then it's ready to handle any input.
4 **Clean up DynamoDB table operations**
To delete keys from the DynDnS records table in an AWS Lambda function using Python. You may do something like this:
`python
import os, boto3
from botocore.exceptions import NoCredentialsError
def lambda_handler(event, context):
dynamodb = boto3.resource('dynamodb', region_name='YOUR_REGION')
table_name = "Dynamic-DNS-Records"
try:
tables_response = dynamodb.Table(
TableName=table_name
).alter_table(
TableName=table_name,
Action="REMOVE"
)
print(f'DynamoDB operation: {tables_response}')
return {
'statusCode': 202
}
except NoCredentialsError:
# Not found credentials. Either change them here,
# or delete the Lambda function.
`
Finally, replace with your AWS Region where you want to update DynaDNS records
To schedule this script, use cron jobs like:
`bash
crontab -e
`
Set the run as root (as specified above) and save all changes. The command should look like this:
bash
0 * * * * /path/to/dynamo_update_record.sh
`
You can schedule it to run every minute for continuous updates or set a specific time in advance for more flexibility.
Remember, remember that automation scripts require scheduling mechanisms as well; you have two options:
1. **One-time executions:** If your script needs to be run only once, and there is no scheduled interval, use variable
* Replace the last line with this statement:
`bash
0 * * * * NO_RECURSIVE /path/to/dynamo_update_record.sh
`
2. **Scheduled intervals:** If your script needs to be run at regular intervals, you would use scheduling as follows:
* Run like so: ` bash -c "time (sleep <10) /path/to/dynamo_update_record" `
In the code, we need an action instead of , and the schedule is 0 minutes after each run in our case.
In summary:
- We've determined that DynaDNS records are being updated by changing the UPDATE_DYN DNS_Records table in AWS Lambda.
- To ensure continuous updates at a rate faster than 1 update per hour you would use **one-time execution**.
- Schedule your script using cron jobs: 0 * * * *
Here is how it should look:
**CRON Scheduling for one-time executions (update to DynamoDNS records on 00:00 every day):***
bash
*/1 * * * * /path/to/dynamo_update_record.sh
``
Use any scheduler available in your operating system:
* On Linux and macOS, **cron utility**
* On Windows **Task Scheduler**.