Openstack / Update Subnet With Dns
Update Subnet With Dns
Updates specific attributes for an existing OpenStack subnet.
openstack subnet set --dns-nameserver 8.8.8.8 --name <new_subnet_name> <subnet_id> openstack subnet set --dns-nameserver 8.8.8.8 --name <new_subnet_name> <subnet_id> #!/bin/bash
# Update Subnet With Dns
openstack subnet set --dns-nameserver 8.8.8.8 --name {{new_subnet_name}} {{subnet_id}} import subprocess
# Update Subnet With Dns
# Make sure to replace <placeholders> with actual values
def run_command():
cmd = [
"openstack",
"subnet",
"set",
"--dns-nameserver",
"8.8.8.8",
"--name",
"<new_subnet_name>",
"<subnet_id>"
]
try:
print(f"Executing: {' '.join(cmd)}")
subprocess.run(cmd, check=True)
except subprocess.CalledProcessError as e:
print(f"Error: {e}")
except FileNotFoundError:
print("Error: openstack not found. Please install it first.")
if __name__ == "__main__":
run_command() When To Use
When changing DNS settings for existing subnets in response to network policy changes.
Pro Tip
Setting `--dns-nameserver` updates the DNS resolver; ensure it complies with internal DNS policies.
Command Builder
Tune the command before you copy it
openstack subnet set --dns-nameserver 8.8.8.8 --name <new_subnet_name> <subnet_id> Anatomy of Output
Understanding the result
+--------------+-------------------+ Header: Subnet Update Confirmation Indicates the output of the update operation.
| id | subnet-123456 | Updated Subnet ID Confirms which subnet was modified.
| name | new_subnet_name | New Subnet Name Indicates the updated name for the subnet.
| dns_nameservers | 8.8.8.8 | Updated DNS Server Shows the DNS server that has been updated.
Troubleshooting
Common pitfalls
ERROR: Subnet 'subnet-xyz' not found.
Solution: Verify the subnet ID is correct before attempting an update.
ERROR: InvalidInput: DNS nameserver must be an IP address.
Solution: Ensure the value provided for DNS nameserver is a valid IPv4 or IPv6 address.
ERROR: Forbidden: You do not have permission to perform this action.
Solution: Verify access rights for updating the subnet in your OpenStack project.
Command Breakdown
What each part is doing
-
openstack - Base Command
- The executable that performs this operation. Here it runs Openstack before the shell applies any redirect operators.
-
<new_subnet_name> - new subnet name
- The value supplied for new subnet name.
-
<subnet_id> - subnet id
- The value supplied for subnet id.
-
--dns-nameserver - Command Option
- Tool-specific option used by this command invocation.
-
--name - Command Option
- Tool-specific option used by this command invocation.
Alternative Approaches
Comparable commands in other tools
Alternative cloud infrastructure tools for the same job.
gcloud compute ssh <user>@<instance> Flyctl / View Status Of Specific Application flyctl status --app <app_name> Aws / Delete Eks Cluster 1608 aws eks delete-cluster --name <cluster_name> Gh / Create Codespace Github Interactively gh cs create Cradle / Submit Elasticsearch Schema cradle elastic map