Openstack / Start Servers
Start Servers
Start specified servers in OpenStack.
openstack server start <instance_id1 instance_id2 ...> openstack server start <instance_id1 instance_id2 ...> #!/bin/bash
# Start Servers
openstack server start {{instance_id1 instance_id2 ...}} import subprocess
# Start Servers
# Make sure to replace <placeholders> with actual values
def run_command():
cmd = [
"openstack",
"server",
"start",
"{{instance_id1",
"instance_id2",
"...}}"
]
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 instances require reactivation post-shutdown or recovery efforts.
Pro Tip
Use `--wait` to ensure command execution completion before further actions.
Anatomy of Output
Understanding the result
Starting servers: 2 Action Summary Indicates the number of servers targeted for starting.
+--------------------------------------+---------+----------+ Output Header Displays server IDs and their respective statuses.
| ID | Name | Status | Column Headers Shows the ID and state of each server.
| 567890ab-abcd-ef00-5555-66778899aabb | test-server | ACTIVE | Server Entry Output indicating the server has been started successfully.
Power User Variants
Optimized versions
openstack server start --all Start all servers in the current project.
Troubleshooting
Common pitfalls
Server not found (HTTP 404)
Solution: Check the server ID or names for accuracy.
Conflict (HTTP 409)
Solution: Ensure the servers are in a stopped state before starting.
Unauthorized (HTTP 401)
Solution: Verify your identity has sufficient permissions to start servers.
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.
-
<instance_id1 instance_id2 ...> - instance id1 instance id2 ...
- The value supplied for instance id1 instance id2 ....
Alternative Approaches
Comparable commands in other tools
Alternative networking tools for the same job.
dnsmasq --version Curl / Send Form Encoded Data curl -X POST -d '<name=bob>' {http://example.com/form} Openvpn / Connect To Host With Same Static Key sudo openvpn --remote <bob.example.com> --dev <tun1> --ifconfig <10.4.0.2> <10.4.0.1> --secret <path/to/key> Ifconfig / Convert Command Output To Json Via Pipe <ifconfig> | jc <--ifconfig> Jc / Convert Command Output To Json Via Magic Syntax jc <ifconfig>