Terminate Instance Operation Details-5 minutes a day to play OpenStack (33)

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This section analyzes Nova Terminate operations in detail through logs.

Terminate operation is to delete instance, the following is the flowchart of Terminate instance

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1. Send a request to NOVA-API

2. Nova-api sending messages

3. Nova-compute Performing actions

Let's discuss each step in detail below.

send a request to Nova-api

The customer (which can be an OpenStack end user or another program) sends a request to the API (NOVA-API): "Remove this Instance for me"

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View Log/opt/stack/logs/n-api.log

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Nova-api sending Messages

Nova-api sent a message to Messaging (RabbitMQ): "Delete this Instance" source code in/opt/stack/nova/nova/compute/api.py, by _do_force_delete.

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Nova-compute Performing Actions

View Log/opt/stack/logs/n-cpu.log

Close instance

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Delete a instance image file

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Freeing other resources such as virtual networks

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The above is a detailed analysis of terminate, the next section we continue to analyze pause/resume operations.

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Terminate Instance Operation Details-5 minutes a day to play OpenStack (33)