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This commit: - Converts various sections in the readme into individual documents. - Adds pointers to the public blogs. - Updates workflow/architecture diagram. - Adds community info and contributing guidelines.
44 lines
2.6 KiB
Markdown
44 lines
2.6 KiB
Markdown
### Node Scenarios
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Following node chaos scenarios are supported:
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1. **node_start_scenario**: scenario to stop the node instance.
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2. **node_stop_scenario**: scenario to stop the node instance.
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3. **node_stop_start_scenario**: scenario to stop and then start the node instance.
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4. **node_termination_scenario**: scenario to terminate the node instance.
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5. **node_reboot_scenario**: scenario to reboot the node instance.
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6. **stop_kubelet_scenario**: scenario to stop the kubelet of the node instance.
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7. **stop_start_kubelet_scenario**: scenario to stop and start the kubelet of the node instance.
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8. **node_crash_scenario**: scenario to crash the node instance.
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**NOTE**: If the node doesn't recover from the node_crash_scenario injection, reboot the node to get it back to Ready state.
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**NOTE**: node_start_scenario, node_stop_scenario, node_stop_start_scenario, node_termination_scenario, node_reboot_scenario and stop_start_kubelet_scenario are supported only on AWS as of now.
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**NOTE**: AWS is the only cloud platform supported as of today but we are looking into adding more. Make sure [AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html) is installed.
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**NOTE**: The `stop_start_kubelet_scenario` and `node_crash_scenario` scenarios are supported as they are independent of the cloud platform.
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Node scenarios can be injected by placing the node scenarios config files under node_scenarios option in the kraken config. Refer to [node_scenarios_example](https://github.com/openshift-scale/kraken/blob/master/scenarios/node_scenarios_example.yml) config file.
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```
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node_scenarios:
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- actions: # node chaos scenarios to be injected
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- node_stop_start_scenario
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- stop_start_kubelet_scenario
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- node_crash_scenario
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node_name: # node on which scenario has to be injected
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label_selector: node-role.kubernetes.io/worker # when node_name is not specified, a node with matching label_selector is selected for node chaos scenario injection
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instance_kill_count: 1 # number of times to inject each scenario under actions
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timeout: 120 # duration to wait for completion of node scenario injection
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cloud_type: aws # cloud type on which Kubernetes/OpenShift runs
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- actions:
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- node_reboot_scenario
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node_name:
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label_selector: node-role.kubernetes.io/infra
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instance_kill_count: 1
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timeout: 120
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cloud_type: aws
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```
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