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env-variables.md

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Different Environment Variables used

This page describes about the different environment variables that are used to configure kube-scheduler-simulator.

Please refer docker-compose.yml as an example use.

PORT: (required) This is the port number on which kube-scheduler-simulator server is started.

KUBE_SCHEDULER_SIMULATOR_ETCD_URL: (required) This is the URL for etcd. The simulator runs kube-apiserver internally, and the kube-apiserver uses this etcd.

CORS_ALLOWED_ORIGIN_LIST: This URL represents the URL once web UI is started. The simulator and internal kube-apiserver set the allowed origin for CORS_ALLOWED_ORIGIN_LIST.

KUBECONFIG: This is for the beta feature "Existing cluster Importing". This variable is used to find Kubeconfig required to access your cluster for importing resources to scheduler simulator.

KUBE_API_HOST: This is the host of kube-apiserver which the simulator starts internally. Its default value is 127.0.0.1.

KUBE_API_PORT: This is the port of kube-apiserver. Its default value is 3131.

KUBE_SCHEDULER_CONFIG_PATH: The path to a KubeSchedulerConfiguration file. If passed, the simulator will start the scheduler with that configuration. Or, if you use web UI, you can change the configuration from the web UI as well.

EXTERNAL_IMPORT_ENABLED: This variable indicates whether the simulator will import resources from an existing cluster or not. Note, this is still a beta feature.

For Web UI

KUBE_API_SERVER_URL: This is the kube-apiserver URL. Its default value is http://localhost:3131.

BASE_URL: This is the URL for the kube-scheduler-simulator server. Its default value is http://localhost:1212.

ALPHA_TABLE_VIEWS: This variable enables the alpha feature table view. Its value is either 0(default) or 1 (0 meaning disalbed, 1 meaning enabled). We can see the resource status in the table.