Configuring Operating System Manager

OSM can be configured using the following command line flags:

Flags	Type	Required	Default	Description
`kubeconfig`	string	false	`""`	Path to a kubeconfig. Only required if out-of-cluster.
`worker-cluster-kubeconfig`	string	false	`""`	Path to kubeconfig of cluster where provisioning secrets are created.
`namespace`	string	true	`""`	The namespace where the OSC controller will run.
`container-runtime`	string	false	`containerd`	Container runtime to deploy.
`external-cloud-provider`	bool	false	`false`	Cloud-provider Kubelet flag set to external..
`cluster-dns`	string	false	`10.10.10.10`	Comma-separated list of DNS server IP address.
`pause-image`	string	false	`""`	Pause image to use in Kubelet.
`initial-taints`	string	false	`""`	Taints to use when creating the node.
`node-kubelet-feature-gates`	string	false	`RotateKubeletServerCertificate=true`	Feature gates to set on the kubelet. If user overrides the value, `RotateKubeletServerCertificate=true` is appended by OSM in the feature gates.
`node-http-proxy`	string	false	`""`	If set, it configures the ‘HTTP_PROXY’ & ‘HTTPS_PROXY’ environment variable on the nodes.
`node-no-proxy`	string	false	`.svc,.cluster.local,localhost,127.0.0.1`	If set, it configures the ‘NO_PROXY’ environment variable on the nodes.
`node-insecure-registries`	string	false	`""`	Comma separated list of registries which should be configured as insecure on the container runtime.
`node-http-proxy`	string	false	`""`	If set, it configures the ‘HTTP_PROXY’ & ‘HTTPS_PROXY’ environment variable on the nodes.
`node-registry-mirrors`	string	false	`""`	Comma separated list of Docker image mirrors.
`node-containerd-registry-mirrors`	string	false	`""`	Configure registry mirrors endpoints. Can be used multiple times to specify multiple mirrors.
`node-registry-credentials-secret`	string	false	`""`	A Secret object reference, that contains auth info for image registry in namespace/secret-name form, example: kube-system/registry-credentials. See doc at https://github.com/kubermaric/machine-controller/blob/master/docs/registry-authentication.md.
`health-probe-address`	string	false	`127.0.0.1:8085`	The address on which the liveness check on /healthz and readiness check on /readyz will be available.
`metrics-address`	string	false	`127.0.0.1:8080`	The address on which Prometheus metrics will be available under /metrics.
`worker-health-probe-address`	string	false	`127.0.0.1:8086`	For worker manager, the address on which the liveness check on /healthz and readiness check on /readyz will be available.
`worker-metrics-address`	string	false	`127.0.0.1:8081`	For worker manager, the address on which Prometheus metrics will be available under /metrics.
`leader-elect`	bool	false	`true`	Enable leader election for controller manager.
`override-bootstrap-kubelet-apiserver`	string	false	`""`	Override for the API server address used in worker nodes bootstrap-kubelet.conf.
`bootstrap-token-service-account-name`	string	false	`""`	When set use the service account token from this SA as bootstrap token instead of creating a temporary one. Passed in `namespace/name` format.
`worker-count`	int	false	`10`	Number of workers which process reconciliation in parallel.
`ca-bundle`	string	false	`""`	Path to a file containing all PEM-encoded CA certificates. Will be used for Kubernetes CA certificates.

Configuring Operating System Profile

To generate bootstrapping and provisioning configurations, OSM uses the OSP(template) and values from MachineDeployment and command line flags. These values are substituted dynamically to generate the configurations.

Following is the list of the variables accessible inside an OSP:

Variable	Type	Description
`KubeVersion`	string	Kubernetes version to use, picked from the MachineDeployment.
`InTreeCCMAvailable`	bool	True if in-tree CCM is available for the cloud provider.
`ClusterDNSIPs`	[]string	List of Cluster DNS IP, picked from flags.
`KubernetesCACert`	string	CA certificate for the worker machine. Set at `/etc/kubernetes/pki/ca.crt`.
`CloudConfig`	string	Cloud config for the machine.
`ContainerRuntime`	string	Name of the container runtime to use.
`CloudProviderName`	string	Name of the cloud provider.
`ExternalCloudProvider`	bool	External CCM should be used for the cloud provider.
`PauseImage`	string	Image for the pause container, specified using `--pod-infra-container` for the kubelet.
`InitialTaints`	string	Register the node with the given list of taints.
`HTTPProxy`	string	Configuration for HTTP_PROXY, HTTPS_PROXY
`NoProxy`	string	Configuration for NO_PROXY
`ContainerRuntimeConfig`	string	Configuration for NO_PROXY
`ContainerRuntimeAuthConfig`	string	Configuration for NO_PROXY
`KubeletFeatureGates`	string	Feature gates for kubelet
`NetworkIPFamily`	string	Type of Network IP family; IPv4, IPv6 or IPv4+IPv6
`NetworkConfig`	string	Static networking configuration, picked from the MachineDeployment.
`KubeReserved`	map[string]string	Picked up from annotations on MachineDeployment.
`SystemReserved`	map[string]string	Picked up from annotations on MachineDeployment.
`EvictionHard`	map[string]string	Picked up from annotations on MachineDeployment.
`MaxPods`	int32	Picked up from annotations on MachineDeployment.
`ContainerLogMaxSize`	string	Picked up from annotations on MachineDeployment.
`ContainerLogMaxFiles`	string	Picked up from annotations on MachineDeployment.