Skip to main content

Policies

info

Network policies in the virtual cluster rely on the support for this feature in the host cluster. Make sure that your host cluster satisfies the network policy prerequisites.

Policies cover several different topics:

  • Limit ranges control the storage / CPU / memory that each pod may request.
  • Resource quotas.
  • Pod security standards
  • Network policies like network isolation.
  • Admission webhooks
    • Central Admission Control
    • The admission controller is typically running on the host cluster, where the policies enforced by the webhook cannot be changed by the virtual cluster.
    • Users could deploy their own admission webhooks to the virtual cluster, but there's little value in doing so, and this configuration is not concerned with that use case.
    • Some examples of admission controller projects:
    • It's common for organizations to develop an in-house collection of policies that can enforce naming standards etc.

You can use these settings separately for specific cases, or together, as in the case of Isolated Mode.

Config reference

policies required object pro

Policies to enforce for the virtual cluster deployment as well as within the virtual cluster.

networkPolicy required object pro

NetworkPolicy specifies network policy options.

enabled required boolean false pro

Enabled defines if the network policy should be deployed by vCluster.

fallbackDns required string pro

outgoingConnections required object pro

ipBlock required object pro

IPBlock describes a particular CIDR (Ex. "192.168.1.0/24","2001:db8::/64") that is allowed to the pods matched by a NetworkPolicySpec's podSelector. The except entry describes CIDRs that should not be included within this rule.

cidr required string pro

cidr is a string representing the IPBlock Valid examples are "192.168.1.0/24" or "2001:db8::/64"

except required string[] pro

except is a slice of CIDRs that should not be included within an IPBlock Valid examples are "192.168.1.0/24" or "2001:db8::/64" Except values will be rejected if they are outside the cidr range

annotations required object pro

Annotations are extra annotations for this resource.

labels required object pro

Labels are extra labels for this resource.

podSecurityStandard required string pro

PodSecurityStandard that can be enforced can be one of: empty (""), baseline, restricted or privileged

resourceQuota required object pro

ResourceQuota specifies resource quota options.

enabled required boolean false pro

Enabled defines if the resource quota should be enabled.

quota required object pro

Quota are the quota options

scopeSelector required object pro

ScopeSelector is the resource quota scope selector

scopes required string[] pro

Scopes are the resource quota scopes

annotations required object pro

Annotations are extra annotations for this resource.

labels required object pro

Labels are extra labels for this resource.

limitRange required object pro

LimitRange specifies limit range options.

enabled required boolean false pro

Enabled defines if the limit range should be deployed by vCluster.

default required object pro

Default are the default limits for the limit range

defaultRequest required object pro

DefaultRequest are the default request options for the limit range

annotations required object pro

Annotations are extra annotations for this resource.

labels required object pro

Labels are extra labels for this resource.

centralAdmission required object pro

CentralAdmission defines what validating or mutating webhooks should be enforced within the virtual cluster.

validatingWebhooks required object[] pro

ValidatingWebhooks are validating webhooks that should be enforced in the virtual cluster

kind required string pro

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to.

apiVersion required string pro

APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values.

metadata required object pro

Standard object metadata; More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata.

name required string pro

Name must be unique within a namespace. Is required when creating resources, although some resources may allow a client to request the generation of an appropriate name automatically. Name is primarily intended for creation idempotence and configuration definition.

labels required object pro

Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services.

annotations required object pro

Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata.

webhooks required object[] pro

Webhooks is a list of webhooks and the affected resources and operations.

name required string pro

The name of the admission webhook. Name should be fully qualified, e.g., imagepolicy.kubernetes.io, where "imagepolicy" is the name of the webhook, and kubernetes.io is the name of the organization.

clientConfig required object pro

ClientConfig defines how to communicate with the hook.

url required string pro

URL gives the location of the webhook, in standard URL form (scheme://host:port/path). Exactly one of url or service must be specified.

service required object pro

Service is a reference to the service for this webhook. Either service or url must be specified.

If the webhook is running within the cluster, then you should use service.

namespace required string pro

Namespace is the namespace of the service.

name required string pro

Name is the name of the service.

path required string pro

Path is an optional URL path which will be sent in any request to this service.

port required integer pro

If specified, the port on the service that hosting webhook. Default to 443 for backward compatibility. port should be a valid port number (1-65535, inclusive).

caBundle required string pro

CABundle is a PEM encoded CA bundle which will be used to validate the webhook's server certificate. If unspecified, system trust roots on the apiserver are used.

rules required object[] pro

Rules describes what operations on what resources/subresources the webhook cares about. The webhook cares about an operation if it matches any Rule.

failurePolicy required string pro

FailurePolicy defines how unrecognized errors from the admission endpoint are handled - allowed values are Ignore or Fail. Defaults to Fail.

matchPolicy required string pro

matchPolicy defines how the "rules" list is used to match incoming requests. Allowed values are "Exact" or "Equivalent".

namespaceSelector required object pro

NamespaceSelector decides whether to run the webhook on an object based on whether the namespace for that object matches the selector. If the object itself is a namespace, the matching is performed on object.metadata.labels. If the object is another cluster scoped resource, it never skips the webhook.

objectSelector required object pro

ObjectSelector decides whether to run the webhook based on if the object has matching labels. objectSelector is evaluated against both the oldObject and newObject that would be sent to the webhook, and is considered to match if either object matches the selector.

sideEffects required string pro

SideEffects states whether this webhook has side effects.

timeoutSeconds required integer pro

TimeoutSeconds specifies the timeout for this webhook.

admissionReviewVersions required string[] pro

AdmissionReviewVersions is an ordered list of preferred AdmissionReview versions the Webhook expects.

matchConditions required object[] pro

MatchConditions is a list of conditions that must be met for a request to be sent to this webhook. Match conditions filter requests that have already been matched by the rules, namespaceSelector, and objectSelector. An empty list of matchConditions matches all requests. There are a maximum of 64 match conditions allowed.

mutatingWebhooks required object[] pro

MutatingWebhooks are mutating webhooks that should be enforced in the virtual cluster

kind required string pro

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to.

apiVersion required string pro

APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values.

metadata required object pro

Standard object metadata; More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata.

name required string pro

Name must be unique within a namespace. Is required when creating resources, although some resources may allow a client to request the generation of an appropriate name automatically. Name is primarily intended for creation idempotence and configuration definition.

labels required object pro

Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services.

annotations required object pro

Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata.

webhooks required object[] pro

Webhooks is a list of webhooks and the affected resources and operations.

reinvocationPolicy required string pro

reinvocationPolicy indicates whether this webhook should be called multiple times as part of a single admission evaluation. Allowed values are "Never" and "IfNeeded".

name required string pro

The name of the admission webhook. Name should be fully qualified, e.g., imagepolicy.kubernetes.io, where "imagepolicy" is the name of the webhook, and kubernetes.io is the name of the organization.

clientConfig required object pro

ClientConfig defines how to communicate with the hook.

url required string pro

URL gives the location of the webhook, in standard URL form (scheme://host:port/path). Exactly one of url or service must be specified.

service required object pro

Service is a reference to the service for this webhook. Either service or url must be specified.

If the webhook is running within the cluster, then you should use service.

namespace required string pro

Namespace is the namespace of the service.

name required string pro

Name is the name of the service.

path required string pro

Path is an optional URL path which will be sent in any request to this service.

port required integer pro

If specified, the port on the service that hosting webhook. Default to 443 for backward compatibility. port should be a valid port number (1-65535, inclusive).

caBundle required string pro

CABundle is a PEM encoded CA bundle which will be used to validate the webhook's server certificate. If unspecified, system trust roots on the apiserver are used.

rules required object[] pro

Rules describes what operations on what resources/subresources the webhook cares about. The webhook cares about an operation if it matches any Rule.

failurePolicy required string pro

FailurePolicy defines how unrecognized errors from the admission endpoint are handled - allowed values are Ignore or Fail. Defaults to Fail.

matchPolicy required string pro

matchPolicy defines how the "rules" list is used to match incoming requests. Allowed values are "Exact" or "Equivalent".

namespaceSelector required object pro

NamespaceSelector decides whether to run the webhook on an object based on whether the namespace for that object matches the selector. If the object itself is a namespace, the matching is performed on object.metadata.labels. If the object is another cluster scoped resource, it never skips the webhook.

objectSelector required object pro

ObjectSelector decides whether to run the webhook based on if the object has matching labels. objectSelector is evaluated against both the oldObject and newObject that would be sent to the webhook, and is considered to match if either object matches the selector.

sideEffects required string pro

SideEffects states whether this webhook has side effects.

timeoutSeconds required integer pro

TimeoutSeconds specifies the timeout for this webhook.

admissionReviewVersions required string[] pro

AdmissionReviewVersions is an ordered list of preferred AdmissionReview versions the Webhook expects.

matchConditions required object[] pro

MatchConditions is a list of conditions that must be met for a request to be sent to this webhook. Match conditions filter requests that have already been matched by the rules, namespaceSelector, and objectSelector. An empty list of matchConditions matches all requests. There are a maximum of 64 match conditions allowed.