Help Center/ Cloud Container Instance/ API Reference/ Proprietary APIs/ Metrics/ Obtaining Metrics of All Pods in a Namespace
Updated on 2023-12-21 GMT+08:00

Obtaining Metrics of All Pods in a Namespace

Function

This API is used to obtain metrics of all pods in a specified namespace.

URI

GET /apis/metrics.k8s.io/v1beta1/namespaces/{namespace}/pods

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

namespace

Yes

String

object name and auth scope, such as for teams and projects

Table 2 Query Parameters

Parameter

Mandatory

Type

Description

allowWatchBookmarks

No

Boolean

allowWatchBookmarks requests watch events with type "BOOKMARK". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.

continue

No

String

The continue option should be set when retrieving more results from the server. Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. If the specified continue value is no longer valid whether due to expiration (generally five to fifteen minutes) or a configuration change on the server, the server will respond with a 410 ResourceExpired error together with a continue token. If the client needs a consistent list, it must restart their list without the continue field. Otherwise, the client may send another list request with the token received with the 410 error, the server will respond with a list starting from the next key, but from the latest snapshot, which is inconsistent from the previous list results - objects that are created, modified, or deleted after the first list request will be included in the response, as long as their keys are after the "next key".

This field is not supported when watch is true. Clients may start a watch from the last resourceVersion value returned by the server and not miss any modifications.

fieldSelector

No

String

A selector to restrict the list of returned objects by their fields. Defaults to everything.

labelSelector

No

String

A selector to restrict the list of returned objects by their labels. Defaults to everything.

limit

No

Integer

limit is a maximum number of responses to return for a list call. If more items exist, the server will set the continue field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true.

The server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.

pretty

No

String

If 'true', then the output is pretty printed.

resourceVersion

No

String

resourceVersion sets a constraint on what resource versions a request may be served from. See https://kubernetes.io/docs/reference/using-api/api-concepts/#resource-versions for details.

Defaults to unset

resourceVersionMatch

No

String

resourceVersionMatch determines how resourceVersion is applied to list calls. It is highly recommended that resourceVersionMatch be set for list calls where resourceVersion is set See https://kubernetes.io/docs/reference/using-api/api-concepts/#resource-versions for details.

Defaults to unset

timeoutSeconds

No

Integer

Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.

watch

No

Boolean

Watch for changes to the described resources and return them as a stream of add, update, and remove notifications. Specify resourceVersion.

Request Parameters

Table 3 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token.

It can be obtained through the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

apiVersion

String

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. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources

items

Array of io.k8s.metrics.pkg.apis.metrics.v1beta1.PodMetrics objects

List of pod metrics.

kind

String

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

metadata

io.k8s.apimachinery.pkg.apis.meta.v1.ListMeta_v2 object

Standard list metadata. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

Table 5 io.k8s.metrics.pkg.apis.metrics.v1beta1.PodMetrics

Parameter

Type

Description

apiVersion

String

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. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources

containers

Array of io.k8s.metrics.pkg.apis.metrics.v1beta1.ContainerMetrics objects

Metrics for all containers are collected within the same time window.

kind

String

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

metadata

io.k8s.apimachinery.pkg.apis.meta.v1.ObjectMeta_v2 object

ObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.

timestamp

String

The following fields define time interval from which metrics were collected from the interval [Timestamp-Window, Timestamp].

window

String

Duration is a wrapper around time.Duration which supports correct marshaling to YAML and JSON. In particular, it marshals into strings, which can be used as map keys in json.

Table 6 io.k8s.metrics.pkg.apis.metrics.v1beta1.ContainerMetrics

Parameter

Type

Description

name

String

Container name corresponding to the one from pod.spec.containers.

usage

Map<String,String>

The memory usage is the memory working set.

Table 7 io.k8s.apimachinery.pkg.apis.meta.v1.ObjectMeta_v2

Parameter

Type

Description

annotations

Map<String,String>

Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: http://kubernetes.io/docs/user-guide/annotations

clusterName

String

The name of the cluster which the object belongs to. This is used to distinguish resources with same name and namespace in different clusters. This field is not set anywhere right now and apiserver is going to ignore it if set in create or update request.

creationTimestamp

String

CreationTimestamp is a timestamp representing the server time when this object was created. It is not guaranteed to be set in happens-before order across separate operations. Clients may not set this value. It is represented in RFC3339 form and is in UTC.

Populated by the system. Read-only. Null for lists. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata

deletionGracePeriodSeconds

Long

Number of seconds allowed for this object to gracefully terminate before it will be removed from the system. Only set when deletionTimestamp is also set. May only be shortened. Read-only.

deletionTimestamp

String

DeletionTimestamp is RFC 3339 date and time at which this resource will be deleted. This field is set by the server when a graceful deletion is requested by the user, and is not directly settable by a client. The resource is expected to be deleted (no longer visible from resource lists, and not reachable by name) after the time in this field, once the finalizers list is empty. As long as the finalizers list contains items, deletion is blocked. Once the deletionTimestamp is set, this value may not be unset or be set further into the future, although it may be shortened or the resource may be deleted prior to this time. For example, a user may request that a pod is deleted in 30 seconds. The Kubelet will react by sending a graceful termination signal to the containers in the pod. After that 30 seconds, the Kubelet will send a hard termination signal (SIGKILL) to the container and after cleanup, remove the pod from the API. In the presence of network partitions, this object may still exist after this timestamp, until an administrator or automated process can determine the resource is fully terminated. If not set, graceful deletion of the object has not been requested.

Populated by the system when a graceful deletion is requested. Read-only. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata

finalizers

Array of strings

Must be empty before the object is deleted from the registry. Each entry is an identifier for the responsible component that will remove the entry from the list. If the deletionTimestamp of the object is non-nil, entries in this list can only be removed.

generateName

String

GenerateName is an optional prefix, used by the server, to generate a unique name ONLY IF the Name field has not been provided. If this field is used, the name returned to the client will be different than the name passed. This value will also be combined with a unique suffix. The provided value has the same validation rules as the Name field, and may be truncated by the length of the suffix required to make the value unique on the server.

If this field is specified and the generated name exists, the server will NOT return a 409 - instead, it will either return 201 Created or 500 with Reason ServerTimeout indicating a unique name could not be found in the time allotted, and the client should retry (optionally after the time indicated in the Retry-After header).

Applied only if Name is not specified. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#idempotency

generation

Long

A sequence number representing a specific generation of the desired state. Populated by the system. Read-only.

initializers

io.k8s.apimachinery.pkg.apis.meta.v1.Initializers object

An initializer is a controller which enforces some system invariant at object creation time. This field is a list of initializers that have not yet acted on this object. If nil or empty, this object has been completely initialized. Otherwise, the object is considered uninitialized and is hidden (in list/watch and get calls) from clients that haven't explicitly asked to observe uninitialized objects.

When an object is created, the system will populate this list with the current set of initializers. Only privileged users may set or modify this list. Once it is empty, it may not be modified further by any user.

DEPRECATED - initializers are an alpha field and will be removed in v1.15.

labels

Map<String,String>

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. More info: http://kubernetes.io/docs/user-guide/labels

managedFields

Array of io.k8s.apimachinery.pkg.apis.meta.v1.ManagedFieldsEntry_v2 objects

ManagedFields maps workflow-id and version to the set of fields that are managed by that workflow. This is mostly for internal housekeeping, and users typically shouldn't need to set or understand this field. A workflow can be the user's name, a controller's name, or the name of a specific apply path like "ci-cd". The set of fields is always in the version that the workflow used when modifying the object.

This field is alpha and can be changed or removed without notice.

name

String

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. Cannot be updated. More info: http://kubernetes.io/docs/user-guide/identifiers#names

namespace

String

Namespace defines the space within each name must be unique. An empty namespace is equivalent to the "default" namespace, but "default" is the canonical representation. Not all objects are required to be scoped to a namespace - the value of this field for those objects will be empty.

Must be a DNS_LABEL. Cannot be updated. More info: http://kubernetes.io/docs/user-guide/namespaces

ownerReferences

Array of io.k8s.apimachinery.pkg.apis.meta.v1.OwnerReference_v2 objects

List of objects depended by this object. If ALL objects in the list have been deleted, this object will be garbage collected. If this object is managed by a controller, then an entry in this list will point to this controller, with the controller field set to true. There cannot be more than one managing controller.

resourceVersion

String

An opaque value that represents the internal version of this object that can be used by clients to determine when objects have changed. May be used for optimistic concurrency, change detection, and the watch operation on a resource or set of resources. Clients must treat these values as opaque and passed unmodified back to the server. They may only be valid for a particular resource or set of resources.

Populated by the system. Read-only. Value must be treated as opaque by clients and . More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#concurrency-control-and-consistency

selfLink

String

SelfLink is a URL representing this object. Populated by the system. Read-only.

uid

String

UID is the unique in time and space value for this object. It is typically generated by the server on successful creation of a resource and is not allowed to change on PUT operations.

Populated by the system. Read-only. More info: http://kubernetes.io/docs/user-guide/identifiers#uids

Table 8 io.k8s.apimachinery.pkg.apis.meta.v1.Initializers

Parameter

Type

Description

pending

Array of io.k8s.apimachinery.pkg.apis.meta.v1.Initializer objects

Pending is a list of initializers that must execute in order before this object is visible. When the last pending initializer is removed, and no failing result is set, the initializers struct will be set to nil and the object is considered as initialized and visible to all clients.

result

io.k8s.apimachinery.pkg.apis.meta.v1.Status_v2 object

If result is set with the Failure field, the object will be persisted to storage and then deleted, ensuring that other clients can observe the deletion.

Table 9 io.k8s.apimachinery.pkg.apis.meta.v1.Initializer

Parameter

Type

Description

name

String

name of the process that is responsible for initializing this object.

Table 10 io.k8s.apimachinery.pkg.apis.meta.v1.Status_v2

Parameter

Type

Description

apiVersion

String

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. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#resources

code

Integer

Suggested HTTP return code for this status, 0 if not set.

details

io.k8s.apimachinery.pkg.apis.meta.v1.StatusDetails_v2 object

Extended data associated with the reason. Each reason may define its own extended details. This field is optional and the data returned is not guaranteed to conform to any schema except that defined by the reason type.

kind

String

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

message

String

A human-readable description of the status of this operation.

metadata

io.k8s.apimachinery.pkg.apis.meta.v1.ListMeta_v2 object

Standard list metadata. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

reason

String

A machine-readable description of why this operation is in the "Failure" status. If this value is empty there is no information available. A Reason clarifies an HTTP status code but does not override it.

status

String

Status of the operation. One of: "Success" or "Failure". More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status

Table 11 io.k8s.apimachinery.pkg.apis.meta.v1.StatusDetails_v2

Parameter

Type

Description

causes

Array of io.k8s.apimachinery.pkg.apis.meta.v1.StatusCause objects

The Causes array includes more details associated with the StatusReason failure. Not all StatusReasons may provide detailed causes.

group

String

The group attribute of the resource associated with the status StatusReason.

kind

String

The kind attribute of the resource associated with the status StatusReason. On some operations may differ from the requested resource Kind. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

name

String

The name attribute of the resource associated with the status StatusReason (when there is a single name which can be described).

retryAfterSeconds

Integer

If specified, the time in seconds before the operation should be retried. Some errors may indicate the client must take an alternate action

  • for those errors this field may indicate how long to wait before taking the alternate action.

uid

String

UID of the resource. (when there is a single resource which can be described). More info: http://kubernetes.io/docs/user-guide/identifiers#uids

Table 12 io.k8s.apimachinery.pkg.apis.meta.v1.StatusCause

Parameter

Type

Description

field

String

The field of the resource that has caused this error, as named by its JSON serialization. May include dot and postfix notation for nested attributes. Arrays are zero-indexed. Fields may appear more than once in an array of causes due to fields having multiple errors. Optional.

Examples: "name" - the field "name" on the current resource "items[0].name" - the field "name" on the first array entry in "items"

message

String

A human-readable description of the cause of the error. This field may be presented as-is to a reader.

reason

String

A machine-readable description of the cause of the error. If this value is empty there is no information available.

Table 13 io.k8s.apimachinery.pkg.apis.meta.v1.ManagedFieldsEntry_v2

Parameter

Type

Description

apiVersion

String

APIVersion defines the version of this resource that this field set applies to. The format is "group/version" just like the top-level APIVersion field. It is necessary to track the version of a field set because it cannot be automatically converted.

fields

Object

Fields identifies a set of fields.

manager

String

Manager is an identifier of the workflow managing these fields.

operation

String

Operation is the type of operation which lead to this ManagedFieldsEntry being created. The only valid values for this field are 'Apply' and 'Update'.

time

String

Time is timestamp of when these fields were set. It should always be empty if Operation is 'Apply'

Table 14 io.k8s.apimachinery.pkg.apis.meta.v1.OwnerReference_v2

Parameter

Type

Description

apiVersion

String

API version of the referent.

blockOwnerDeletion

Boolean

If true, AND if the owner has the "foregroundDeletion" finalizer, then the owner cannot be deleted from the key-value store until this reference is removed. Defaults to false. To set this field, a user needs "delete" permission of the owner, otherwise 422 (Unprocessable Entity) will be returned.

controller

Boolean

If true, this reference points to the managing controller.

kind

String

Kind of the referent. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds

name

String

Name of the referent. More info: http://kubernetes.io/docs/user-guide/identifiers#names

uid

String

UID of the referent. More info: http://kubernetes.io/docs/user-guide/identifiers#uids

Table 15 io.k8s.apimachinery.pkg.apis.meta.v1.ListMeta_v2

Parameter

Type

Description

continue

String

continue may be set if the user set a limit on the number of items returned, and indicates that the server has more data available. The value is opaque and may be used to issue another request to the endpoint that served this list to retrieve the next set of available objects. Continuing a consistent list may not be possible if the server configuration has changed or more than a few minutes have passed. The resourceVersion field returned when using this continue value will be identical to the value in the first response, unless you have received this token from an error message.

resourceVersion

String

String that identifies the server's internal version of this object that can be used by clients to determine when objects have changed. Value must be treated as opaque by clients and passed unmodified back to the server. Populated by the system. Read-only. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#concurrency-control-and-consistency

selfLink

String

selfLink is a URL representing this object. Populated by the system. Read-only.

Example Requests

None

Example Responses

Status code: 200

OK

{
  "apiVersion" : "metrics.k8s.io/v1beta1",
  "items" : [ {
    "containers" : [ {
      "name" : "container-0",
      "usage" : {
        "cpu" : "374598n",
        "cpu_accumulated" : "127739654828n",
        "memory" : "1540Ki",
        "memory_rss" : "284Ki",
        "memory_usage" : "1804Ki"
      }
    } ],
    "metadata" : {
      "creationTimestamp" : "2023-03-28T11:24:34Z",
      "name" : "cci-deployment-20233231-6c8d7f74f7-2t6k5",
      "namespace" : "cci-namespace-13238101",
      "selfLink" : "/apis/metrics.k8s.io/v1beta1/namespaces/cci-namespace-13238101/pods/cci-deployment-20233231-6c8d7f74f7-2t6k5"
    },
    "timestamp" : "2023-03-28T11:24:19Z",
    "window" : "30s"
  }, {
    "containers" : [ {
      "name" : "container-0",
      "usage" : {
        "cpu" : "0",
        "cpu_accumulated" : "75422933n",
        "memory" : "6236Ki",
        "memory_rss" : "1644Ki",
        "memory_usage" : "12308Ki"
      }
    } ],
    "metadata" : {
      "creationTimestamp" : "2023-03-28T11:24:34Z",
      "name" : "cci-deployment-687-1678883958925-599b74469b-7bmqh",
      "namespace" : "cci-namespace-13238101",
      "selfLink" : "/apis/metrics.k8s.io/v1beta1/namespaces/cci-namespace-13238101/pods/cci-deployment-687-1678883958925-599b74469b-7bmqh"
    },
    "timestamp" : "2023-03-28T11:24:15Z",
    "window" : "30s"
  } ],
  "kind" : "PodMetricsList",
  "metadata" : {
    "selfLink" : "/apis/metrics.k8s.io/v1beta1/namespaces/cci-namespace-13238101/pods"
  }
}

Status Codes

Status Code

Description

200

OK

400

BadRequest

401

Unauthorized

403

Forbidden

404

NotFound

405

MethodNotAllowed

406

NotAcceptable

409

Conflict

415

UnsupportedMediaType

422

Invalid

429

TooManyRequests

500

InternalError

503

ServiceUnavailable

504

ServerTimeout