- What's New
- Function Overview
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- User Guide
- Best Practices
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Developer Guide
- Overview
- Using Native kubectl (Recommended)
- Namespace and Network
- Pod
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- Managing Network Access Through Service and Ingress
- Using PersistentVolumeClaim to Apply for Persistent Storage
- ConfigMap and Secret
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- YAML Syntax
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API Reference
- Before You Start
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Kubernetes APIs
- ConfigMap
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Deployment
- Querying All Deployments
- Deleting All Deployments in a Namespace
- Querying Deployments in a Namespace
- Creating a Deployment
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- Querying a Deployment
- Updating a Deployment
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- Querying the Scaling Operation of a Specified Deployment
- Updating the Scaling Operation of a Specified Deployment
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- Querying the Status of a Deployment
- Ingress
- OpenAPIv2
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- ResourceQuota
- CronJob
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API groups
- Querying API Versions
- Querying All APIs of v1
- Querying an APIGroupList
- Querying APIGroup (/apis/apps)
- Querying APIs of apps/v1
- Querying an APIGroup (/apis/batch)
- Querying an APIGroup (/apis/batch.volcano.sh)
- Querying All APIs of batch.volcano.sh/v1alpha1
- Querying All APIs of batch/v1
- Querying All APIs of batch/v1beta1
- Querying an APIGroup (/apis/crd.yangtse.cni)
- Querying All APIs of crd.yangtse.cni/v1
- Querying an APIGroup (/apis/extensions)
- Querying All APIs of extensions/v1beta1
- Querying an APIGroup (/apis/metrics.k8s.io)
- Querying All APIs of metrics.k8s.io/v1beta1
- Querying an APIGroup (/apis/networking.cci.io)
- Querying All APIs of networking.cci.io/v1beta1
- Querying an APIGroup (/apis/rbac.authorization.k8s.io)
- Querying All APIs of rbac.authorization.k8s.io/v1
- Event
- PersistentVolumeClaim
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- Data Structure
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- Appendix
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FAQs
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Basic Concept FAQs
- What Is CCI?
- What Are the Differences Between Cloud Container Instance and Cloud Container Engine?
- What Is an Environment Variable?
- What Is a Service?
- What Is Mcore?
- What Are the Relationships Between Images, Containers, and Workloads?
- What Are Kata Containers?
- Can kubectl Be Used to Manage Container Instances?
- What Are Core-Hours in CCI Resource Packages?
- Workload Abnormalities
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Container Workload FAQs
- Why Service Performance Does Not Meet the Expectation?
- How Do I Set the Quantity of Instances (Pods)?
- How Do I Check My Resource Quotas?
- How Do I Set Probes for a Workload?
- How Do I Configure an Auto Scaling Policy?
- What Do I Do If the Workload Created from the sample Image Fails to Run?
- How Do I View Pods After I Call the API to Delete a Deployment?
- Why an Error Is Reported When a GPU-Related Operation Is Performed on the Container Entered by Using exec?
- Can I Start a Container in Privileged Mode When Running the systemctl Command in a Container in a CCI Cluster?
- Why Does the Intel oneAPI Toolkit Fail to Run VASP Tasks Occasionally?
- Why Are Pods Evicted?
- Why Is the Workload Web-Terminal Not Displayed on the Console?
- Why Are Fees Continuously Deducted After I Delete a Workload?
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Image Repository FAQs
- Can I Export Public Images?
- How Do I Create a Container Image?
- How Do I Upload Images?
- Does CCI Provide Base Container Images for Download?
- Does CCI Administrator Have the Permission to Upload Image Packages?
- What Permissions Are Required for Uploading Image Packages for CCI?
- What Do I Do If Authentication Is Required During Image Push?
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Network Management FAQs
- How Do I View the VPC CIDR Block?
- Does CCI Support Load Balancing?
- How Do I Configure the DNS Service on CCI?
- Does CCI Support InfiniBand (IB) Networks?
- How Do I Access a Container from a Public Network?
- How Do I Access a Public Network from a Container?
- What Do I Do If Access to a Workload from a Public Network Fails?
- What Do I Do If Error 504 Is Reported When I Access a Workload?
- What Do I Do If the Connection Timed Out?
- Storage Management FAQs
- Log Collection
- Account
- SDK Reference
- Videos
- General Reference
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Label
Why Are Labels Required?
As resources increase, how to classify and manage resources becomes important. Kubernetes provides a mechanism to classify resources, that is, using labels. Labels are simple but powerful. Almost all resources in the Kubernetes can be organized by labels.
A label is a key-value pair, which can be set when a resource is created, or can be added or modified later.
Taking pods as an example, as the number of pods increases, pods become cluttered and difficult to manage, as shown in the following figure.
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If we attach different labels to the pods, the situation is totally different, as shown in the following figure.

Adding a Label
A label is a key-value pair. As shown below, two labels app=nginx and env=prod are set for a pod.
apiVersion: v1 kind: Pod metadata: name: nginx labels: # Add the following two labels to the pod. app: nginx env: prod spec: containers: - image: nginx:latest name: container-0 resources: limits: cpu: 500m memory: 1024Mi requests: cpu: 500m memory: 1024Mi imagePullSecrets: - name: imagepull-secret
When a pod has labels, you can view the label of the pod by using --show-labels when querying the pod.
$ kubectl get pod --show-labels -n $namespace_name NAME READY STATUS RESTARTS AGE LABELS nginx 1/1 Running 0 50s app=nginx,env=prod
You can also use -L to query only certain labels.
$ kubectl get pod -L app,env -n $namespace_name NAME READY STATUS RESTARTS AGE APP ENV nginx 1/1 Running 0 1m nginx prod
For an existing pod, you can directly run the kubectl label command to add a label.
$ kubectl label po nginx creation_method=manual -n $namespace_name pod "nginx" labeled $ kubectl get pod --show-labels -n $namespace_name NAME READY STATUS RESTARTS AGE LABELS nginx 1/1 Running 0 50s app=nginx,env=prod,creation_method=manual
Modifying a Label
If you want to modify an existing label, you need to add --overwrite to the command, as shown below:
$ kubectl label po nginx env=debug --overwrite -n $namespace_name pod "nginx" labeled $ kubectl get pod --show-labels -n $namespace_name NAME READY STATUS RESTARTS AGE LABELS nginx 1/1 Running 0 50s app=nginx,env=debug,creation_method=manual
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