容器标签使用小记

容器云技术

docker cli使用举例

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docker ps -a --filter "label=org.hyperledger.fabric.chaincode.id.name=test-chaincode" --filter "label=org.hyperledger.fabric.chaincode.id.version=v0.0.1"

或者

docker ps -a -f "label=org.hyperledger.fabric.chaincode.id.name=test-chaincode" -f "label=org.hyperledger.fabric.chaincode.id.version=v0.0.1"

如下图所示：

docker_label

docker client go编码示例

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...
import (
	"github.com/docker/docker/api/types"

	"github.com/docker/docker/api/types/filters"
)
...
...
		flagArgs := []string{
			fmt.Sprintf("label=%s=%s", ChainCodeNameLabelKey, contractName), // "label=org.hyperledger.fabric.chaincode.id.name=wx-hy001"
			fmt.Sprintf("label=%s=%s", ChainCodeVersionLabelKey, contractVersion), // "label=org.hyperledger.fabric.chaincode.id.version=1.2.0"
		}
		args := filters.NewArgs()
		for i := range flagArgs {
			args, err = filters.ParseFlag(flagArgs[i], args)
			if err != nil {
				glog.Error(err)
				return contractChainCodes, err
			}
		}
		containerList, err := cli.ContainerList(types.ContainerListOptions{
			Filters: args,
		})
		if err != nil {
			glog.Error(err)
			return contractChainCodes, err
		}
		for j := 0; j < len(containerList); j++ {
			container := containerList[j]
			containerId := container.ID
			containerName := container.Names[0][1 : ]
			contractChainCode := module.ContractChainCode{
				ContainerId: containerId,
				ContainerName: containerName,
				ContainerHost: hostIP,
			}
			contractChainCodes = append(contractChainCodes, contractChainCode)
		}
...

如下图所示：

docker_label

kubernetes cli使用举例

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kubectl get pod --all-namespaces -o wide -l baas.yonghui.cn/network-name=test-network

或者

kubectl get pod --all-namespaces -o wide -l baas.yonghui.cn/network-name=test-network,baas.yonghui.cn/network-component=peer

如下图所示：

kubernetes_label

kubernetes client go编码示例

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...
import (
	module "yonghui.cn/blockchain/yhbkas/module/network"
	pkglabels "k8s.io/apimachinery/pkg/labels"
)
...
...
	networkNameKey := string(sc.NetworkNameKey)
	labels := map[string]string{
		networkNameKey: networkName,
	}
	selector := pkglabels.FormatLabels(labels)
	opts := metav1.ListOptions{
		LabelSelector: selector,
	}

	podList, err := clientSet.CoreV1().Pods(metav1.NamespaceAll).List(opts)
	if err != nil {
		return module.GetNetworkComponentsResponse{
			CommonResponse: module.CommonResponse{
				Status:  http.StatusInternalServerError,
				Message: "GetNetworkComponents unsuccessfully.",
			},
			NetworkComponents: networkComponents,
		}
	}

	for i := 0; i < len(podList.Items); i++  {
		pod := podList.Items[i]
		podContainers := make([]module.PodContainer, 0)
		containers := pod.Spec.Containers
		for j := 0; j < len(containers); j++ {
			container := containers[j]
			podContainer := module.PodContainer{
				Name: container.Name,
			}
			podContainers = append(podContainers, podContainer)
		}
		labels := pod.Labels
		componentTypeKey := string(sc.NetworkComponentTypeKey)
		componentTypeValue := labels[componentTypeKey]
		networkComponent := module.NetworkComponent{
			Id: string(pod.UID),
			Name: pod.Name,
			Namespace: pod.Namespace,
			Containers: podContainers,
			Role: componentTypeValue,
		}
		networkComponents = append(networkComponents, networkComponent)
	}
...

如下图所示：

kubernetes_label