fabric8 API操作ConfigMap

ConfigMap用来保存key-value pair配置数据，数据可以在pod容器中挂载. 可以简单理解为Linux系统中的/etc目录，用来存储配置文件的目录。这里以将ConfigMap数据作为容器内配置文件举例. 本例中, ConfigMap挂载到容器后, 其每一个item会成为挂载目录下的一个文件, key为文件名, 文件内容是key对应的值.

前台UI如下:

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添加ConfigMap内容:

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点击保存, 将键值对数据以map方式传入后台, 构建ConfigMap对象并进行创建:

构建对象:

	/**
	 * 构建ConfigMap对象
	 * @param ku8ConfigMap
	 */
	public void createConfigMap(Ku8ConfigMap ku8ConfigMap) {
		k8sAPIService.createConfigMap(
				ku8ConfigMap.getNamespace(), 
				new ConfigMapBuilder()
					.withKind("ConfigMap")
					.withApiVersion("v1")
					.withNewMetadata()
						.withName(ku8ConfigMap.getName())
						.withNamespace(ku8ConfigMap.getNamespace())
					.endMetadata()
					.withData(ku8ConfigMap.getData())
					.build()
		);
	}

创建对象:

	/**
	 * 创建ConfigMap
	 * @param namespace
	 * @param configMap
	 * @return
	 */
	public ConfigMap createConfigMap(String namespace, ConfigMap configMap) {
		return getClient().configMaps().inNamespace(namespace).create(configMap);
	}

Ku8ConfigMap实体如下:

package com.***.entity;

import javax.xml.bind.annotation.XmlRootElement;
import java.io.Serializable;
import java.util.Date;
import java.util.Map;

@XmlRootElement
public class Ku8ConfigMap implements Serializable {

	private static final long serialVersionUID = -2929072646302058679L;

	private Integer configMapId;
	private String name;
	private Integer namespaceId;
	private Date createTime;
	private Date updateTime;
	private Map<String, String> data;
	private String namespace;
	
	public Integer getConfigMapId() {
		return configMapId;
	}

	public void setConfigMapId(Integer configMapId) {
		this.configMapId = configMapId;
	}

	public Integer getNamespaceId() {
		return namespaceId;
	}

	public void setNamespaceId(Integer namespaceId) {
		this.namespaceId = namespaceId;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Date getCreateTime() {
		return createTime;
	}

	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}

	public Date getUpdateTime() {
		return updateTime;
	}

	public void setUpdateTime(Date updateTime) {
		this.updateTime = updateTime;
	}

	public Map<String, String> getData() {
		return data;
	}

	public void setData(Map<String, String> data) {
		this.data = data;
	}

	public String getNamespace() {
		return namespace;
	}

	public void setNamespace(String namespace) {
		this.namespace = namespace;
	}
}

在kubernetes集群查看ConfigMap创建结果:

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创建Deployment时, 挂载ConfigMap:

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后端操作:

		   // 遍历需要挂载的ConfigMap列表
                   for (VolumeDto confMap : ku8ConfMapArray) {
			ConfigMap f8ConfigMap = k8sAPIService.getConfigMapByName(namespace, confMap.getName());

			if (f8ConfigMap == null) {
				throw new BusinessException("cant find configMap:" + confMap.getName());
			}

			for (Container f8Container : f8Containers) { // 遍历需要创建的容器
				List<VolumeMount> f8VolumeMounts = f8Container.getVolumeMounts();

				if (f8VolumeMounts == null) {
					f8VolumeMounts = new ArrayList<VolumeMount>();
				}
                               // 在容器中挂载ConfigMap
				VolumeMount f8VolumeMount = new VolumeMountBuilder().withName(confMap.getName()).withMountPath(confMap.getPath()).build();

				f8VolumeMounts.add(f8VolumeMount);
				f8Container.setVolumeMounts(f8VolumeMounts);
			}

			// 将ConfigMap挂载为pod的一个volume
			List<KeyToPath> f8KeyToPathList = new ArrayList<KeyToPath>();
			f8ConfigMap.getData().forEach((k, v) -> f8KeyToPathList.add(new KeyToPathBuilder().withKey(k).withPath(k).build())); // key既为键名称又作为挂载结果的文件名称
			Volume f8Volume = new VolumeBuilder().withName(confMap.getName()).withNewConfigMap().withName(confMap.getName()).withItems(f8KeyToPathList).endConfigMap().build();
			
			f8Volumes.add(f8Volume);
		}

查看创建成功的pod:

查看 ConfigMap 挂载结果:

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