2.如何创建一个 Pod 资源

kubectl explain pod.metadata

KIND: Pod VERSION: v1 RESOURCE: metadata <Object> # metadata 是对象<Object>，下面可以有多个字段 DESCRIPTION: Standard object's metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/apiconventions.md#metadata ObjectMeta is metadata that all persisted resources must have, which includes all objects users must create. FIELDS: 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 # annotations 是注解，map 类型表示对应的值是 key-value 键值对<string,string>表示 key 和value 都是 String 类型的用 Annotation 来记录的信息包括： # build 信息、release 信息、Docker 镜像信息等，例如时间戳、release id 号、镜像 hash 值、docker # registry 地址等；日志库、监控库、分析库等资源库的地址信息；程序调试工具信息，例如工具名称、版本号等；团队的联系信息，例如电话号码、负责人名称、网址等。 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. #对象所属群集的名称。这是用来区分不同集群中具有相同名称和命名空间的资源。此字段现在未设置在任何位置，apiserver 将忽略它，如果设置了就使用设置的值 creationTimestamp <string> deletionGracePeriodSeconds <integer> deletionTimestamp <string> finalizers <[]string> generateName <string> generation <integer> labels <map[string]string> #创建的资源具有的标签 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 #labels 是标签，labels 是 map 类型，map 类型表示对应的值是 key-value 键值对，<string,string>表示 key 和 value 都是 String 类型的 managedFields <[]Object> name <string> #创建的资源的名字 namespace <string> #创建的资源所属的名称空间 Namespace defines the space within which 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 # namespaces 划分了一个空间，在同一个 namesace 下的资源名字是唯一的，默认的名称空间是default。 ownerReferences <[]Object> resourceVersion <string> selfLink <string> uid <string>

kubectl explain pod.spec

KIND: Pod VERSION: v1 RESOURCE: spec <Object> DESCRIPTION: Specification of the desired behavior of the pod. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/apiconventions.md#spec-and-status PodSpec is a description of a pod. #Pod 的 spec 字段是用来描述 Pod 的 FIELDS: activeDeadlineSeconds <integer> #表示 Pod 可以运行的最长时间，达到设置的值后，Pod 会自动停止。 affinity <Object> #定义亲和性的 automountServiceAccountToken <boolean> containers <[]Object> -required- #containers 是对象列表，用来定义容器的，是必须字段。对象列表 表示下面有很多对象，对象列 表下面的内容用 - 连接。 dnsConfig <Object> dnsPolicy <string> enableServiceLinks <boolean> ephemeralContainers <[]Object> hostAliases <[]Object> hostIPC <boolean> hostNetwork <boolean> hostPID <boolean> hostname <string> imagePullSecrets <[]Object> initContainers <[]Object> nodeName <string> nodeSelector <map[string]string> overhead <map[string]string> preemptionPolicy <string> priority <integer> priorityClassName <string> readinessGates <[]Object> restartPolicy <string> runtimeClassName <string> schedulerName <string> securityContext <Object> serviceAccount <string> serviceAccountName <string> setHostnameAsFQDN <boolean> shareProcessNamespace <boolean> subdomain <string> terminationGracePeriodSeconds <integer> tolerations <[]Object> topologySpreadConstraints <[]Object> volumes <[]Object>