目录
一 Pod资源清单
1 Pod分类（非官方）
Pod 定义测试Pod
ReplicationController 副本控制器
ReplicaSet 副本集控制器
Deployment 无状态副本集
StatefulSet 有状态副本集
DaemonSet 守护Pod
Job、Cronjob 作业
HPA：Horizontal Pod Autoscaling
2 Pod的创建方式
- 基于命令行创建Pod
- 基于资源清单创建Pod，资源清单为yaml格式
3 命令行创建Pod
# kubectl run nginx-deploy --image=nginx:1.14-alpine --port=80 --replicas=1 --dry-run=true <测试运行是否报错>
# kubectl run nginx-deploy --image=nginx:1.14-alpine --port=80 --replicas=1 <创建Pod>
4 资源清单
4.1 资源清单定义获方法
# kubectl explain pods
KIND: Pod
VERSION: v1
DESCRIPTION:
Pod is a collection of containers that can run on a host. This resource is
created by clients and scheduled onto hosts.
FIELDS:
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
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 <Object>
Standard object's metadata. More info:
https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
spec <Object>
Specification of the desired behavior of the pod. More info:
https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status
status <Object>
Most recently observed status of the pod. This data may not be up to date.
Populated by the system. Read-only. More info:
https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status
# kubectl explain pods.metadata
KIND: Pod
VERSION: v1
RESOURCE: metadata <Object>
DESCRIPTION:
Standard object's metadata. More info:
https://git.k8s.io/community/contributors/devel/api-conventions.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
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.
......
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
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
.....
# kubectl explain pods.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/api-conventions.md#spec-and-status
PodSpec is a description of a pod.
FIELDS:
activeDeadlineSeconds <integer>
Optional duration in seconds the pod may be active on the node relative to
StartTime before the system will actively try to mark it failed and kill
associated containers. Value must be a positive integer.
affinity <Object>
If specified, the pod's scheduling constraints
automountServiceAccountToken <boolean>
AutomountServiceAccountToken indicates whether a service account token
should be automatically mounted.
containers <[]Object> -required-
List of containers belonging to the pod. Containers cannot currently be
added or removed. There must be at least one container in a Pod. Cannot be
updated.
......
volumes <[]Object>
List of volumes that can be mounted by containers belonging to the pod.
More info: https://kubernetes.io/docs/concepts/storage/volumes
# kubectl explain pods.spec.containers
4.2 Pod资源清单
apiVersion: v1
kind: Pod
metadata:
name: myapp
namespace: default
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
4.3 ReplicaSet资源清单
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: myapp
namespace: default
spec:
replicas: 2
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
name: myapp-pod
labels:
app: myapp
release: canary
environment: qa
spec:
containers:
- name: myapp-containers
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
4.4 Deployment资源清单
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deploy
namespace: default
spec:
replicas: 3
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp
image: ikubernetes/myapp:v1
ports:
- name: http
containerPort: 80
4.5 DaemonSet资源清单
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: myapp-ds
namespace: default
spec:
selector:
matchLabels:
app: myapp
release: canary
template:
metadata:
labels:
app: myapp
release: canary
spec:
containers:
- name: myapp-containers
image: ikubernetes/myapp:v2
ports:
- name: http
containerPort: 80
4.6 内网测试环境服务资源清单
apiVersion: apps/v1
kind: Deployment
metadata:
name: admin-aws
namespace: default
spec:
replicas: 1
selector:
matchLabels:
service: aws
module: admin
template:
metadata:
labels:
service: aws
module: admin
spec:
containers:
- name: aws
image: registry.cn-beijing.aliyuncs.com/sioeye_disney/youle_admin_aws:$COMMITID
ports:
- name: http
containerPort: 8004
volumeMounts:
- name: config
mountPath: /sioeye_apps/workspace/startup_jar.sh
subPath: startup_jar.sh
- name: logs
mountPath: /sioeye_apps/logs
imagePullSecrets:
- name: docker-aliyun
volumes:
- name: config
configMap:
name: config-aws
- name: logs
hostPath:
path: /Sioeye/Data/logs/youle_admin_aws
type: DirectoryOrCreate