Revision as of 20:05, 27 October 2018

Principais Conceitos

Definição:

O Kubernetes é um orquestrador de contêineres para provisionar, gerenciar e dimensionar aplicativos. Em outras palavras, o Kubernetes permite gerenciar o ciclo de vida

de aplicativos conteinerizados em um cluster de nós (que é uma coleção de máquinas de trabalho).

O que o Kubernets prove?:

* Provisões e escalonamento de aplicativos

* Gerencia o ciclo de vida de aplicativos conteinerizados em um cluster de nós

* Organiza a infraestrutura de computação, rede e armazenamento de cargas de trabalho do usuário

Modelo Declarativo

O principal paradigma do Kubernetes é seu modelo declarativo. O usuário fornece o estado desejado e o Kubernetes fará o melhor para que isso aconteça. Case você precise

de cinco instâncias, não inicie cinco instâncias separadas, mas diga ao Kubernetes que precisa de cinco instâncias, e o Kubernetes irá reconciliar o estado automaticamente.

Arquitetura do Kubernets

O Kubernetes é um armazém de dados (etcd). O modelo declarativo é armazenado no etcd como objetos, e isso significa que quando você deseja cinco instâncias de um

contêiner, essa solicitação é armazenada no etcd. Um gatilho é disparado para os Controllers para executar uma ação. Em seguida, os controladores reagem ao modelo

e tentam agir para atingir o estado desejado, criando os recursos para execução da aplicação.

Kubernetes resource model

O Kubernetes define um recurso para cada finalidade.

* Config maps: holds configuration data for pods to consume

* Daemon sets: ensures that each node in the cluster runs this pod

* Deployments: defines a desired state of a deployment object

* Events: provides life cycle events on pods and other deployment objects

* Endpoints: allows an inbound connections to reach the cluster services

* Ingress: a collection of rules that allows inbound connections to reach the cluster services

* Jobs: creates one or more pods and when they complete successfully, the job is marked as completed

* Node: a worker machine in Kubernetes

* Namespaces: multiple virtual clusters backed by the same physical cluster

* Pods: the smallest deployable units of computing that can be created and managed in Kubernetes

* Persistent volumes: provides an API for users and administrators to abstract details about how storage is provided from how it is consumed

* Replica sets: ensures that a specified number of pod replicas are running at any given time

* Secrets: holds sensitive information, such as passwords, OAuth tokens, and SSH keys

* Service accounts: provides an identity for processes that run in a pod

* Services: an abstraction that defines a logical set of pods and a policy by which to access them, sometimes called a microservice

* Stateful sets: the workload API object that manages stateful applications

Ver também

@@ Line 6: / Line 6: @@
 '''O que o Kubernets prove?''':
-* Provisões e escalonamento de aplicativos
+: * Provisões e escalonamento de aplicativos
-* Gerencia o ciclo de vida de aplicativos conteinerizados em um cluster de nós
+: * Gerencia o ciclo de vida de aplicativos conteinerizados em um cluster de nós
-* Organiza a infraestrutura de computação, rede e armazenamento de cargas de trabalho do usuário
+: * Organiza a infraestrutura de computação, rede e armazenamento de cargas de trabalho do usuário
-*
 '''Modelo Declarativo'''
 : O principal paradigma do Kubernetes é seu modelo declarativo. O usuário fornece o estado desejado e o Kubernetes fará o melhor para que isso aconteça. Case você precise
@@ Line 24: / Line 24: @@
 :O Kubernetes define um recurso para cada finalidade.
-* Config maps: holds configuration data for pods to consume
+: * Config maps: holds configuration data for pods to consume
-* Daemon sets: ensures that each node in the cluster runs this pod
+: * Daemon sets: ensures that each node in the cluster runs this pod
-* Deployments: defines a desired state of a deployment object
+: * Deployments: defines a desired state of a deployment object
-* Events: provides life cycle events on pods and other deployment objects
+: * Events: provides life cycle events on pods and other deployment objects
-* Endpoints: allows an inbound connections to reach the cluster services
+: * Endpoints: allows an inbound connections to reach the cluster services
-* Ingress: a collection of rules that allows inbound connections to reach the cluster services
+: * Ingress: a collection of rules that allows inbound connections to reach the cluster services
-* Jobs: creates one or more pods and when they complete successfully, the job is marked as completed
+: * Jobs: creates one or more pods and when they complete successfully, the job is marked as completed
-* Node: a worker machine in Kubernetes
+: * Node: a worker machine in Kubernetes
-* Namespaces: multiple virtual clusters backed by the same physical cluster
+: * Namespaces: multiple virtual clusters backed by the same physical cluster
-* Pods: the smallest deployable units of computing that can be created and managed in Kubernetes
+: * Pods: the smallest deployable units of computing that can be created and managed in Kubernetes
-* Persistent volumes: provides an API for users and administrators to abstract details about how storage is provided from how it is consumed
+: * Persistent volumes: provides an API for users and administrators to abstract details about how storage is provided from how it is consumed
-* Replica sets: ensures that a specified number of pod replicas are running at any given time
+: * Replica sets: ensures that a specified number of pod replicas are running at any given time
-* Secrets: holds sensitive information, such as passwords, OAuth tokens, and SSH keys
+: * Secrets: holds sensitive information, such as passwords, OAuth tokens, and SSH keys
-* Service accounts: provides an identity for processes that run in a pod
+: * Service accounts: provides an identity for processes that run in a pod
-* Services: an abstraction that defines a logical set of pods and a policy by which to access them, sometimes called a microservice
+: * Services: an abstraction that defines a logical set of pods and a policy by which to access them, sometimes called a microservice
-* Stateful sets: the workload API object that manages stateful applications
+: * Stateful sets: the workload API object that manages stateful applications