Kubernetes: Usando Kubernetes na IBM Cloud: Difference between revisions
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1) Começando o Lab3 | 1) Começando o Lab3 | ||
cd .. | cd ../Lab3 | ||
==Construindo as images do Watson== | ==Construindo as images do Watson== | ||
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docker push registry.ng.bluemix.net/<namespace>/watson-talk | docker push registry.ng.bluemix.net/<namespace>/watson-talk | ||
3) | 3) Edite o arquivo '''watson-deployment.yml''' e altere a tag '''<namespace>''' para a que você está utilizando | ||
Edite o arquivo watson-deployment.yml e altere a tag '''<namespace>''' | |||
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ibmcloud login | ibmcloud login | ||
Se quiser alterar execute | Se quiser alterar execute o comando '''ibmcloud target --cf''' | ||
2) Criando o serviço | 2) Criando o serviço | ||
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ibmcloud cf services | ibmcloud cf services | ||
== | ==Bind do serviço para o Cluster== | ||
Execute | |||
ibmcloud cs cluster-service-bind <name-of-cluster> default tone | |||
Verifique os secrets criado pelo comando anterior | |||
kubectl get secrets. | |||
==Criando pods e services== | |||
Now that the service is bound to the cluster, you want to expose the secret to your pod so that it can utilize the service. To do this, create a secret datastore as a part of your deployment configuration. This has been done for you in watson-deployment.yml: | |||
volumeMounts: | |||
- mountPath: /opt/service-bind | |||
name: service-bind-volume | |||
volumes: | |||
- name: service-bind-volume | |||
secret: | |||
defaultMode: 420 | |||
secretName: binding-tone | |||
# from the kubectl get secrets command above | |||
Build the application using the yaml. | |||
kubectl create -f watson-deployment.yml | |||
Verify the pod has been created: | |||
kubectl get pods | |||
Your secret has now been created. Note that for this lab, this has been done for you. | |||
Putting it all together - Run the application and service | |||
By this time you have created pods, services, and volumes for this lab. | |||
You can open the Kubernetes dashboard and explore all the new objects created or use the following commands. | |||
kubectl get pods | |||
kubectl get deployments | |||
kubectl get services | |||
Get the public IP for the worker node to access the application: | |||
ibmcloud cs workers <name-of-cluster> | |||
Now that the you have the container IP and port, go to your favorite web browser and launch the following URL to analyze the text and see output. | |||
http://<public-IP>:30080/analyze/"Today is a beautiful day" | |||
If you can see JSON output on your screen, congratulations! You are done with this lab! | |||
= Ver também = | = Ver também = |
Revision as of 15:40, 28 October 2018
Existe um curso sobre Kubernetes na IBM Cloud, o link é o seguinte https://courses.cognitiveclass.ai/
Os exemplos do curso estão no GitHub https://github.com/IBM/container-service-getting-started-wt
Importante: os comandos bx ou bluemix foram depreciados, agora utilizar o comando ibmcloud
Pré-requisitos
1) Instalando os pré-requisitos no MacOS
brew install kubectl brew cask install ibm-cloud-cli brew install cfssl brew install docker
2) Login na IBM Cloud
ibmcloud login
Para Login Federado ou para Funcionário IBM use "ibmcloud login -sso"
3) Adicionando os plugins para criar e gerenciar clusters Kubernetes
ibmcloud plugin install container-service -r Bluemix ibmcloud plugin install container-registry -r Bluemix
4) Listando plug-ins instalados...
ibmcloud plugin list
Provisionando um Cluster na IBM Cloud
- Via linha de comando
ibmcloud cs cluster-create --name <name-of-cluster>
- Via console
- Vá no endereço https://console.bluemix.net/catalog/ e localize a entrada IBM Cloud Kubernetes Service.
Deploy da sua Primeira aplicação no IBM Cloud
No Lab1, temos o deploy de uma aplicação que exibe o hostname. Os arquivos principais do lab são:
- Dockerfile : define os atributos da image. Busca uma image com o Node.js e instala a aplicação app.js
- app.js : Aplicação em Node.js que pronta o hostmame
- package.json: define as dependências necessários pela aplicação app.js
Clonando os exemplos do Github
mkdir Curso cd Curso git clone https://github.com/IBM/container-service-getting-started-wt.git
Push da imagem para o IBM Cloud Container Registry
1) Começando o Lab1
cd Lab1
2) Login na IBM Cloud
ibmcloud login --sso
3) Login na IBM Cloud Container Registry.
ibmcloud cr login
4) Criando uma namespace
ibmcloud cr namespace-add <my_namespace>
namespaces é um forma de organização de cluster. No dia a dia, seria projeto1_prod, projeto1_dev, projeto2_prod, ...
5) Criando uma docker image
docker build --tag registry.ng.bluemix.net/<my_namespace>/hello-world:1 .
6) Verificando a imagem
docker images
7) Fazendo o push da image
docker push registry.ng.bluemix.net/<my_namespace>/hello-world:1
8) Verifique que o cluster está pronto pra uso
ibmcloud cs clusters
verificar se o estado está NORMAL
ibmcloud cs workers <yourclustername>
Verifica se os workers estão no estado NORMAL com o status READY
Anotar o ip público do worker.
Deploy da aplicação
1) Execute o comando e defina as variáveis de ambiente
ibmcloud cs cluster-config <yourclustername>
Exemplo no Mac:
export KUBECONFIG=/Users/<user_name>/.bluemix/plugins/container-service/clusters/pr_firm_cluster/kube-config-prod-par02-pr_firm_cluster.yml
2) Iniciando a aplicação
kubectl run hello-world --image=registry.ng.bluemix.net/<my_namespace>/hello-world:1
3) Verifique o status pelo comando
kubectl get pods
4) Quando o status estiver como RUNNING, execute
kubectl expose deployment/hello-world --type="NodePort" --port=8080
Com o navegador, acesse o ip e porta para visualizar
Outros comandos: Para achar a porta, Para remover o Deployment , Para remover o Service
Escalando e atualizando aplicações -- services, replica sets e health checks
1) Começando o Lab2
cd .. cd Lab2
Adicionando Replicas
- Adicionando replicas via linha de comando
Adicionando via linha de comando
$ kubectl scale --replicas=10 deployment hello-world
- Adicionando replicas via arquivo de configuração
Adicionando via edição da configuração
kubectl edit deployment/<name-of-deployment>
Alterar o item replicas
... spec: replicas: 1
Salve e feche o arquivo
Verificando o rollout da alteração
Verificando o rollout da alteração
kubectl rollout status deployment/hello-world
Após o rollout verifique se os pods estão executando.
kubectl get pods
o STATUS deve ser RUNNING.
Deploy de uma aplicação com IBM Watson
1) Começando o Lab3
cd ../Lab3
Construindo as images do Watson
1) Build das images
docker build -t registry.ng.bluemix.net/<namespace>/watson ./watson docker build -t registry.ng.bluemix.net/<namespace>/watson-talk ./watson-talk
2) push da image Watson para o IBM Cloud Container Registry.
docker push registry.ng.bluemix.net/<namespace>/watson docker push registry.ng.bluemix.net/<namespace>/watson-talk
3) Edite o arquivo watson-deployment.yml e altere a tag <namespace> para a que você está utilizando
Criando uma instância do Watson service
1) Verifique o space e o org
ibmcloud login
Se quiser alterar execute o comando ibmcloud target --cf
2) Criando o serviço
ibmcloud cf create-service tone_analyzer standard tone
onde tone é o nome do serviço
Note: When you add the Tone Analyzer service to your account, a message is displayed that the service is not free. If you limit your API calls, this course does not incur charges from the Watson service.
3) Conferindo se o serviço foi criado
ibmcloud cf services
Bind do serviço para o Cluster
Execute
ibmcloud cs cluster-service-bind <name-of-cluster> default tone
Verifique os secrets criado pelo comando anterior
kubectl get secrets.
Criando pods e services
Now that the service is bound to the cluster, you want to expose the secret to your pod so that it can utilize the service. To do this, create a secret datastore as a part of your deployment configuration. This has been done for you in watson-deployment.yml:
volumeMounts: - mountPath: /opt/service-bind name: service-bind-volume volumes: - name: service-bind-volume secret: defaultMode: 420 secretName: binding-tone # from the kubectl get secrets command above
Build the application using the yaml.
kubectl create -f watson-deployment.yml
Verify the pod has been created:
kubectl get pods
Your secret has now been created. Note that for this lab, this has been done for you.
Putting it all together - Run the application and service
By this time you have created pods, services, and volumes for this lab.
You can open the Kubernetes dashboard and explore all the new objects created or use the following commands.
kubectl get pods kubectl get deployments kubectl get services
Get the public IP for the worker node to access the application:
ibmcloud cs workers <name-of-cluster>
Now that the you have the container IP and port, go to your favorite web browser and launch the following URL to analyze the text and see output.
http://<public-IP>:30080/analyze/"Today is a beautiful day"
If you can see JSON output on your screen, congratulations! You are done with this lab!