Crie um projeto
faca o upload do seu projeto junto com o docker file para realizar o build
docker build -t webapp .
registre o build e coloque tag conforme o docker mesmo
docker tag webapp gcr.io/<nomedoprojeto/nome_imagem
coloque a imagem no google registry
docker push gcr.io/<nomedoprojeto/nome_imagem
A imagem deve ficar no google registry e depois pode ser usada
CRIAR UM CLUSTER - STANDARD
CRIAR UM DEPLOYMENT DEFINIR AS VARIAVEIS DE AMBIENTE E CRIAR
DEPOIS CRIAR UM SERVICO USANDO O EXPOSE PARA EXPOR A APLICACAO QUE CRIA UM LOAD-BALANCE
Fazer o deploy de um flask no GKE
Criar os arquivos e o Dockerfile
root@Notebook-119 MINGW64 ~/Desktop/Google_cloud_kubernets (master)
$ ls
Dockerfile app.py requirements.txt
Dockerfile
# Use the official Python image as base
FROM python:3.9-slim
# Set the working directory in the container
WORKDIR /app
# Copy the requirements file into the container at /app
COPY requirements.txt .
# Install any dependencies specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt
# Copy the current directory contents into the container at /app
COPY . .
# Expose port 5000 to the outside world
EXPOSE 5000
# Define environment variable
ENV NAME World
# Run the command to start the Flask app
CMD ["python", "app.py"]
No GKE
Criar projeto
ativar api e services - clicar em ativas
Ativar o repo de imagens do google
Fazer o upload do arquivo de software
EDITAR O CODE
BUILD DA IMAGEM DOCKER
lucasfontiniemail@cloudshell:~/Google_cloud_kubernets (kubernetsproject-396820)$ docker run -p 5000:5000 --rm webapp
* Serving Flask app 'app' (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
* Running on all addresses (0.0.0.0)
* Running on http://127.0.0.1:5000
* Running on http://172.18.0.2:5000
Press CTRL+C to quit
172.18.0.1 - - [26/Aug/2023 18:21:56] "GET /?authuser=0&redirectedPreviously=true HTTP/1.1" 200 -
172.18.0.1 - - [26/Aug/2023 18:21:56] "GET /favicon.ico HTTP/1.1" 404 -
Criar tag e fazer push da imagem
^Clucasfontiniemail@cloudshell:~/Google_cloud_kubernets (kubernetsproject-396820)$ docker tag webapp gcr.io/kubernetsproject-396820/webapp
lucasfontiniemail@cloudshell:~/Google_cloud_kubernets (kubernetsproject-396820)$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
gcr.io/kubernetsproject-396820/webapp latest bc1cbce51ef2 4 minutes ago 137MB
webapp latest bc1cbce51ef2 4 minutes ago 137MB
lucasfontiniemail@cloudshell:~/Google_cloud_kubernets (kubernetsproject-396820)$ docker push gcr.io/kubernetsproject-396820/webapp
Using default tag: latest
The push refers to repository [gcr.io/kubernetsproject-396820/webapp]
84563cddce18: Pushed
f693eea5accc: Pushed
fe5263f9e9b0: Pushed
67d75e9ea9c4: Pushed
306501a1867a: Layer already exists
1fb96758506b: Layer already exists
28d1d60b1313: Layer already exists
5b60283f3630: Layer already exists
511780f88f80: Layer already exists
latest: digest: sha256:0f7bb02ee945780838d6e6fa08e6eb8af7c29afa04eb5ce18ed43e0f67ce782c size: 2201
lucasfontiniemail@cloudshell:~/Google_cloud_kubernets (kubernetsproject-396820)$
Criado a imagem
Criar cluster
apiVersion: apps/v1
kind: Deployment
metadata:
name: flask-app-deployment
spec:
replicas: 2 # Você pode ajustar o número de réplicas conforme necessário
selector:
matchLabels:
app: flask-app
template:
metadata:
labels:
app: flask-app
spec:
containers:
- name: flask-app
image: gcr.io/PROJECT_ID/flask-app:v1
ports:
- containerPort: 5000
kubectl apply -f deployment.yaml
service.yaml
apiVersion: v1
kind: Service
metadata:
name: flask-app-service
spec:
selector:
app: flask-app
ports:
- protocol: TCP
port: 80
targetPort: 5000
type: LoadBalancer
kubectl apply -f service.yaml
kubectl get service flask-app-service
AVANCADO
Deploy do cluster via cli
gcloud container clusters create-auto nome_clueste --region us-east1
o KUBERNETES TEM DNS LOCAL
kubectl get namespaces
kubectl get services -n kube-system
PERRSISTENCIA DE DADOS VOLUMES
CRIAR ENV VARS
KUBECTL GET SECRETS
KUBECTL CREATE SECRET GENERIC MYSQL --FROM-LITERAL=PASSWORD=SENHA
SCALE
Escalonamento horizontal
HPA DEFINI O NUMERO DE REPLICAS DEPENDENDO DO TARGET CPE SE ATINGIR O LIMITE
kubectl get hpa
EXEMPLO
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
name: php-apache
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: php-apache
minReplicas: 1
maxReplicas: 10
metrics:
- type: Resource
resource:
name: cpu
target:
type: Utilization
averageUtilization: 50
status:
observedGeneration: 1
lastScaleTime: <some-time>
currentReplicas: 1
desiredReplicas: 1
currentMetrics:
- type: Resource
resource:
name: cpu
current:
averageUtilization: 0
averageValue: 0
