logging

# 1 Attach Policy

#  https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-using-import-tool-cli-cloudwatch-iam-role.html





{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "logs:CreateLogGroup",
                "logs:CreateLogStream",
                "logs:DescribeLogStreams",
                "logs:PutLogEvents"
            ],
            "Resource": [
                "arn:aws:logs:REGION:ACCOUNT:log-group:/aws/cognito/*"
            ]
        }
    ]    
}


# https://docs.docker.com/config/containers/logging/awslogs/

2. docker run --name eureka-server --log-driver=awslogs --log-opt awslogs-region=us-east-1 --log-opt awslogs-group="eureka-server" --log-opt awslogs-stream="eureka-server-log-stream" -p 8080:8761 --restart unless-stopped  -id imageid:tag


# http://mvpjava.com/docker-logging-symlink-hack/
# https://youtu.be/TFCua2yj09Y

3. Dockerfile best practices for logs

# always check that your app should not write to docker file system, because the size of that container is going to grow

https://hub.docker.com/r/mvpjava/java-docker-logging

docker container run -d --rm --name java-docker-log-demo-to-file mvpjava/java-docker-logging:to-file

docker container run -d --rm --name java-docker-log-demo-sym-links mvpjava/java-docker-logging:symbolic-links


_______________________
watch docker ps -as
_______________________
---> Simply create Symbolic Links

RUN ln -sf /dev/stdout /log/server.log \
 && ln -sf /dev/stderr /log/server.log