Questions[aws-ec2](server)

Hi I have following docker-compose.yaml file.

version: "3.9"

volumes:
  local_postgres_data2: {}
  local_postgres_data_backups2: {}

services:
  postgres:
    image: postgres
    container_name: angel-postgres
    restart: always
    volumes:
      - local_postgres_data2:/var/lib/postgresql/data:Z
      - local_postgres_data_backups2:/backups:z
    environment:
      POSTGRES_DB: angel-agility
      POSTGRES_HOST: localhost
      POSTGRES_USER: angel-user
      POSTGRES_PASSWORD: angel123
    ports:
      - "5432:5432"

  redis:
    container_name: angel-redis
    image: redis:latest
    ports:
      - '6379:6379'
    restart: unless-stopped

When I run docker-compose up I get error in logs for Redis:

2276:C 29 Mar 2022 20:32:52.005 # Failed opening the RDB file crontab (in server root dir /etc) for saving: Permission denied
1:M 29 Mar 2022 20:32:52.105 # Background saving error

I tried all the solutions on different platforms but couldn't make Redis work. A clue or direction make it work will be highly appreciated.

Also a little brief about the problem in detail why its happening would also be great help for readers and me. Looking forward.

MySql server doesn't seem to be scale up correctly when scaling up my AWS instance. Its almost like MySql is cacheing the instance sizes.

This happens after a scale down the AWS instance and then when we scale back up the the AWS instance, the MySQL server seems to remain in the smaller state even though the AWS instance has doubled in RAM and CPU

Any suggestions?

We create automatically EC2 instances as ReviewApps. The reviewer are supposed to destroy the ec2 instances but this doens't happen always.

So i would like to script (Lambda, Terraform, etc?) that EC2 instances for this specific AWS user are get automatically destroyed after X days. Is there are known execution?

Given the OwnerId field returned from an AWS ami query such as:

$ aws ec2 describe-images --image-ids ami-015f906ef3e2123c0 --region ap-southeast-2 --query Images[].OwnerId
[
    "602401143452"
]

how can I retrieve some information about who the owner actually is. The OwnerId means nothing to me.

I think the answer is no, but I want to make sure that I'm not missing anything. Is it possible for an EC2 instance to have IP addresses in more than one VPC at the same time?

I tried creating 2 VPCs, and then two network interfaces, one in each VPC, but it seems it's not possible to attach them to the same EC2 instance because it's not possible to attach them to an instance that's not on that VPC, is this correct?

For example, I create vpc1 and eni1 (network interface) in vpc1. Then I create vpc2 and eni2 in vpc2. Then I create ec21 (an EC2 instance) and put it in vpc1 with eni1 as its network interface. When I open eni2 and I select attach, I can't select ec21, it says:

No running or stopped instances in us-esat-1f in vpc2.