Data in Docker

#Data_in_Docker

#Volume

Data

There is essentially three types of data in Docker -> also in connection with [[Volumes]]

Application Data

1. Data added to the image and container in the build phase

2. Cant be changed once the image is built

3. Example: source code of application

Temporary Data

1. Data is updated while interaction

2. Fetched/produced in running container

3. No effect in loosing the data once the container is shutdown

4. Dynamic and changing but clears regularly

5. Need read + write permission temporarily, hence data is stored in containers layer

Permanent Data

1. Fetched/produced in running container

2. Stored in files or in a database

3. Must not be lost if container stops or restarts

4. Read + write permission is required

Data will not be removed from a container if you just stop the container or the container restarts

All the containers will different file system, hence if there is any files that are updated in one container that same scenario cannot be seen in another container