How to Update Graylog version in docker - docker

Question

I am new to graylog, I have installed graylog in docker and after installing it I observed 2 notifications one is related to Graylog Upgrade. Can someone tell me how to update it using docker commands?
Note: First in need to take backup of my data and then I need to update it to version 2.4.6.
Note 2: I have already referred the documentation in graylog.
http://docs.graylog.org/en/2.4/pages/upgrade.html
http://docs.graylog.org/en/2.4/pages/installation/docker.html
Graylog Installation process:
docker run --name mongo -d mongo:3
docker run --name elasticsearch \
-e "http.host=0.0.0.0" -e "xpack.security.enabled=false" \
-d docker.elastic.co/elasticsearch/elasticsearch:5.6.2
docker run --link mongo --link elasticsearch \
-p 9000:9000 -p 12201:12201 -p 514:514 \
-e GRAYLOG_WEB_ENDPOINT_URI="http://127.0.0.1:9000/api" \
-d graylog/graylog:2.4.0-1

Answer 1

To use the latest version change the tag of the graylog image from 2.4.0-1 to 2.4 or 2.4.6-1
Seems like the documentation you found is not completely in line with the documentation on docker hub:
If you simply want to checkout Graylog without any further customization, you can run the following three commands to create the necessary environment:
docker run --name mongo -d mongo:3
docker run --name elasticsearch \
-e "http.host=0.0.0.0" -e "xpack.security.enabled=false" \
-d docker.elastic.co/elasticsearch/elasticsearch:5.6.12
docker run --link mongo --link elasticsearch \
-p 9000:9000 -p 12201:12201 -p 514:514 \
-e GRAYLOG_WEB_ENDPOINT_URI="http://127.0.0.1:9000/api" \
-d graylog/graylog:2.4

Answer 2

First i have installed graylog with my own volumes
docker run --link mongo --link elasticsearch \
-p 9000:9000 -p 12201:12201 -p 514:514 \
-e GRAYLOG_WEB_ENDPOINT_URI="http://127.0.0.1:9000/api" \
-d graylog/graylog:2.4.0-1
Now stop graylog using
docker stop [graylog Container ID]
Now remove container from docker
docker rm [graylog Container ID]
Now Remove docker image
docker rmi [graylog Image ID]
Now again install graylog by changing the graylog version
docker run --link mongo --link elasticsearch \
-p 9000:9000 -p 12201:12201 -p 514:514 \
-e GRAYLOG_WEB_ENDPOINT_URI="http://127.0.0.1:9000/api" \
-d graylog/graylog:2.4.6-1
Note: Only remove graylog not mongoDB/Elasticsearch. Then you won't loose any data.