CODEWITHSUNDEEP
dockerredisdocker-compose
Bhavya Dhiman
Bhavya Dhiman

Reputation: 237

Redis server refused to connect while using docker image

i am using docker to start using postgres, kibana, elasticsearch and redis.(using docker-compose up command). However redis failed to start giving this error.

You can see read the last error line in the screenshot(showing bad file format). How can i resolve this? Also i dont know how to run redis commands in terminal using docker such as ./redis-check-aof --fix as given in screenshot?

Upvotes: 3

Views: 2663

Answers (3)

YTZ
YTZ

Reputation: 938

I'd like to add some additional information regarding this issue with a redis:7 docker container after rebuilding a server from a snapshot.

  • Redis stores append-only files in a dedicated directory, as defined by the appenddirname parameter in the config (defaults to appendonlydir).
  • Running the docker compose command gives a dialog box which requires a y/N response (you don't actually see the Continue [y/N] after you've pressed a key; strange but true). After pressing y you will see a message that it's succesfully truncated.
$ docker compose run --rm -it redis redis-check-aof --fix /data/appendonlydir/appendonly.aof.18.incr.aof

Start checking Old-Style AOF
AOF /data/appendonlydir/appendonly.aof.18.incr.aof format error
AOF analyzed: filename=/data/appendonlydir/appendonly.aof.18.incr.aof, size=25858048, ok_up_to=25857792, ok_up_to_line=511436, diff=256
This will shrink the AOF /data/appendonlydir/appendonly.aof.18.incr.aof from 25858048 bytes, with 256 bytes, to 25857792 bytes
y
Continue? [y/N]: Successfully truncated AOF /data/appendonlydir/appendonly.aof.18.incr.aof
  • If you try to fix it again after already being fixed, it (hopefully) shows the file being valid.
Start checking Old-Style AOF
AOF analyzed: filename=/data/appendonlydir/appendonly.aof.18.incr.aof, size=25857792, ok_up_to=25857792, ok_up_to_line=511436, diff=0
AOF /data/appendonlydir/appendonly.aof.18.incr.aof is valid

Then up your redis like normally, and if everything went well, you should have a working container again.

Upvotes: 1

Archonic
Archonic

Reputation: 5362

Like Uku mentions, the AOF file has become corrupted and you should run a command to fix it. The correct command for the official Redis redis:4.0.11-alpine image is:

docker-compose run redis redis-check-aof --fix appendonly.aof

This assumes the name of your redis container is "redis". Hit "y" to confirm (it's not phrased like a question but it needs that input.

Upvotes: 7

Uku Loskit
Uku Loskit

Reputation: 42030

EDIT: Your redis AOF file has become corrupted. Two options:

1) if you don't care about the data, you could just delete the volume and recreate it

2) if you do care about the data, temporarily add the entrypoint definition for redis service:

entrypoint:
 - redis-check-aof
 - --fix
 - /data/appendonly.aof

docker-compose up once, and then remove it, this should hopefully fix it

Upvotes: 0

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