Redis
This page provides instructions for deploying Redis with Portworx on Docker standalone.
Create a storage volume for Redis
To create a Portworx storage volume for Redis, use the docker volume create
command:
docker volume create -d pxd --name=redis_vol --opt \
size=4 --opt block_size=64 --opt repl=1 --opt fs=ext4
Start the Redis container
To start the Redis container using the redis_vol
volume created above, run the command below. (Use the Docker `-v’ option to attach the Portworx volume to the /data
directory, which is where Redis stores its data).
docker run --name some-redis -v redis_vol:/data --volume-driver=pxd -d redis redis-server --appendonly yes
Your Redis container is now available for use on port 6379.
Start the redis CLI client container
docker run -it --link some-redis:redis --rm redis redis-cli -h redis -p 6379
Populate the redis instance with some data
set foo 100
OK
incr foo
(integer) 101
append foo abcxxx
(integer) 9
get foo
"101abcxxx"
redis:6379>
Kill the "some-redis" instance
docker kill some-redis
Start a new redis-server instance with volume persistence
Start another redis-server container called other-redis
using the original redis_vol
to show data persistence.
docker run --name other-redis -v redis_vol:/data --volume-driver=pxd -d redis redis-server --appendonly yes
Start a redis CLI container
Connect to the new other-redis
container with the following command.
docker run -it --link other-redis:redis --rm redis redis-cli -h redis -p 6379
See that the original data has persisted
get foo
"101abcxxx"
Create snapshot of your volume
You can create container-granular snapshots, by saving just this container’s state. Snapshots are then immediately available as a volume.
Create a snapshot of the redis_vol
volume using pxctl
.
pxctl volume list
ID NAME SIZE HA STATUS
416765532972737036 redis_vol 2.0 GiB 1 up - attached on xxxxxxxx-xxxx-xxxx-xxxx-7b7cd5306b28
pxctl volume snapshot 416765532972737036
Volume successfully snapped: 3291428813175937263
Update the volume with new data
docker run -it --link other-redis:redis --rm redis redis-cli -h redis -p 6379
get foo
"101abcxxx"
set foo foobar
OK
get foo
"foobar"
See that the snapshot volume still contains the original data
docker run --name snap-redis -v 3291428813175937263:/data --volume-driver=pxd -d redis redis-server --appendonly yes
940d2ad6b87df9776e26d29e746eb05fb6081c0e6019d46ba77915d7c8305308
docker run -it --link snap-redis:redis --rm redis redis-cli -h redis -p 6379
get foo
"101abcxxx"
redis:6379>