Redis doesn't start when run as service - can't chdir: permission denied

I have been running redis which I built from source for several months, but I switched to using a package manger for it today (running on Debian). It ran fine until I changed the working directory to /home/redis/server. Now when starting it as a service using sudo service redis-server start, I get an error, and the following is added to the redis log:

Can't chdir to '/home/redis/server': Permission denied

Running getfacl recursively on the redis directory returns

# file: .
# owner: redis
# group: redis
user::rwx
group::rwx
other::rwx

# file: server
# owner: redis
# group: redis
user::rwx
group::rwx
other::rwx

# file: server/dump.rdb
# owner: redis
# group: redis
user::rwx
group::rwx
other::rwx

If I su to redis and run it manually, using /usr/bin/redis-server /etc/redis/redis.conf, it works correctly, so it only happens when trying to use the included init.d script.

It turns out that the init script included with Redis isn't actually used, and instead it uses /etc/systemd/system/redis.service. There are a number of security restrictions in this file, including ProtectHome=yes and limiting the directories that can be written to. I have modified this file to comment out ProtectHome=yes and to add a line ReadWriteDirectories=-/home/redis/server, and it now works correctly.

After this, run systemctl daemon-reload to reload changes before running service start redis-server.