Failed to start Redis Datastore Server (Ubuntu 16.04.1 LTS)

Question

i just installed redis and it doesnt work at all when trying to start service with command:

sudo service redis-server start

this is result of journalctl -xe:

Subject: Unit redis-server.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit redis-server.service has finished shutting down.
Mar 02 13:22:46 aaa-notebook systemd[1]: redis-server.service: Start request repeated too quickly.
Mar 02 13:22:46 aaa-notebook systemd[1]: Failed to start Redis Datastore Server.

and this is the result of systemctl status redis-server.service:

 redis-server.service - Redis Datastore Server
 Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
 Active: inactive (dead) (Result: resources) since Kam 2017-03-02 13:22:46 WIB; 5min ago
 Process: 12120 ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf (code=exited, status=0/SUCCESS)

Mar 02 13:22:46 aaa-notebook systemd[1]: Failed to start Redis Datastore Server.
Mar 02 13:22:46 aaaaa-notebook systemd[1]: redis-server.service: Unit entered failed state.
Mar 02 13:22:46 aaa-notebook systemd[1]: redis-server.service: Failed with result 'resources'.
Mar 02 13:22:46 aaa-notebook systemd[1]: redis-server.service: Service hold-off time over, scheduling restart.
Mar 02 13:22:46 aaa-notebook systemd[1]: Stopped Redis Datastore Server.
Mar 02 13:22:46 aaa-notebook systemd[1]: redis-server.service: Start request repeated too quickly.
Mar 02 13:22:46 aaa-notebook systemd[1]: Failed to start Redis Datastore Server.

Answer 1

I had the same issue and could not find a working solution anywhere. After some searching, the following fix worked for me ( Ubuntu 16.04 )

In /etc/systemd/system/redis.service add the following under the [Service] section.

Type=forking

Answer 2

Open your service using whatever editor.

vim /etc/systemd/system/redis.service

Look at your [Service] section at ExecStart mine was:

ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf

Run this command to see what errors are occuring. Mine responded with this:

 Fatal error, can't open config file '/etc/redis/redis.conf'

So I just updated that line to this (where my actual config file was)

ExecStart=/usr/local/bin/redis-server /etc/redis/6379.conf

Which is where redis quickstart places it by default... :)

Answer 3

In my case , the log directory (/var/log/redis) which I mention in /etc/redis/redis.conf file was not present

How I find the error

Try

/usr/local/bin/redis-server /etc/redis/redis.conf

This is same command present in my /etc/systemd/system/redis.service file

ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf

Solution

1) Create the log directory

sudo mkdir -p /var/log/redis

2) Give proper access to create and write logs

sudo chown redis:redis /var/log/redis

Try to start the service again

sudo service redis-server start 

or

sudo service redis start

Answer 4

redis.service file is missing in "/etc/systemd/system/" directory

sudo nano /etc/systemd/system/redis.service

then copy and paste these lines

[Unit]
Description=Redis In-Memory Data Store
After=network.target

[Service]
User=redis
Group=redis
ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf
ExecStop=/usr/local/bin/redis-cli shutdown
Restart=always

[Install]
WantedBy=multi-user.target

save and close this file

next modify the directory permisssions

$ sudo adduser --system --group --no-create-home redis
$ sudo chown redis:redis /var/lib/redis
$ sudo chmod 770 /var/lib/redis

next start the redis server

$ sudo systemctl start redis

check if its running now

$ sudo systemctl status redis

REFERENCE : https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-redis-on-ubuntu-16-04

Answer 5

I faced the same error. But for me the reason was totally different: It was due to a typo in my redis.conf file. Correcting that and doing sudo systemctl restart redis-server restarted redis instantly. It is misleading that same error is being thrown for this case also.

Answer 6

after making all conf try these commands

sudo systemctl daemon-reload

sudo chown redis:redis /var/lib/redis

sudo chmod 770 /var/lib/redis

And after

sudo systemctl start redis

Answer 7

Please check your redis.log. You should see something like this:

41393:M 07 Jun 17:02:19.034 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
41393:M 07 Jun 17:02:19.034 # Server can't set maximum open files to 10032 because of OS error: Operation not permitted.
41393:M 07 Jun 17:02:19.034 # Current maximum open files is 4096. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase 'ulimit -n'.
41393:M 07 Jun 17:02:19.034 # Can't open the append-only file: Read-only file system

Therefore check your system limits and maybe file permissions of your redis AOF (/var/lib/redis/*). For system limits, here is a good guide.

Answer 8

I needed both a /var/lib/redis folder and a redis user and group.

I used Kevin Upton's https://askubuntu.com/a/981641/451682 advice to find my issues: vim /etc/systemd/system/redis.service led me to /usr/local/bin/redis-server /etc/redis/redis.conf which responded with Can't chdir to '/var/lib/redis': No such file or directory which I created with sudo mkdir /var/lib/redis.

Then, though, I also needed to create the redis user and group and plop that on the /var/lib/redis dir, following Rishik Rohan's https://askubuntu.com/a/918408/451682 :

sudo adduser --system --group --no-create-home redis
sudo chown redis:redis /var/lib/redis
sudo chmod 770 /var/lib/redis

Thanks you two!

Answer 9

Steps to resolve that issue:- +==============+ A. Set memory limit in redis.conf in 566 number line

566 maxmemory 256mb 567 maxmemory-policy allkeys-lru

B. set the Linux kernel overcommit memory setting to 1:

$ sudo sysctl vm.overcommit_memory=1

or /etc/sysctl.conf and change it to 1.

C. Restart the redis server now.

$ systemctl restart redis

Please check now Redis status.

And if the still issue persists then Go and edit and redis service file.

========= vi /etc/systemd/system/redis.service

You will see like this:-

[Unit] Description=Redis In-Memory Data Store After=network.target

[Service] User=root Group=root ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf ExecStop=/usr/local/bin/redis-cli shutdown Restart=always

Type=Forking

[Install] WantedBy=multi-user.target

Change it ExecStart=/usr/local/bin/redis-server /etc/redis/redis.conf

to

ExecStart=/usr/local/bin/redis-server /etc/redis.conf

Now, Start the redis service

$ systemctl start redis

Now Redis will start without giving any error.

+==============+

Testing the redis:-

[root@server]# redis-cli 127.0.0.1:6379> ping Use the echo command to echo a given string: 127.0.0.1:6379> echo "Tecmint is testing Redis" You can also set a key value using the set command like this: 127.0.0.1:6379> set mykey "is testing Redis" Now view the value of mykey: 127.0.0.1:6379> get mykey "is testing Redis" 127.0.0.1:6379> exit [root@server]#

Now redis started successfully and running.

+==================+

Thanks & Regards

Answer 10

Although Even rebooting the system could not help, in my case it was because of a running background process which was found using :

ss -tulpn

killed it.

kill [process id/number]

Afterwards I could start redis service again.

service redis start

Answer 11

When updating from versions <6 to 6 and above, systemd support has been added in by default.

But your old config might have an old setting supervised = no inside.

That won't work with the Systemd Service Type notify.

Set the option supervised = systemd in your (/etc/redis/redis-conf) redis.conf and it should work.