mirror of
https://github.com/clearlinux/clear-linux-documentation.git
synced 2026-08-23 07:45:54 +00:00
Kristal Dale
52b294d2af
* Update TM&B in tutorials section of docs - Add disclaimers for Intel trademarks - Update some 3rd party trademark attributions Signed-off-by: Kristal Dale <kristal.dale@intel.com> * Correct broken link in kubernetes.rst Signed-off-by: Kristal Dale <kristal.dale@intel.com> * - minor edit: escape asterisk(*) per feedback. Signed-off-by: Kristal Dale <kristal.dale@intel.com>
224 lines
4.7 KiB
ReStructuredText
224 lines
4.7 KiB
ReStructuredText
.. _redis:
|
|
|
|
Redis\*
|
|
#######
|
|
|
|
In this tutorial, you'll install :abbr:`Redis (REmote DIctionary Server)`
|
|
and launch a `Redis-server` on |CL-ATTR|. We invite you to pull our
|
|
`Clear Linux Redis instance`_ on Docker Hub\* for application or
|
|
infrastructure development.
|
|
|
|
.. contents::
|
|
:local:
|
|
:depth: 1
|
|
|
|
Description
|
|
***********
|
|
|
|
Redis is an in-memory key:value store designed for quick lookups, accessible
|
|
over a network. While the `redis data structure store`_ can serve
|
|
as a NoSQL database for a web application, it's also easy to integrate into an
|
|
existing stack. For example, you could use the Redis caching layer for
|
|
real-time responses on a leaderboard in a gaming app. Redis offers many client
|
|
libraries with language-specific bindings for Python\*, Perl\*, Ruby, and more.
|
|
|
|
Install the Redis bundle
|
|
************************
|
|
|
|
#. Log in as a user with administrative privilege.
|
|
|
|
#. Open a terminal.
|
|
|
|
#. Update your |CL| to the latest version.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo swupd update
|
|
|
|
#. Install the `redis-native` bundle.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo swupd bundle-add redis-native
|
|
|
|
Start the Redis-server
|
|
**********************
|
|
|
|
A :command:`systemd` service unit is available to control the Redis-server.
|
|
By default, Redis runs on port 6379.
|
|
|
|
#. Start the service and set it to start automatically on boot.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo systemctl enable --now redis
|
|
|
|
#. Confirm the service is running.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo systemctl status redis
|
|
|
|
#. Verify that the Redis-server sends a reply.
|
|
|
|
.. code-block:: bash
|
|
|
|
redis-cli ping
|
|
|
|
Expected output:
|
|
|
|
.. code-block:: console
|
|
|
|
PONG
|
|
|
|
.. note::
|
|
|
|
If you wish to customize settings for Redis, copy the
|
|
default :file:`/usr/share/defaults/etc/redis.conf` file into the
|
|
/etc/ directory, make changes as needed, and restart the service.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo cp -v /usr/share/defaults/etc/redis.conf /etc/
|
|
|
|
The Redis-server is now ready to use on |CL|. Try some of the examples shown
|
|
below.
|
|
|
|
Example 1: Use the redis-cli and commands
|
|
*****************************************
|
|
|
|
One advantage of Redis over other NoSQL databases is that developers can
|
|
easily access data structures like lists, sets, sorted sets, strings, and
|
|
hashes using collection operations commands similar to those found in many
|
|
programming languages. These exercises are inspired by `try redis io`_.
|
|
|
|
After your Redis-server is running, try some basic commands.
|
|
|
|
#. Start `redis-cli`. It provides syntax suggestions as you type.
|
|
|
|
.. code-block:: bash
|
|
|
|
redis-cli
|
|
|
|
#. :command:`SET` a key to hold a string value. In the set, create connections
|
|
and increment.
|
|
|
|
.. code-block:: none
|
|
|
|
SET server:name "clearlinux"
|
|
|
|
.. code-block:: none
|
|
|
|
MGET server:name
|
|
|
|
.. note::
|
|
|
|
If the key does not exist or hold a key value, `nil` is returned.
|
|
|
|
.. code-block:: none
|
|
|
|
SET connections 100
|
|
|
|
.. code-block:: none
|
|
|
|
INCR connections
|
|
|
|
.. code-block:: none
|
|
|
|
INCR connections
|
|
|
|
.. code-block:: none
|
|
|
|
DEL connections
|
|
|
|
#. Create a `friends` list and insert new values at the end of the list.
|
|
|
|
.. code-block:: none
|
|
|
|
RPUSH friends "Deb"
|
|
|
|
.. code-block:: none
|
|
|
|
RPUSH friends "David"
|
|
|
|
.. code-block:: none
|
|
|
|
RPUSH friends "Mary"
|
|
|
|
#. Modify the `friends` list, using a common slice method with a 0-index.
|
|
|
|
.. code-block:: none
|
|
|
|
LRANGE friends 0 1
|
|
|
|
.. code-block:: none
|
|
|
|
LLEN friends
|
|
|
|
.. code-block:: none
|
|
|
|
LPOP friends
|
|
|
|
.. code-block:: none
|
|
|
|
RPOP friends
|
|
|
|
.. code-block:: none
|
|
|
|
LLEN friends
|
|
|
|
#. Consider using a hash, which maps string fields and string values, and
|
|
offers multiple lookup methods.
|
|
|
|
Enter many user key:values with `HMSET`. Then try `HGET` and `HGETALL`.
|
|
|
|
.. code-block:: none
|
|
|
|
HMSET user:1000 name "Robert Noyce" password "SuperEngi9eer" email "robert.noyce@intel.com"
|
|
|
|
.. code-block:: none
|
|
|
|
HGET user:1000 name
|
|
|
|
.. code-block:: none
|
|
|
|
HGET user:1000 email
|
|
|
|
.. code-block:: none
|
|
|
|
HGETALL user:1000
|
|
|
|
|
|
Example 2: Run the |CL| Redis Docker\* image
|
|
********************************************
|
|
|
|
We also provide a `Clear Linux Redis instance`_, which is
|
|
updated continuously and maintained by |CL| development.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo swupd bundle-add containers-basic
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo systemctl start docker
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo -E docker pull clearlinux/redis
|
|
|
|
Next Steps
|
|
**********
|
|
|
|
* Follow the `redis quickstart tutorial`_ to expand potential uses.
|
|
|
|
* Learn how to use :ref:`docker`.
|
|
|
|
.. _try redis io: http://try.redis.io/
|
|
|
|
.. _Clear Linux Redis instance: https://hub.docker.com/r/clearlinux/redis
|
|
|
|
.. _redis data structure store: https://redis.io/
|
|
|
|
.. _redis quickstart tutorial: https://redis.io/topics/quickstart
|