Our goal with this series is to set up a Vespa application for personalized news recommendations. We will do this in stages, starting with a simple news search system and gradually adding functionality as we go through the tutorial parts.
The parts are:
There are different entry points to this tutorial. This one is for getting started using Docker on your local machine. Getting started on cloud.vespa.ai is coming soon. We will also have a version for pyvespa soon. For atomic model updates, see the Models hot swap tutorial.
In this part we will start with a minimal Vespa application to get used to some basic operations for running the application on Docker. In the next part of the tutorial, we’ll start developing our application.
In upcoming parts of this series, we will have some additional python dependencies - we use PyTorch to train vector representations for news and users and train machine learning models for use in ranking.
This tutorial uses Vespa-CLI, Vespa CLI is the official command-line client for Vespa.ai. It is a single binary without any runtime dependencies and is available for Linux, macOS and Windows.
$ brew install vespa-cli
This tutorial has a companion sample application
found under the
news directory. Throughout the tutorial we will be
using support code from this application. Also, the final state of
each tutorial can be found in the various
Let’s start by cloning the sample application:
$ vespa clone -f news news && cd news
The above download the
news directory from the Vespa
sample apps repository and
places the contents in a folder called
--help to see documentation
for the vespa-cli utility:
$ vespa clone --help
news diretory there are several pre-configuration applications packages.
app-1-getting-started directory contains a minimal Vespa application.
There are two files there:
services.xml- defines the services the application consists of
schemas/news.sd- defines the schema for searchable content.
We will get back to these files in the next part of the tutorial.
This application doesn’t contain much at the moment, but let’s start up the application anyway by starting a Docker container to run it:
$ docker pull vespaengine/vespa $ docker run -m 10G --detach --name vespa --hostname vespa-tutorial \ --publish 8080:8080 --publish 19071:19071 --publish 19092:19092 \ vespaengine/vespa
First, we pull the latest vespa-image
from the Docker hub, then we
start it with the name
vespa. This starts the Docker container and the
initial Vespa services to be able to deploy an application.
Starting the container can take a short while. Before continuing, make sure
that the configuration service is running by using
$ vespa status deploy --wait 300
With the config server up and running, deploy the application using vespa-cli:
$ vespa deploy --wait 300 app-1-getting-started
The command uploads the application and verifies the content. If anything is wrong with the application, this step will fail with a failure description, otherwise this switches the application to a live status.
Whenever you have a new version of your application, run the same command to deploy the application. In most cases, there is no need to restart services. Vespa takes care of reconfiguring the system. If a restart of services is required in some rare case, however, the output will notify which services needs restart to make the change effective.
In the upcoming parts of the tutorials, we’ll frequently deploy the application changes in this manner.
We must index data before we can search for it. This is called ‘feeding’, and we’ll get back to that in more detail in the next part of the tutorial. For now, to test that everything is up and running, we’ll feed in a single test document.
The first example uses the vespa-feed-client to index a document:
$ curl -L -o vespa-feed-client-cli.zip \ "https://search.maven.org/remotecontent?filepath=com/yahoo/vespa/vespa-feed-client-cli/7.527.20/vespa-feed-client-cli-7.527.20-zip.zip" $ unzip vespa-feed-client-cli.zip
We can also feed using Vespa document api directly, or using vespa cli which also uses the http document api.
This runs the
vespa-feed-client Java client with the file
$ ./vespa-feed-client-cli/vespa-feed-client \ --verbose --file doc.json --endpoint http://localhost:8080
This runs the
vespa cli with the file
doc.json file. The
-v option will make vespa-cli
print the http request:
$ vespa document -v doc.json
Once the feed operation is acked by Vespa, the operation is visible in search.
We can query the endpoint using the vespa-cli’s suppport for performing queries. The vespa cli
uses the Vespa query api to query vespa, including
in the command we can see the exact endpoint and url request parameters used.
$ vespa query -v 'yql=select * from news where true'
This example uses YQL (Vespa Query Language) to
search for all documents of type
news. This query request will return
1 result, which is the document we fed above.
$ vespa query 'yql=select * from news where userQuery()' 'query=hello world' 'default-index=title'
Another query language example that searches for hello AND world in the title.
$ vespa query 'yql=select * from news where title contains phrase("hello","world")'
Another query language example that searches for the phrase hello world in the title. In the next part of the tutorial we’ll demonstrate more query examples, and also ranking and grouping of results.
Run the following to remove the document from the index
$ vespa document -v remove id:news:news::1
Keep Vespa running to continue with next steps in this tutorial set (skip the below).
To stop Vespa, we can run the following commands:
$ docker exec vespa bash -c '/opt/vespa/bin/vespa-stop-services' $ docker exec vespa bash -c '/opt/vespa/bin/vespa-stop-configserver'
Likewise, to start the Vespa services:
$ docker exec vespa bash -c '/opt/vespa/bin/vespa-start-configserver' $ docker exec vespa bash -c '/opt/vespa/bin/vespa-start-services'
If a restart is required due to change in the application package, these two steps are what you need to do.
To wipe the index and restart:
$ docker exec vespa bash -c ' \ /opt/vespa/bin/vespa-stop-services && \ /opt/vespa/bin/vespa-remove-index -force && \ /opt/vespa/bin/vespa-start-services'
You can stop and kill the Vespa container application like this:
$ docker rm -f vespa
This will delete the Vespa application, including all data and configuration. See container tuning for production.
Our simple application should now be up and running. In the next part of the tutorial, we’ll start building from this foundation.