elk-stack

You Know, for Search

REference

Installing Elasticsearch

The standard Elasticsearch install comes with its own Java installation and an additional set of paid features which need a trial license.

You don’t want that for the cleanest installation. Find the latest release which:

is fully open source software (OSS)
comes without a Java runtime so you can install your own

And work out which versions of Java you can use to run Elasticsearch.

Running Elasticsearch in a Docker container

[Dockerfile]
starts from a Docker image which has OpenJDK 11 installed
downloads and expands the Elasticsearch 7.10 archive
sets up the environment with a Linux user and Java options
copies in the downloaded Elasticsearch directory & config files
tells Docker to run the /bin/elasticsearch binary on startup

docker-compose -f labs/for-search/compose.yml up -d

docker logs elkstack_elasticsearch_1

On Windows 10:

. ./labs/scripts/windows-tools.ps1

curl http://localhost:9200

What version are we running?

Indexing documents

Indexing is how you store data in Elasticsearch. There are client libraries for all the major languages, and you can use the REST API.

curl -H 'Content-Type: application/json' -XPOST 'http://localhost:9200/classes/_doc/elk-stack' --data-binary "@labs/for-search/data/elk-stack.json"

curl http://localhost:9200/classes/_doc/elk-stack

Add two more classes:

id: docker-fun, file path: labs/for-search/classes/docker-fun.json
id: k8s-fun, file path: labs/for-search/classes/k8s-fun.json

curl -H ‘Content-Type: application/json’ -XPOST ‘http://localhost:9200/classes/_doc/docker-fun’ –data-binary “@labs/for-search/data/docker-fun.json”

curl -H ‘Content-Type: application/json’ -XPOST ‘http://localhost:9200/classes/_doc/k8s-fun’ –data-binary “@labs/for-search/data/k8s-fun.json”

Check the details are stored:

curl http://localhost:9200/classes/_doc/docker-fun

curl http://localhost:9200/classes/_doc/k8s-fun

Basic searching

Querystring:

curl http://localhost:9200/classes/_search?q=fundamentals

curl http://localhost:9200/classes/_search?q=-fundamentals

curl -H ‘Content-Type: application/json’ http://localhost:9200/classes/_search?pretty=true –data-binary “@labs/for-search/queries/match-all.json”

curl -H ‘Content-Type: application/json’ http://localhost:9200/classes/_search?pretty=true –data-binary “@labs/for-search/queries/match-name.json”

curl -H ‘Content-Type: application/json’ http://localhost:9200/classes/_search?pretty=true –data-binary “@labs/for-search/queries/match-bool-name.json”

Lab

bulk load students
how many “Chiefs”?
who is the CTO of Globomantics?

Stuck? Try hints or check the solution.

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