Elastic Stack 8 : Install Elasticsearch2024/09/25 |
Install Full-Text search engine [Elasticsearch]. |
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[1] | |
[2] | Install and Run Elasticsearch. |
root@dlp:~ #
pkg install -y elasticsearch8 curl
root@dlp:~ #
sysctl security.bsd.unprivileged_mlock=1 root@dlp:~ # echo 'security.bsd.unprivileged_mlock=1' >> /etc/sysctl.conf
root@dlp:~ #
service elasticsearch enable elasticsearch enabled in /etc/rc.conf root@dlp:~ # service elasticsearch start Starting elasticsearch. # reset admin user password root@dlp:~ # elasticsearch-reset-password --auto --username elastic This tool will reset the password of the [elastic] user to an autogenerated value. The password will be printed in the console. Please confirm that you would like to continue [y/N]y Password for the [elastic] user successfully reset. New value: VC3wulb8T4euiA+DxIbO # verify status # password is the one that is shown above root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt https://127.0.0.1:9200 Enter host password for user 'elastic': { "name" : "dlp.srv.world", "cluster_name" : "elasticsearch", "cluster_uuid" : "Tkls9_WiRm-XricowHjEVA", "version" : { "number" : "8.11.3", "build_flavor" : "default", "build_type" : "tar", "build_hash" : "64cf052f3b56b1fd4449f5454cb88aca7e739d9a", "build_date" : "2023-12-08T11:33:53.634979452Z", "build_snapshot" : false, "lucene_version" : "9.8.0", "minimum_wire_compatibility_version" : "7.17.0", "minimum_index_compatibility_version" : "7.0.0" }, "tagline" : "You Know, for Search" } |
[3] |
If you use Elasticsearch from other Hosts, refer to the setting for Clustering. |
[4] | This is the basic usage of Elasticsearch. Create an Index first, it is like Database on RDB. |
# show Index list ([pretty] means it shows JSON with human readable) root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt https://127.0.0.1:9200/_aliases?pretty Enter host password for user 'elastic': { ".security-7" : { "aliases" : { ".security" : { "is_hidden" : true } } } } # create Index root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt -X PUT "https://127.0.0.1:9200/test_index" Enter host password for user 'elastic': {"acknowledged":true,"shards_acknowledged":true,"index":"test_index"} # verify root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt https://127.0.0.1:9200/_aliases?pretty Enter host password for user 'elastic': { ".security-7" : { "aliases" : { ".security" : { "is_hidden" : true } } }, "test_index" : { "aliases" : { } } }root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt https://127.0.0.1:9200/test_index/_settings?pretty Enter host password for user 'elastic': { "test_index" : { "settings" : { "index" : { "routing" : { "allocation" : { "include" : { "_tier_preference" : "data_content" } } }, "number_of_shards" : "1", "provided_name" : "test_index", "creation_date" : "1726619545200", "number_of_replicas" : "1", "uuid" : "MDldtWojT7ScXGXUzVmiIg", "version" : { "created" : "8500003" } } } } } |
[5] | Define Mapping and insert test data. Mapping defines structure of Index. If inserting data, Mapping will be defined automatically, but it's possible to define manually, of course. |
# insert data root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt \
-H "Content-Type: application/json" \ -X PUT "https://127.0.0.1:9200/test_index/_doc/001" -d '{ "subject" : "Test Post No.1", "description" : "This is the initial post", "content" : "This is the test message for using Elasticsearch." }' {"_index":"test_index","_id":"001","_version":1,"result":"created","_shards":{"total":2,"successful":1,"failed":0},"_seq_no":0,"_primary_term":1} # show Mapping root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt "https://127.0.0.1:9200/test_index/_mapping/?pretty" Enter host password for user 'elastic': { "test_index" : { "mappings" : { "properties" : { "content" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } }, "description" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } }, "subject" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } } } } } } # show data root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt "https://127.0.0.1:9200/test_index/_doc/001?pretty" Enter host password for user 'elastic': { "_index" : "test_index", "_id" : "001", "_version" : 1, "_seq_no" : 0, "_primary_term" : 1, "found" : true, "_source" : { "subject" : "Test Post No.1", "description" : "This is the initial post", "content" : "This is the test message for using Elasticsearch." } } # search data # example of Search conditions below means [description] field includes a word [initial] root@dlp:~ # curl -u elastic --cacert /usr/local/etc/elasticsearch/certs/http_ca.crt "https://127.0.0.1:9200/test_index/_search?q=description:initial&pretty=true" Enter host password for user 'elastic': { "took" : 61, "timed_out" : false, "_shards" : { "total" : 1, "successful" : 1, "skipped" : 0, "failed" : 0 }, "hits" : { "total" : { "value" : 1, "relation" : "eq" }, "max_score" : 0.2876821, "hits" : [ { "_index" : "test_index", "_id" : "001", "_score" : 0.2876821, "_source" : { "subject" : "Test Post No.1", "description" : "This is the initial post", "content" : "This is the test message for using Elasticsearch." } } ] } } |
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