No alive nodes found in your cluster - elasticsearch

Question

I installed elasticsearch with the help of this link .
require 'vendor/autoload.php';
use Elasticsearch\ClientBuilder;
$client = ClientBuilder::create()->setHosts(["localhost:9200"])->build();
$response = '';
try{
$params = [
'index' => 'my_index',
'type' => 'my_type',
'id' => 'my_id',
'body' => ['testField' => 'abc']
];
$response = $client->indices()->create($params);
}catch(Exception $e){
echo "Exception : ".$e->getMessage();
}
print_r($response);
die('End : Elastic Search');
It returns me No alive nodes found in your cluster.
When I change the port to 80
$client = ClientBuilder::create()->setHosts(["localhost:80"])->build();
it gave me below error.
Method Not Allowed. The requested method PUT is not allowed for the URL /my_index.

Answer 1

check if your network is watching the ip of elastic service, if you are using docker, before composing container, check inside your web app server over shell if you are watching the ip of service and adding the ip in the .env file and execute again the docker compose.
in another cases check if you vps o development environment is pinging o watching the ip of elastic service

Answer 2

Did you try to restart the elasticsearch daemon? Like:
systemctl restart elasticsearch
Then, check if it's running:
systemctl status elasticsearch
If not, check the log files for any exceptions.

Answer 3

If you use Elasticsearch server in docker as the doc, https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html
But it uses a different network (networks: - esnet) with other services and it cannot talk to the application network. After remove the networks setting and it works well.

Answer 4

You mixed between index and document creation, first you need to create the index (like table in regular relational database), and then insert now document
require 'vendor/autoload.php';
use Elasticsearch\ClientBuilder;
$indexParams = [
'index' => 'my_index',
'body' => [
'settings' => [
'number_of_shards' => 5,
'number_of_replicas' => 1
]
]
];
$docParams = [
'index' => 'my_index',
'type' => 'my_type',
'id' => 'my_id',
'body' => ['testField' => 'abc']
];
$client = ClientBuilder::create()->setHosts(["localhost:9200"])->build();
$response = '';
try {
/* Create the index */
$response = $client->indices()->create($indexParams);
print_r($response);
/* put doc in the index */
$response = $client->index($docParams);
print_r($response);
} catch(Exception $e) {
echo "Exception : ".$e->getMessage();
}
die('End : Elastic Search');

Answer 5

set breackpoint on vendor\guzzlehttp\ringphp\src\Client\CurlHandler.php on method CurlHandler::_invokeAsArray and see $response
also use
$client = ClientBuilder::create()->setHosts([['host' =>self::$CONF['elasticSearchHost'],'port' => '80','scheme'=>'http']])->build();