# Useful Elasticsearch Commands

Get the shards

```bash
curl -X GET "localhost:9200/_cat/shards"
```

Get the indices from Elasticsearch

```bash
curl -X GET "localhost:9200/_cat/indices"
```

Get version details of elasticsearch

```bash
curl -X GET "localhost:9200"
```

Delete an index

```bash
curl -X DELETE "localhost:9200/graylog_20"
```

Get current health

```bash
curl -X GET "localhost:9200/_cat/health"
```

Disable shard allocation

```bash
curl -X PUT "localhost:9200/_cluster/settings" \
    -H 'Content-Type: application/json' \
    -d '{ "persistent": { "cluster.routing.allocation.enable":"none" }}'
```

Stop indexing and perform a sync'd flush

```bash
curl -X POST "localhost:9200/_flush/synced"
```

Enable allocation

```bash
curl -X PUT "localhost:9200/_cluster/settings" \
    -H 'Content-Type: application/json' \
    -d '{"persistent": { "cluster.routing.allocation.enable": null}}'
```

```bash
curl -X PUT "localhost:9200/_all/_settings" \
    -H "Content-Type: application/json" \
    -d '{"index.blocks.read_only_allow_delete": false}'
```

Retry rerouting

```bash
curl -s -X POST 'http://localhost:9200/_cluster/reroute?retry_failed=true&pretty'
```