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64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
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# Cluster Test
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This directory contains a program you can use to test a cluster.
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Here's how:
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First, install a cluster of Elasticsearch nodes. You can install them on
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different computers, or start several nodes on a single machine.
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Build cluster-test by `go build cluster-test.go` (or build with `make`).
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Run `./cluster-test -h` to get a list of flags:
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```sh
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$ ./cluster-test -h
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Usage of ./cluster-test:
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-errorlog="": error log file
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-healthcheck=true: enable or disable healthchecks
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-healthchecker=1m0s: healthcheck interval
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-index="twitter": name of ES index to use
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-infolog="": info log file
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-n=5: number of goroutines that run searches
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-nodes="": comma-separated list of ES URLs (e.g. 'http://192.168.2.10:9200,http://192.168.2.11:9200')
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-retries=0: number of retries
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-sniff=true: enable or disable sniffer
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-sniffer=15m0s: sniffer interval
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-tracelog="": trace log file
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```
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Example:
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```sh
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$ ./cluster-test -nodes=http://127.0.0.1:9200,http://127.0.0.1:9201,http://127.0.0.1:9202 -n=5 -index=twitter -retries=5 -sniff=true -sniffer=10s -healthcheck=true -healthchecker=5s -errorlog=error.log
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```
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The above example will create an index and start some search jobs on the
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cluster defined by http://127.0.0.1:9200, http://127.0.0.1:9201,
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and http://127.0.0.1:9202.
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* It will create an index called `twitter` on the cluster (`-index=twitter`)
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* It will run 5 search jobs in parallel (`-n=5`).
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* It will retry failed requests 5 times (`-retries=5`).
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* It will sniff the cluster periodically (`-sniff=true`).
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* It will sniff the cluster every 10 seconds (`-sniffer=10s`).
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* It will perform health checks periodically (`-healthcheck=true`).
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* It will perform health checks on the nodes every 5 seconds (`-healthchecker=5s`).
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* It will write an error log file (`-errorlog=error.log`).
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If you want to test Elastic with nodes going up and down, you can use a
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chaos monkey script like this and run it on the nodes of your cluster:
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```sh
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#!/bin/bash
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while true
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do
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echo "Starting ES node"
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elasticsearch -d -Xmx4g -Xms1g -Des.config=elasticsearch.yml -p es.pid
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sleep `jot -r 1 10 300` # wait for 10-300s
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echo "Stopping ES node"
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kill -TERM `cat es.pid`
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sleep `jot -r 1 10 60` # wait for 10-60s
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done
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```
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