how to run elasticsearch and logstash with docker in CentOS7
Install docker
The installation command is as follows:
curl -fsSL https://get.docker.com | bash -s docker
After the installation is successful, enter the docker -v command
Docker version 20.10.6, build 370c289
Or you can directly enter docker, and if an error (-bash: docker: command not found) is reported, the installation is fail, otherwise the installation is successful
systemctl status docker
docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: inactive (dead)
Docs: https://docs.docker.com
Start docker¶
systemctl start docker
Configure docker image
Ubuntu 16.04+, Debian 8+, CentOS 7+
At present, the mainstream Linux distributions have used systemd for service management. Here is how to configure the mirror accelerator in the Linux distributions that use systemd.
Use Docker to pull the ElasticSearch image¶
docker pull elasticsearch:7.4.2
check image ID¶
docker images
Error:
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
1) 1st problem:
Edit /etc/sysctl.conf and append the following:
vm.max_map_count=655360
After saving, execute
sysctl -p
Restart es:
docker restart [imageID]
2) 2nd error
Delete the previously created container first:
docker rm -f [containerID]
Add -e "discovery.type=single-node"
docker run -d -e ES_JAVA_POTS="-Xms256m -Xmx256m" -e"discovery.type=single-node" -p 9200:9200 -p 9300:9300 --name elasticsearch ***es image ID***
Continue to check the running logs:
docker logs [imageID]
Verify that the run was successful¶
curl localhost:9200
{
"name" : "28765a4c9e04",
"cluster_name" : "docker-cluster",
"cluster_uuid" : "EUK5T7AmSAW-YvCwMU-W-w",
"version" : {
"number" : "7.4.2",
"build_flavor" : "default",
"build_type" : "docker",
"build_hash" : "2f90bbf7b93631e52bafb59b3b049cb44ec25e96",
"build_date" : "2019-10-28T20:40:44.881551Z",
"build_snapshot" : false,
"lucene_version" : "8.2.0",
"minimum_wire_compatibility_version" : "6.8.0",
"minimum_index_compatibility_version" : "6.0.0-beta1"
},
"tagline" : "You Know, for Search"
}
this means the running of elasticsearch is successful.
Install “elasticsearch head” plug-in monitoring management for visual management¶
Pull mirror¶
docker pull tobias74/elasticsearch-head
run
docker run -d -p 9100:9100 image ID
check with IP address: 9100, 9100 is the default port of elasticsearch.
a cross-domain access denied issue here:¶
Solution:
Enter the elasticsearch container and modify the configuration file elasticsearch.yml
docker ps -a # Get the id of running container "elasticsearch"
docker exec -it ******(container id) /bin/bash
cd ./config
Add in elasticsearch.yml:
http.cors.enabled: true
http.cors.allow-origin: "*"
Restart the elasticsearch container
docker restart [containerName]
Restart service
check logs are the same as above
docker logs [containerName]
when the running is successful, replace the IP address with localhost
Run successfully now
