Unable to get OpenSearch dashboard by running OpenSearch docker compose - docker

Question

I am a windows user. I installed Windows Subsystem for Linux [wsl2] and then installed docker using it. Then I tried to get started with OpenSearch so I followed the documentation in the given link
https://opensearch.org/downloads.html and run docker-compose up, In the shell, I am getting an error message like
opensearch-dashboards | {"type":"log","#timestamp":"2022-01-18T16:31:18Z","tags":["error","opensearch","data"],"pid":1,"message":"[ConnectionError]: getaddrinfo EAI_AGAIN opensearch-node1 opensearch-node1:9200"}
In the port http://localhost:5601/ I am getting messages like
OpenSearch Dashboards server is not ready yet
I also changed resources preference for memory to 5GB in docker-desktop but it still doesn't work. Can somebody help me with this?

Answer 1

After 5 days having issues with opensearch I've found something working fine for me:
Set docker memory to 4GB
And docker vm.max_map_count = 262144
Then I use previous versions of opensearch because the latest does not seems stable:
opensearchproject/opensearch:1.2.3
opensearchproject/opensearch-dashboards:1.1.0
opensearchproject/logstash-oss-with-opensearch-output-plugin:7.16.2
Here is my docker-compose.yml file:
version: '3'
services:
opensearch-node1A:
image: opensearchproject/opensearch:1.2.3
container_name: opensearch-node1A
environment:
- cluster.name=opensearch-cluster
- node.name=opensearch-node1A
- discovery.seed_hosts=opensearch-node1A,opensearch-node2A
- cluster.initial_master_nodes=opensearch-node1A,opensearch-node2A
- bootstrap.memory_lock=true # along with the memlock settings below, disables swapping
- "OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m" # minimum and maximum Java heap size, recommend setting both to 50% of system RAM
ulimits:
memlock:
soft: -1
hard: -1
nofile:
soft: 65536 # maximum number of open files for the OpenSearch user, set to at least 65536 on modern systems
hard: 65536
volumes:
- opensearch-data1:/usr/share/opensearch/data
ports:
- 9200:9200
- 9600:9600 # required for Performance Analyzer
networks:
- opensearch-net
opensearch-node2A:
image: opensearchproject/opensearch:1.2.3
container_name: opensearch-node2A
environment:
- cluster.name=opensearch-cluster
- node.name=opensearch-node2A
- discovery.seed_hosts=opensearch-node1A,opensearch-node2A
- cluster.initial_master_nodes=opensearch-node1A,opensearch-node2A
- bootstrap.memory_lock=true
- "OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m"
ulimits:
memlock:
soft: -1
hard: -1
nofile:
soft: 65536
hard: 65536
volumes:
- opensearch-data2:/usr/share/opensearch/data
networks:
- opensearch-net
opensearch-dashboardsA:
image: opensearchproject/opensearch-dashboards:1.1.0
container_name: opensearch-dashboardsA
ports:
- 5601:5601
expose:
- "5601"
environment:
OPENSEARCH_HOSTS: '["https://opensearch-node1A:9200","https://opensearch-node2A:9200"]'
networks:
- opensearch-net
logstash-with-plugin:
image: opensearchproject/logstash-oss-with-opensearch-output-plugin:7.16.2
container_name: logstash-with-plugin
networks:
- opensearch-net
volumes:
opensearch-data1:
opensearch-data2:
networks:
opensearch-net:

Answer 2

I had the same error message when opening "http://localhost:5601/" while testing opensearch and opensearch dasboard locally using Docker in Windows 10:
OpenSearch Dashboards server is not ready yet
opensearch-dashboards |
{"type":"log","#timestamp":"2022-02-10T12:29:35Z","tags":["error","opensearch","data"],"pid":1,"message":"[ConnectionError]:
getaddrinfo EAI_AGAIN opensearch-node1 opensearch-node1:9200"}
But when looking into the log I also found this other error:
opensearch-node1 | [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
The 3 part solution working for me was:
Part 1
On each opensearch nodes update the file:
/usr/share/opensearch/config/opensearch.yml
And add line:
plugins.security.disabled: true
Before the security plugins:
cks. "Single-node" mode disables them again.
#discovery.type: single-node
plugins.security.disabled: true
######## Start OpenSearch Security Demo Configuration ########
# WARNING: revise all the lines below before you go into production
plugins.security.ssl.transport.pemcert_filepath: esnode.pem
I found the information on opensearch official documentation
Part 2
Setting allocated memory for docker desktop to 4GB into .wslconfig more information here:
opendistrocommunity discussion
stackoverflow aloocate memory
Make sure your allocated memory is well set up (you have to restart docker desktop) with this command: docker info and check the line "Total Memory" it should be set to 4GB (approximately, in my case it has be set to 3.84GiB)
Part 3
And also increase vm.max_map_count:
open powershell
wsl -d docker-desktop
echo "vm.max_map_count = 262144" > /etc/sysctl.d/99-docker-desktop.conf
The info was founded here on github discussion

Answer 3

I had the same issue with my Opensearch-dashboards instance installed on VM without Docker usage. The problem was caused by wrong setting for connection to search engine in the opensearch-dashboards.yml file. I mixed up https and http protocols here (there was mismatch between settings of opensearch and opensearch-dashboards):
opensearch.hosts: [https://localhost:9200]