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Installing OpenSearch

uses Docker; which is why i installed Docker and wrote the Docker wiki yesterday
source
sudo swapoff -a
- disables memory-paging and swapping
sudo vi etc/sysctl.conf (leading / removed because mod_security is stupid)
- actually it's etc/sysctl.d/10-map-count.conf
- vm.max_map_count=262144
  - Set max map count to 262144
sudo sysctl -p
- reload kernel parameters

curl -O https://raw.githubusercontent.com/opensearch-project/documentation-website/2.19/assets/examples/docker-compose.yml
- download docker-compose for example (which is, apparently, the real thing?)
docker compose up -d
- start the docker-compose cluster as background process (-d = detached)