OpenSearch on Ubuntu 24.04 LTS

OpenSearch 3.0.0 on Ubuntu 24.04 LTS for Azure Marketplace

OpenSearch is an Apache-2.0 licensed, community-driven search and analytics engine forked from Elasticsearch 7.10. Version 3.0.0 includes full-text search, log analytics, vector search, and an integrated OpenSearch Dashboards UI — all pre-installed on a hardened Ubuntu 24.04 LTS base, ready to index documents within minutes of first boot.

Why this image: A production-ready OpenSearch node on Azure requires more than extracting a tarball. You need Trusted Launch configuration, current Ubuntu CVE patches, JVM heap sizing, vm.max_map_count tuning, and systemd units for both the engine and Dashboards. This image handles all of that so your team has a queryable search cluster in under 15 minutes.

Who this is for: Engineering teams building application search, log analytics, or observability stacks who want the full OpenSearch feature set inside their own Azure subscription. DevOps teams replacing a self-managed Elasticsearch cluster. Data teams running vector similarity search or k-NN workloads alongside keyword search. Organizations in regulated industries that need full data residency with no third-party ingestion.

Target use cases:

• Application and e-commerce search — full-text, fuzzy, and faceted search with sub-100ms p99 query latency at moderate index sizes
• Log and event analytics — ingest application logs and audit trails via Logstash or Fluent Bit; query in OpenSearch Dashboards
• Security analytics — correlate and search security events across your Azure estate; pairs naturally with Wazuh agents forwarding to OpenSearch
• Vector and semantic search — k-NN plugin included for embedding-based retrieval, RAG pipelines, and recommendation engines
• Observability — trace analytics and live tail of structured log streams without a separate APM backend

What is pre-installed and configured:

• OpenSearch 3.0.0 — official upstream release from the OpenSearch APT repository, pinned to 3.0.0
• OpenSearch Dashboards 3.0.0 — integrated UI bound to localhost on port 5601; tunnel or proxy for remote access
• JVM heap pre-sized — set to 50% of available RAM; adjust jvm.options if you resize the VM
• vm.max_map_count=262144 — set in sysctl; missing this causes a startup abort on default Ubuntu images
• systemd units for both services — start on boot with dependency ordering so Dashboards waits for the engine
• Security plugin enabled — TLS on transport and HTTP layers; demo certificates pre-generated for first-boot connectivity
• 33 documented hardening traps applied — automated audit covering Trusted Launch, SSH hardening, walinuxagent provisioning, and cloud-init idempotency
• Trusted Launch + Secure Boot enabled by default — Gen2 image with vTPM and signed boot per Microsoft OEM requirements
• Azure Linux Agent pre-installed — custom-script extension and run-command work on first boot
• Monthly patch cadence — each release rolls forward Ubuntu CVE fixes and OpenSearch patch releases within days of publication

Recommended deployment: Standard_D4as_v5 (4 vCPU, 16 GB RAM) for development. Standard_E8as_v5 (8 vCPU, 64 GB RAM) for production. Attach a Premium SSD data disk for index storage so data survives VM reimaging.

Azure integration: Trusted Launch with Secure Boot and vTPM on by default. Azure Monitor Agent, Defender for Cloud, Azure Backup, and Update Manager install cleanly. Assign a Managed Identity so your app reads the admin password from Azure Key Vault without embedding secrets in code.

Licensing: OpenSearch and OpenSearch Dashboards are Apache-2.0 licensed open-source software. No per-node license required. Only standard Azure compute and storage rates apply.

Support: Email support@dcassociatesgroup.com for deployment assistance. Community support via the OpenSearch forums and GitHub.