ostop - OpenSearch Terminal UI

A terminal-based monitoring dashboard for OpenSearch clusters, focused on cluster operations and capacity planning.

📚 Documentation Website

Features

• 🏥 Cluster Health - Real-time cluster status monitoring
• 📊 Node Statistics - Detailed per-node metrics with JVM heap, CPU, RAM, and disk usage
• 📑 Index Overview - Monitor indices with health status, documents, and storage
• 🔍 Index Schema Viewer - Drill down into individual indices to explore field mappings, types, and analyzers
• 🔀 Shard Distribution - Visualize shard allocation across nodes with balance analysis
• 🎯 Resource Dashboard - Cluster-wide aggregate metrics and capacity planning insights
• 📈 Live Metrics - Real-time graphs showing indexing and search rates with auto-refresh
• 📊 Visual Metrics - Color-coded bar charts, health indicators, and Braille-rendered graphs
• 🎨 Split-Panel UI - Navigate between cluster overview, nodes, indices, shards, and resources
• 🔐 AWS Support - Native AWS OpenSearch support with SigV4 signing
• ⌨️ Keyboard Driven - Efficient terminal-based workflow with Vim-like navigation

Installation

Quick Install (Recommended)

Install the latest version with a single command:

Linux/macOS:

curl -sSL https://ostop.mkla.dev/install.sh | bash

This will automatically detect your OS and architecture, download the appropriate binary, and install it to /usr/local/bin.

To install to a custom location:

INSTALL_DIR=$HOME/.local/bin curl -sSL https://ostop.mkla.dev/install.sh | bash

Windows (PowerShell):

irm https://ostop.mkla.dev/install.ps1 | iex

This will install to %LOCALAPPDATA%\Programs\ostop and provide instructions to add it to your PATH.

To install to a custom location:

$env:OSTOP_INSTALL_DIR = "C:\custom\path"; irm https://ostop.mkla.dev/install.ps1 | iex

Download Pre-built Binaries

Alternatively, download the latest release for your platform from GitHub Releases:

# Example for Linux/macOS
# Download the appropriate binary for your platform
# Make it executable
chmod +x ostop

# Run it
./ostop --endpoint <your-endpoint>

Build from Source

If you have Go installed, you can build from source:

# Clone the repository
git clone https://github.com/Vegasq/ostop.git
cd ostop

# Build
go build -o ostop main.go

# Or run directly
go run main.go --endpoint <your-endpoint>

Usage

Local OpenSearch

# Start OpenSearch in Docker
docker run -d \
  --name opensearch-dev \
  -p 9200:9200 \
  -p 9600:9600 \
  -e "discovery.type=single-node" \
  -e "DISABLE_SECURITY_PLUGIN=true" \
  opensearchproject/opensearch:latest

# Connect with ostop
./ostop --endpoint http://localhost:9200

AWS OpenSearch

# Using default AWS credentials
./ostop \
  --endpoint https://search-mydomain-xxx.us-east-1.es.amazonaws.com \
  --region us-east-1

# Using specific AWS profile
./ostop \
  --endpoint https://search-mydomain-xxx.us-east-1.es.amazonaws.com \
  --region us-east-1 \
  --profile my-profile

Command Line Options

--endpoint <url>      OpenSearch endpoint URL (required)
--region <region>     AWS region (required for AWS OpenSearch)
--profile <name>      AWS profile name (optional)
--insecure            Skip TLS verification (development only)
--version             Show version information

Keyboard Shortcuts

Navigation

• ↑/k - Move up (menu navigation, index selection, or scroll up in right panel)
• ↓/j - Move down (menu navigation, index selection, or scroll down in right panel)
• Tab - Switch between left and right panels
• Enter - Select view (when in left panel) or drill into index schema (in indices view)
• Esc/Backspace - Return from index schema view to indices list

Scrolling (Right Panel)

• PgUp/b - Scroll up one page
• PgDn/f/Space - Scroll down one page
• Home/g - Jump to top
• End/G - Jump to bottom

Actions

• r - Refresh data from cluster (manual refresh for all views except Live Metrics)
• q - Quit application
• Ctrl+C - Force quit

Requirements

• Access to OpenSearch cluster (local or AWS)
• For AWS: Valid AWS credentials configured
• For building from source: Go 1.21 or later

AWS Authentication

ostop uses the standard AWS credential chain:

1. Environment variables (AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)
2. Shared credentials file (~/.aws/credentials)
3. IAM roles (EC2 instance profiles, ECS task roles)

This matches the behavior of awscurl and other AWS CLI tools.

Development

# Install dependencies
go mod download

# Run tests
go test ./...

# Build
go build -o ostop main.go

# Build with optimizations
go build -o ostop -ldflags="-s -w" main.go

License

MIT