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96 lines
3.9 KiB
Markdown
96 lines
3.9 KiB
Markdown
# Cosmium
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Cosmium is a lightweight Cosmos DB emulator designed to facilitate local development and testing. While it aims to provide developers with a solution for running a local database during development, it's important to note that it's not 100% compatible with Cosmos DB. However, it serves as a convenient tool for E2E or integration tests during the CI/CD pipeline. Read more about compatibility [here](./docs/COMPATIBILITY.md).
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One of Cosmium's notable features is its ability to save and load state to a single JSON file. This feature makes it easy to load different test cases or share state with other developers, enhancing collaboration and efficiency in development workflows.
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# Getting Started
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### Installation via Homebrew
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You can install Cosmium using Homebrew by adding the `pikami/brew` tap and then installing the package.
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```sh
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brew tap pikami/brew
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brew install cosmium
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```
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This will download and install Cosmium on your system, making it easy to manage and update using Homebrew.
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### Downloading Cosmium Binaries
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You can download the latest version of Cosmium from the [GitHub Releases page](https://github.com/pikami/cosmium/releases). Choose the appropriate release for your operating system and architecture.
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### Supported Platforms
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Cosmium is available for the following platforms:
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- **Linux**: cosmium-linux-amd64
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- **macOS**: cosmium-darwin-amd64
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- **macOS on Apple Silicon**: cosmium-darwin-arm64
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- **Windows**: cosmium-windows-amd64.exe
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### Running Cosmium
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Once downloaded, you can launch Cosmium using the following command:
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```sh
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cosmium -Persist "./save.json"
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```
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Connection String Example:
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```
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AccountEndpoint=https://localhost:8081/;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==;
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```
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### Running Cosmos DB Explorer
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If you want to run Cosmos DB Explorer alongside Cosmium, you'll need to build it yourself and point the `-ExplorerDir` argument to the dist directory. Please refer to the [Cosmos DB Explorer repository](https://github.com/Azure/cosmos-explorer) for instructions on building the application.
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Once running, the explorer can be reached by navigating following URL: `https://127.0.0.1:8081/_explorer/` (might be different depending on your configuration).
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### Running with docker (optional)
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If you wan to run the application using docker, configure it using environment variables see example:
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```sh
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docker run --rm \
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-e COSMIUM_PERSIST=/save.json \
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-v ./save.json:/save.json \
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-p 8081:8081 \
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ghcr.io/pikami/cosmium
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```
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### SSL Certificate
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By default, Cosmium uses a pre-generated SSL certificate. You can provide your own certificates by specifying paths to the SSL certificate and key (PEM format) using the `-Cert` and `-CertKey` arguments, respectively.
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To disable SSL and run Cosmium on HTTP instead, you can use the `-DisableTls` flag. However most applications will require HTTPS.
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### Other Available Arguments
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- **-AccountKey**: Account key for authentication (default "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==")
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- **-DisableAuth**: Disable authentication
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- **-Host**: Hostname (default "localhost")
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- **-InitialData**: Path to JSON containing initial state
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- **-Persist**: Saves data to the given path on application exit (When `-InitialData` argument is not supplied, it will try to load data from path supplied in `-Persist`)
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- **-Port**: Listen port (default 8081)
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- **-Debug**: Runs application in debug mode, this provides additional logging
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These arguments allow you to configure various aspects of Cosmium's behavior according to your requirements.
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All mentioned arguments can also be set using environment variables:
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- **COSMIUM_ACCOUNTKEY** for `-AccountKey`
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- **COSMIUM_DISABLEAUTH** for `-DisableAuth`
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- **COSMIUM_HOST** for `-Host`
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- **COSMIUM_INITIALDATA** for `-InitialData`
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- **COSMIUM_PERSIST** for `-Persist`
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- **COSMIUM_PORT** for `-Port`
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- **COSMIUM_DEBUG** for `-Debug`
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# License
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This project is [MIT licensed](./LICENSE).
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