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Privacy Policy</a></li></ul></nav></div></div></aside><main class="docMainContainer_namt"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_YAwJ"><div class="docItemContainer_Rv5Z"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_zCmv" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/tools/staticdocs/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_JFrk"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item"><a class="breadcrumbs__link" itemprop="item" href="/tools/staticdocs/docs/getting-started"><span itemprop="name">Getting Started</span></a><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Key Concepts</span><meta itemprop="position" content="2"></li></ul></nav><div class="tocCollapsible_O_Qc theme-doc-toc-mobile tocMobile_tjDr"><button type="button" class="clean-btn tocCollapsibleButton_htYj">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>OpenC3 COSMOS Key Concepts</h1></header>
 <h2 class="anchor anchorWithStickyNavbar_fF9Z" id="projects">Projects<a href="#projects" class="hash-link" aria-label="Direct link to Projects" title="Direct link to Projects">​</a></h2>
 <p>The main COSMOS <a href="https://github.com/OpenC3/cosmos" target="_blank" rel="noopener noreferrer">repo</a> contains all the source code used to build and run COSMOS. However, users (not developers) of COSMOS should use the COSMOS <a href="https://github.com/OpenC3/cosmos-project" target="_blank" rel="noopener noreferrer">project</a> to launch COSMOS. The project consists of the <a href="https://github.com/OpenC3/cosmos-project/blob/main/openc3.sh" target="_blank" rel="noopener noreferrer">openc3.sh</a> and <a href="https://github.com/OpenC3/cosmos-project/blob/main/openc3.bat" target="_blank" rel="noopener noreferrer">openc3.bat</a> files for starting and stopping COSMOS, the <a href="https://github.com/OpenC3/cosmos-project/blob/main/compose.yaml" target="_blank" rel="noopener noreferrer">compose.yaml</a> for configuring the COSMOS containers, and the <a href="https://github.com/OpenC3/cosmos-project/blob/main/.env" target="_blank" rel="noopener noreferrer">.env</a> file for setting runtime variables. Additionally, the COSMOS project contains user modifiable config files for both Redis and Traefik.</p>
@@ -15,11 +15,11 @@
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="images">Images<a href="#images" class="hash-link" aria-label="Direct link to Images" title="Direct link to Images">​</a></h3>
 <p>Per <a href="https://docs.docker.com/get-started/overview/#images" target="_blank" rel="noopener noreferrer">Docker</a>, &quot;An image is a read-only template with instructions for creating a Docker container.&quot; The base operating system COSMOS uses is called <a href="https://www.alpinelinux.org/" target="_blank" rel="noopener noreferrer">Alpine Linux</a>. It is a simple and compact image with a full package system that allows us to install our dependencies. Starting with Alpine, we create a <a href="https://docs.docker.com/engine/reference/builder/" target="_blank" rel="noopener noreferrer">Dockerfile</a> to add Ruby and Python and a few other packages to create our own docker image. We further build upon that image to create a NodeJS image to support our frontend and additional images to support our backend.</p>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="containers">Containers<a href="#containers" class="hash-link" aria-label="Direct link to Containers" title="Direct link to Containers">​</a></h3>
 <p>Per <a href="https://www.docker.com/resources/what-container/" target="_blank" rel="noopener noreferrer">Docker</a>, &quot;a container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another.&quot; Also per <a href="https://docs.docker.com/guides/walkthroughs/what-is-a-container/" target="_blank" rel="noopener noreferrer">Docker</a>, &quot;A container is an isolated environment for your code. This means that a container has no knowledge of your operating system, or your files. It runs on the environment provided to you by Docker Desktop. Containers have everything that your code needs in order to run, down to a base operating system.&quot; COSMOS utilizes containers to provide a consistent runtime environment. Containers make it easy to deploy to local on-prem servers, cloud environments, or air-gapped networks.</p>
 <p>The COSMOS Open Source containers consist of the following:</p>
-<table><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td>cosmos-openc3-cosmos-init-1</td><td>Copies files to Minio and configures COSMOS then exits</td></tr><tr><td>cosmos-openc3-operator-1</td><td>Main COSMOS container that runs the interfaces and target mircoservices</td></tr><tr><td>cosmos-openc3-cosmos-cmd-tlm-api-1</td><td>Rails server that provides all the COSMOS API endpoints</td></tr><tr><td>cosmos-openc3-cosmos-script-runner-api-1</td><td>Rails server that provides the Script API endpoints</td></tr><tr><td>cosmos-openc3-redis-1</td><td>Serves the static target configuration</td></tr><tr><td>cosmos-openc3-redis-ephemeral-1</td><td>Serves the <a href="https://redis.io/docs/data-types/streams" target="_blank" rel="noopener noreferrer">streams</a> containing the raw and decomutated data</td></tr><tr><td>cosmos-openc3-minio-1</td><td>Provides a S3 like bucket storage interface and also serves as a static webserver for the tool files</td></tr><tr><td>cosmos-openc3-traefik-1</td><td>Provides a reverse proxy and load balancer with routes to the COSMOS endpoints</td></tr></tbody></table>
+<table><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td>cosmos-openc3-cosmos-init-1</td><td>Copies files to Minio and configures COSMOS then exits</td></tr><tr><td>cosmos-openc3-operator-1</td><td>Main COSMOS container that runs the interfaces and target microservices</td></tr><tr><td>cosmos-openc3-cosmos-cmd-tlm-api-1</td><td>Rails server that provides all the COSMOS API endpoints</td></tr><tr><td>cosmos-openc3-cosmos-script-runner-api-1</td><td>Rails server that provides the Script API endpoints</td></tr><tr><td>cosmos-openc3-redis-1</td><td>Serves the static target configuration</td></tr><tr><td>cosmos-openc3-redis-ephemeral-1</td><td>Serves the <a href="https://redis.io/docs/data-types/streams" target="_blank" rel="noopener noreferrer">streams</a> containing the raw and decomutated data</td></tr><tr><td>cosmos-openc3-minio-1</td><td>Provides a S3 like bucket storage interface and also serves as a static webserver for the tool files</td></tr><tr><td>cosmos-openc3-traefik-1</td><td>Provides a reverse proxy and load balancer with routes to the COSMOS endpoints</td></tr></tbody></table>
 <p>The container list for <a href="https://openc3.com/enterprise" target="_blank" rel="noopener noreferrer">Enterprise COSMOS</a> consists of the following:</p>
 <table><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr><td>cosmos-enterprise-openc3-metrics-1</td><td>Rails server that provides metrics on COSMOS performance</td></tr><tr><td>cosmos-enterprise-openc3-keycloak-1</td><td>Single-Sign On service for authentication</td></tr><tr><td>cosmos-enterprise-openc3-postgresql-1</td><td>SQL Database for use by Keycloak</td></tr><tr><td>openc3-nfs *</td><td>Network File System pod only for use in Kubernetes to share code libraries between containers</td></tr></tbody></table>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="docker-compose">Docker Compose<a href="#docker-compose" class="hash-link" aria-label="Direct link to Docker Compose" title="Direct link to Docker Compose">​</a></h3>
 <p>Per <a href="https://docs.docker.com/compose/" target="_blank" rel="noopener noreferrer">Docker</a>, &quot;Compose is a tool for defining and running multi-container Docker applications. With Compose, you use a YAML file to configure your application&#x27;s services. Then, with a single command, you create and start all the services from your configuration.&quot; OpenC3 uses compose files to both build and run COSMOS. The <a href="https://github.com/OpenC3/cosmos-project/blob/main/compose.yaml" target="_blank" rel="noopener noreferrer">compose.yaml</a> is where ports are exposed and environment variables are used.</p>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="environment-file">Environment File<a href="#environment-file" class="hash-link" aria-label="Direct link to Environment File" title="Direct link to Environment File">​</a></h3>
@@ -27,12 +27,12 @@
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="kubernetes">Kubernetes<a href="#kubernetes" class="hash-link" aria-label="Direct link to Kubernetes" title="Direct link to Kubernetes">​</a></h3>
 <p>Per <a href="https://kubernetes.io/" target="_blank" rel="noopener noreferrer">Kubernetes.io</a>, &quot;Kubernetes, also known as K8s, is an open-source system for automating deployment, scaling, and management of containerized applications. It groups containers that make up an application into logical units for easy management and discovery.&quot; <a href="https://openc3.com/enterprise" target="_blank" rel="noopener noreferrer">COSMOS Enterprise</a> provides <a href="https://helm.sh/docs/topics/charts/" target="_blank" rel="noopener noreferrer">Helm charts</a> for easy deployment to Kubernetes in various cloud environments.</p>
 <p>COSMOS Enterprise also provides <a href="https://www.terraform.io/" target="_blank" rel="noopener noreferrer">Terraform</a> scripts to deploy COSMOS infrastructure on various cloud environments.</p>
 <h2 class="anchor anchorWithStickyNavbar_fF9Z" id="frontend">Frontend<a href="#frontend" class="hash-link" aria-label="Direct link to Frontend" title="Direct link to Frontend">​</a></h2>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="vuejs">Vue.js<a href="#vuejs" class="hash-link" aria-label="Direct link to Vue.js" title="Direct link to Vue.js">​</a></h3>
-<p>The COSMOS frontend is fully browser native and is implented in the Vue.js framework. Per <a href="https://vuejs.org/guide/introduction.html" target="_blank" rel="noopener noreferrer">Vue.js</a>, &quot;Vue is a JavaScript framework for building user interfaces. It builds on top of standard HTML, CSS, and JavaScript and provides a declarative and component-based programming model that helps you efficiently develop user interfaces, be they simple or complex.&quot; COSMOS utilizes Vue.js and the <a href="https://vuetifyjs.com/en/" target="_blank" rel="noopener noreferrer">Vuetify</a> Component Framework UI library to build all the COSMOS tools which run in the browser of your choice.</p>
+<p>The COSMOS frontend is fully browser native and is implemented in the Vue.js framework. Per <a href="https://vuejs.org/guide/introduction.html" target="_blank" rel="noopener noreferrer">Vue.js</a>, &quot;Vue is a JavaScript framework for building user interfaces. It builds on top of standard HTML, CSS, and JavaScript and provides a declarative and component-based programming model that helps you efficiently develop user interfaces, be they simple or complex.&quot; COSMOS utilizes Vue.js and the <a href="https://vuetifyjs.com/en/" target="_blank" rel="noopener noreferrer">Vuetify</a> Component Framework UI library to build all the COSMOS tools which run in the browser of your choice.</p>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="single-spa">Single-Spa<a href="#single-spa" class="hash-link" aria-label="Direct link to Single-Spa" title="Direct link to Single-Spa">​</a></h3>
-<p>While COSMOS itself is written in Vue.js, we utilize a technology called <a href="https://single-spa.js.org/" target="_blank" rel="noopener noreferrer">single-spa</a> to allow COSMOS developers to create applications in any javascript framework they choose. Single-spa is a micro frontend framework and acts as a top level router to render the application being requested. COSMOS provides sample applications ready to plug into single-spa in Angular, React, Svelt, and Vue.</p>
+<p>While COSMOS itself is written in Vue.js, we utilize a technology called <a href="https://single-spa.js.org/" target="_blank" rel="noopener noreferrer">single-spa</a> to allow COSMOS developers to create applications in any javascript framework they choose. Single-spa is a micro frontend framework and acts as a top level router to render the application being requested. COSMOS provides sample applications ready to plug into single-spa in Angular, React, Svelte, and Vue.</p>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="astro-ux">Astro UX<a href="#astro-ux" class="hash-link" aria-label="Direct link to Astro UX" title="Direct link to Astro UX">​</a></h3>
 <p>Per <a href="https://www.astrouxds.com/" target="_blank" rel="noopener noreferrer">AstroUXDS</a>, &quot;The Astro Space UX Design System enables developers and designers to build rich space app experiences with established interaction patterns and best practices.&quot; COSMOS utilizes the Astro design guidelines for color, typograpy, and iconograpy. In some cases, e.g. <a href="https://www.astrouxds.com/components/clock/" target="_blank" rel="noopener noreferrer">Astro Clock</a>, COSMOS directly incorporates Astro components.</p>
 <h2 class="anchor anchorWithStickyNavbar_fF9Z" id="backend">Backend<a href="#backend" class="hash-link" aria-label="Direct link to Backend" title="Direct link to Backend">​</a></h2>
 <h3 class="anchor anchorWithStickyNavbar_fF9Z" id="redis">Redis<a href="#redis" class="hash-link" aria-label="Direct link to Redis" title="Direct link to Redis">​</a></h3>
 <p><a href="https://redis.io/" target="_blank" rel="noopener noreferrer">Redis</a> is an in-memory data store with support for strings, hashes, lists, sets, sorted sets, streams, and more. COSMOS uses Redis to store both our configuration and data. If you look back at our <a href="/tools/staticdocs/docs/getting-started/key_concepts#containers">container list</a> you&#x27;ll notice two redis containers: cosmos-openc3-redis-1 and cosmos-openc3-redis-ephemeral-1. The ephemeral container contains all the real-time data pushed into <a href="https://redis.io/docs/data-types/streams/" target="_blank" rel="noopener noreferrer">Redis streams</a>. The other redis container contains COSMOS configuration that is meant to persist. <a href="https://openc3.com/enterprise" target="_blank" rel="noopener noreferrer">COSMOS Enterprise</a> provides helm charts that setup <a href="https://redis.io/docs/management/scaling/" target="_blank" rel="noopener noreferrer">Redis Cluster</a> to perform horizontal scaling where data is shared across multiple Redis nodes.</p>
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