# Rahti ### Rahti fundamentals

# What is Rahti?
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- Platform as a Service (PaaS)
                          - General-purpose HTTP(S) applications
                        - Based on OpenShift OKD
                          - Extends the functionality of Kubernetes
                        - In production since 2024 (open beta earlier)
                        - Data located in Kajaani, Finland
                        - Publicly accessible over the internet

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                        # XaaS
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                            <img src="/img/sld-rahti-image22.png" alt="Responsibility layers for IaaS, PaaS and SaaS.">
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                        # PaaS example providers
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- CSC Allas, Noppe, Rahti, Pukki, SD Connect
                        - Heroku
                        - Google App Engine
                        - Microsoft Azure App Service
                        - AWS Elastic Beanstalk
                        - Red Hat OpenShift ⬅️ Rahti
                        - Oracle Cloud Platform
                        - IBM Cloud Foundry
                        - Salesforce Platform (Force.com)

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                            <img src="/img/sld-rahti-image24.png" alt="PaaS provider logos.">
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                        # SaaS example providers
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- CSC Chipster, My CSC, Puhti/Mahti OOD
                        - Microsoft Office 365
                        - Google Workspace
                        - Salesforce (CRM)
                        - Dropbox
                        - Slack
                        - Zoom
                        - Adobe Creative Cloud

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                            <img src="/img/sld-rahti-image26.png" alt="SaaS provider logos.">
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                        # Benefits of Rahti (1/2)
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- No administrative burden of hardware, OS, etc.
                        - Security — isolated container execution
                        - QoS — provided by the platform
                        - Health monitoring — resource consumption, liveness and readiness probes
                        - Scaling — up or down in response to load (faster than VMs)
                        - Failover — software is restarted on any failure

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                        # Benefits of Rahti (2/2)
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- Rolling updates — new version deployed with no downtime
                        - Load balancing — automatic across resources
                        - DNS — no support request needed*
                        - Certificates — always valid, automatically renewed*
                        - Source-to-Image (S2I) — build and deploy from source code
                        - Helm charts — internal template catalogue

*for the URL pattern `something.2.rahtiapp.fi`

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                        # Accessing Rahti
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- A My CSC project with the Rahti service activated
                        - Web user interface: <https://rahti.csc.fi>
                        - Programmatic interfaces: Kubernetes libraries, the OpenShift library, the REST API
                          - CLI tool: `oc`

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                            <img src="/img/sld-rahti-image31.png" alt="The Rahti web user interface.">
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                        # Web UI: Developer view
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- The default opening view
                        - Create projects
                        - Launch applications from templates
                        - Deploy from images

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                            <img src="/img/sld-rahti-image33.png" alt="The Rahti web UI developer view.">
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                        # Web UI: Administrator view
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- Administrative tasks

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                            <img src="/img/sld-rahti-image35.png" alt="The Rahti web UI administrator view.">
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Thank you

Joona Tolonen

servicedesk@csc.fi