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42 KiB
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K3s Features in k3d
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</a>
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</li>
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|
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<li class="md-nav__item">
|
|
<a href="../multiserver/" class="md-nav__link">
|
|
Creating multi-server clusters
|
|
</a>
|
|
</li>
|
|
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../registries/" class="md-nav__link">
|
|
Using Image Registries
|
|
</a>
|
|
</li>
|
|
|
|
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|
|
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|
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|
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<li class="md-nav__item">
|
|
<a href="../exposing_services/" class="md-nav__link">
|
|
Exposing Services
|
|
</a>
|
|
</li>
|
|
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|
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|
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<li class="md-nav__item">
|
|
<a href="../importing_images/" class="md-nav__link">
|
|
Importing modes
|
|
</a>
|
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</li>
|
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|
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|
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<li class="md-nav__item md-nav__item--active">
|
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<input class="md-nav__toggle md-toggle" data-md-toggle="toc" type="checkbox" id="__toc">
|
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|
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|
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|
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<label class="md-nav__link md-nav__link--active" for="__toc">
|
|
K3s Features in k3d
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
|
|
|
<a href="./" class="md-nav__link md-nav__link--active">
|
|
K3s Features in k3d
|
|
</a>
|
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|
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|
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
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|
|
<label class="md-nav__title" for="__toc">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Table of contents
|
|
</label>
|
|
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#general-k3s-documentation" class="md-nav__link">
|
|
General: K3s documentation
|
|
</a>
|
|
|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#coredns" class="md-nav__link">
|
|
CoreDNS
|
|
</a>
|
|
|
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</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#resources" class="md-nav__link">
|
|
Resources
|
|
</a>
|
|
|
|
<nav class="md-nav" aria-label="Resources">
|
|
<ul class="md-nav__list">
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#coredns-in-k3d" class="md-nav__link">
|
|
CoreDNS in k3d
|
|
</a>
|
|
|
|
<nav class="md-nav" aria-label="CoreDNS in k3d">
|
|
<ul class="md-nav__list">
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#modifications" class="md-nav__link">
|
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Modifications
|
|
</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</nav>
|
|
|
|
</li>
|
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|
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</ul>
|
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</nav>
|
|
|
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</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#local-path-provisioner" class="md-nav__link">
|
|
local-path-provisioner
|
|
</a>
|
|
|
|
<nav class="md-nav" aria-label="local-path-provisioner">
|
|
<ul class="md-nav__list">
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#resources_1" class="md-nav__link">
|
|
Resources
|
|
</a>
|
|
|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#local-path-provisioner-in-k3d" class="md-nav__link">
|
|
local-path-provisioner in k3d
|
|
</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</nav>
|
|
|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#traefik" class="md-nav__link">
|
|
Traefik
|
|
</a>
|
|
|
|
<nav class="md-nav" aria-label="Traefik">
|
|
<ul class="md-nav__list">
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#resources_2" class="md-nav__link">
|
|
Resources
|
|
</a>
|
|
|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#traefik-in-k3d" class="md-nav__link">
|
|
Traefik in k3d
|
|
</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</nav>
|
|
|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#servicelb-klipper-lb" class="md-nav__link">
|
|
servicelb (klipper-lb)
|
|
</a>
|
|
|
|
<nav class="md-nav" aria-label="servicelb (klipper-lb)">
|
|
<ul class="md-nav__list">
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#resources_3" class="md-nav__link">
|
|
Resources
|
|
</a>
|
|
|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#servicelb-in-k3d" class="md-nav__link">
|
|
servicelb in k3d
|
|
</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</nav>
|
|
|
|
</li>
|
|
|
|
</ul>
|
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|
|
</nav>
|
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</li>
|
|
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|
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<li class="md-nav__item md-nav__item--nested">
|
|
|
|
|
|
<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_2_8" data-md-state="indeterminate" type="checkbox" id="__nav_2_8" checked>
|
|
|
|
|
|
|
|
|
|
<label class="md-nav__link" for="__nav_2_8">
|
|
Advanced Guides
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
|
|
|
<nav class="md-nav" aria-label="Advanced Guides" data-md-level="2">
|
|
<label class="md-nav__title" for="__nav_2_8">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Advanced Guides
|
|
</label>
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../advanced/calico/" class="md-nav__link">
|
|
Use Calico instead of Flannel
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../advanced/cuda/" class="md-nav__link">
|
|
Running CUDA workloads
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../advanced/podman/" class="md-nav__link">
|
|
Using Podman instead of Docker
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
</ul>
|
|
</nav>
|
|
</li>
|
|
|
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|
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<li class="md-nav__item md-nav__item--nested">
|
|
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|
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<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_2_9" data-md-state="indeterminate" type="checkbox" id="__nav_2_9" checked>
|
|
|
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|
|
|
|
<label class="md-nav__link" for="__nav_2_9">
|
|
Commands
|
|
<span class="md-nav__icon md-icon"></span>
|
|
</label>
|
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|
|
<nav class="md-nav" aria-label="Commands" data-md-level="2">
|
|
<label class="md-nav__title" for="__nav_2_9">
|
|
<span class="md-nav__icon md-icon"></span>
|
|
Commands
|
|
</label>
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d/" class="md-nav__link">
|
|
K3d
|
|
</a>
|
|
</li>
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster/" class="md-nav__link">
|
|
K3d cluster
|
|
</a>
|
|
</li>
|
|
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster_create/" class="md-nav__link">
|
|
K3d cluster create
|
|
</a>
|
|
</li>
|
|
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|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster_delete/" class="md-nav__link">
|
|
K3d cluster delete
|
|
</a>
|
|
</li>
|
|
|
|
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|
|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster_edit/" class="md-nav__link">
|
|
K3d cluster edit
|
|
</a>
|
|
</li>
|
|
|
|
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|
|
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|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster_list/" class="md-nav__link">
|
|
K3d cluster list
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster_start/" class="md-nav__link">
|
|
K3d cluster start
|
|
</a>
|
|
</li>
|
|
|
|
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|
|
|
|
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|
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|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_cluster_stop/" class="md-nav__link">
|
|
K3d cluster stop
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_completion/" class="md-nav__link">
|
|
K3d completion
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_config/" class="md-nav__link">
|
|
K3d config
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
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|
|
|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_config_init/" class="md-nav__link">
|
|
K3d config init
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_config_migrate/" class="md-nav__link">
|
|
K3d config migrate
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_image/" class="md-nav__link">
|
|
K3d image
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_image_import/" class="md-nav__link">
|
|
K3d image import
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_kubeconfig/" class="md-nav__link">
|
|
K3d kubeconfig
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_kubeconfig_get/" class="md-nav__link">
|
|
K3d kubeconfig get
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_kubeconfig_merge/" class="md-nav__link">
|
|
K3d kubeconfig merge
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node/" class="md-nav__link">
|
|
K3d node
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node_create/" class="md-nav__link">
|
|
K3d node create
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node_delete/" class="md-nav__link">
|
|
K3d node delete
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node_edit/" class="md-nav__link">
|
|
K3d node edit
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node_list/" class="md-nav__link">
|
|
K3d node list
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node_start/" class="md-nav__link">
|
|
K3d node start
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
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|
|
|
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|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_node_stop/" class="md-nav__link">
|
|
K3d node stop
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_registry/" class="md-nav__link">
|
|
K3d registry
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_registry_create/" class="md-nav__link">
|
|
K3d registry create
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_registry_delete/" class="md-nav__link">
|
|
K3d registry delete
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_registry_list/" class="md-nav__link">
|
|
K3d registry list
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_version/" class="md-nav__link">
|
|
K3d version
|
|
</a>
|
|
</li>
|
|
|
|
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|
|
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|
|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../commands/k3d_version_list/" class="md-nav__link">
|
|
K3d version list
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
</ul>
|
|
</nav>
|
|
</li>
|
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|
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</ul>
|
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</nav>
|
|
</li>
|
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<h1 id="k3s-features-in-k3d">K3s Features in k3d<a class="headerlink" href="#k3s-features-in-k3d" title="Permanent link">¶</a></h1>
|
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<p>K3s ships with lots of built-in features and services, some of which may only be used in “non-normal” ways in k3d due to the fact that K3s is running in containers.</p>
|
|
<h2 id="general-k3s-documentation">General: K3s documentation<a class="headerlink" href="#general-k3s-documentation" title="Permanent link">¶</a></h2>
|
|
<ul>
|
|
<li>Automatically Deploying Manifests and Helm Charts: <a href="https://rancher.com/docs/k3s/latest/en/helm/#automatically-deploying-manifests-and-helm-charts">https://rancher.com/docs/k3s/latest/en/helm/#automatically-deploying-manifests-and-helm-charts</a><ul>
|
|
<li>Note: <code>/var/lib/rancher/k3s/server/manifests</code> is also the path inside the K3s container filesystem, where all built-in component manifests are, so you can override them or provide your own variants by mounting files there, e.g. <code>--volume /path/to/my/custom/coredns.yaml:/var/lib/rancher/k3s/server/manifests/coredns.yaml</code> will override the packaged CoreDNS component.</li>
|
|
</ul>
|
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</li>
|
|
<li>Customizing packaged Components with <code>HelmChartConfig</code>: <a href="https://rancher.com/docs/k3s/latest/en/helm/#customizing-packaged-components-with-helmchartconfig">https://rancher.com/docs/k3s/latest/en/helm/#customizing-packaged-components-with-helmchartconfig</a></li>
|
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</ul>
|
|
<h2 id="coredns">CoreDNS<a class="headerlink" href="#coredns" title="Permanent link">¶</a></h2>
|
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<blockquote>
|
|
<p>Cluster DNS service</p>
|
|
</blockquote>
|
|
<h2 id="resources">Resources<a class="headerlink" href="#resources" title="Permanent link">¶</a></h2>
|
|
<ul>
|
|
<li>Manifest embedded in K3s: <a href="https://github.com/k3s-io/k3s/blob/master/manifests/coredns.yaml">https://github.com/k3s-io/k3s/blob/master/manifests/coredns.yaml</a><ul>
|
|
<li>Note: it includes template variables (like <code>%{CLUSTER_DOMAIN}%</code>) that will be replaced by K3s before writing the file to the filesystem</li>
|
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</ul>
|
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</li>
|
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</ul>
|
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<h3 id="coredns-in-k3d">CoreDNS in k3d<a class="headerlink" href="#coredns-in-k3d" title="Permanent link">¶</a></h3>
|
|
<p>Basically, CoreDNS works the same in k3d as it does in other clusters.
|
|
One thing to note though is, that the default <code>forward . /etc/resolv.conf</code> configured in the <code>Corefile</code> doesn’t work the same, as the <code>/etc/resolv.conf</code> file inside the K3s node containers is not the same as the one on your local machine.</p>
|
|
<h4 id="modifications">Modifications<a class="headerlink" href="#modifications" title="Permanent link">¶</a></h4>
|
|
<p>As of k3d v5.x, k3d injects entries to the <code>NodeHosts</code> (basically a hosts file similar to <code>/etc/hosts</code> in Linux, which is managed by K3s) to enable Pods in the cluster to resolve the names of other containers in the same docker network (cluster network) and a special entry called <code>host.k3d.internal</code> which resolves to the IP of the network gateway (can be used to e.g. resolve DNS queries using your local resolver).
|
|
There’s a PR in progress to make customizations easier (for k3d and for users): <a href="https://github.com/k3s-io/k3s/pull/4397">https://github.com/k3s-io/k3s/pull/4397</a></p>
|
|
<h2 id="local-path-provisioner">local-path-provisioner<a class="headerlink" href="#local-path-provisioner" title="Permanent link">¶</a></h2>
|
|
<blockquote>
|
|
<p>Dynamically provisioning persistent local storage with Kubernetes</p>
|
|
</blockquote>
|
|
<h3 id="resources_1">Resources<a class="headerlink" href="#resources_1" title="Permanent link">¶</a></h3>
|
|
<ul>
|
|
<li>Source: <a href="https://github.com/rancher/local-path-provisioner">https://github.com/rancher/local-path-provisioner</a></li>
|
|
<li>Manifest embedded in K3s: <a href="https://github.com/k3s-io/k3s/blob/master/manifests/local-storage.yaml">https://github.com/k3s-io/k3s/blob/master/manifests/local-storage.yaml</a></li>
|
|
</ul>
|
|
<h3 id="local-path-provisioner-in-k3d">local-path-provisioner in k3d<a class="headerlink" href="#local-path-provisioner-in-k3d" title="Permanent link">¶</a></h3>
|
|
<p>In k3d, the local paths that the <code>local-path-provisioner</code> uses (default is <code>/var/lib/rancher/k3s/storage</code>) lies inside the container’s filesystem, meaning that by default it’s not mapped somewhere e.g. in your user home directory for you to use.
|
|
You’d need to map some local directory to that path to easily use the files inside this path: add <code>--volume $HOME/some/directory:/var/lib/rancher/k3s/storage@all</code> to your <code>k3d cluster create</code> command.</p>
|
|
<h2 id="traefik">Traefik<a class="headerlink" href="#traefik" title="Permanent link">¶</a></h2>
|
|
<blockquote>
|
|
<p>Kubernetes Ingress Controller</p>
|
|
</blockquote>
|
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<h3 id="resources_2">Resources<a class="headerlink" href="#resources_2" title="Permanent link">¶</a></h3>
|
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<ul>
|
|
<li>Official Documentation: <a href="https://doc.traefik.io/traefik/providers/kubernetes-ingress/">https://doc.traefik.io/traefik/providers/kubernetes-ingress/</a></li>
|
|
<li>Manifest embedded in K3s: <a href="https://github.com/k3s-io/k3s/blob/master/manifests/traefik.yaml">https://github.com/k3s-io/k3s/blob/master/manifests/traefik.yaml</a></li>
|
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</ul>
|
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<h3 id="traefik-in-k3d">Traefik in k3d<a class="headerlink" href="#traefik-in-k3d" title="Permanent link">¶</a></h3>
|
|
<p>k3d runs K3s in containers, so you’ll need to expose the http/https ports on your host to easily access Ingress resources in your cluster. We have a guide over here explaining how to do this: <a href="https://k3d.io/usage/guides/exposing_services/#1-via-ingress-recommended">https://k3d.io/usage/guides/exposing_services/#1-via-ingress-recommended</a></p>
|
|
<h2 id="servicelb-klipper-lb">servicelb (klipper-lb)<a class="headerlink" href="#servicelb-klipper-lb" title="Permanent link">¶</a></h2>
|
|
<blockquote>
|
|
<p>Embedded service load balancer in Klipper
|
|
Allows you to use services with <code>type: LoadBalancer</code> in K3s by creating tiny proxies that use <code>hostPort</code>s</p>
|
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</blockquote>
|
|
<h3 id="resources_3">Resources<a class="headerlink" href="#resources_3" title="Permanent link">¶</a></h3>
|
|
<ul>
|
|
<li>Source: <a href="https://github.com/k3s-io/klipper-lb">https://github.com/k3s-io/klipper-lb</a></li>
|
|
</ul>
|
|
<h3 id="servicelb-in-k3d">servicelb in k3d<a class="headerlink" href="#servicelb-in-k3d" title="Permanent link">¶</a></h3>
|
|
<p><code>klipper-lb</code> creates new pods that proxy traffic from <code>hostPort</code>s to the service ports of <code>type: LoadBalancer</code>.
|
|
The <code>hostPort</code> in this case is a port in a K3s container, not your local host, so you’d need to add the port-mapping via the <code>--port</code> flag when creating the cluster.</p>
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