{"id":4806,"date":"2026-07-06T07:45:25","date_gmt":"2026-07-06T07:45:25","guid":{"rendered":"https:\/\/netguide.io\/linux\/?p=4806"},"modified":"2026-07-06T07:45:26","modified_gmt":"2026-07-06T07:45:26","slug":"k3s-upgrade-und-downgrade-so-wechselst-du-sicher-die-kubernetes-version","status":"publish","type":"post","link":"https:\/\/netguide.io\/linux\/de\/k3s-upgrade-und-downgrade-so-wechselst-du-sicher-die-kubernetes-version\/","title":{"rendered":"K3s Upgrade und Downgrade: So wechselst du sicher die Kubernetes-Version"},"content":{"rendered":"<script type=\"text\/plain\" data-tcf=\"waiting-for-consent\" data-id=\"4797\" data-bid=\"2\" data-placement=\"4798\">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<\/script>\n<p class=\"wp-block-paragraph\">Wer ein schlankes, stabiles und ressourcenschonendes Kubernetes in der Cloud oder im Home-Lab betreibt, landet schnell bei <strong>K3s<\/strong>. Die von Rancher entwickelte Distribution l\u00e4uft extrem performant auf virtuellen Servern (VPS). Ein genialer Pluspunkt von K3s: Das Verwalten von Updates ist erstaunlich unkompliziert.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Egal, ob du auf die neueste stabile Version wechseln oder gezielt auf eine \u00e4ltere Version zur\u00fcckrollen willst \u2013 mit nur einem Befehl ist die Arbeit meist erledigt. In dieser Anleitung zeigen wir dir, wie das Upgrade und Downgrade funktionieren und worauf du beim Thema Backup unbedingt achten solltest.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. K3s auf die neueste Stable-Version upgraden<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn du dein K3s-Cluster einfach auf den aktuellen, stabilen Stand bringen willst, musst du im Grunde nur das offizielle Installationsskript erneut ausf\u00fchren. K3s erkennt die bestehende Konfiguration und aktualisiert die Binaries im laufenden Betrieb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nutze daf\u00fcr einfach deinen urspr\u00fcnglichen Installationsbefehl. Wenn du beispielsweise Traefik und den integrierten ServiceLB deaktiviert hast (weil du einen eigenen Ingress-Controller wie Nginx nutzt), sieht der Befehl wie folgt aus:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#24292e\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#e1e4e8;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>curl -sfL https:\/\/get.k3s.io | INSTALL_K3S_EXEC=\"--disable traefik --disable servicelb\" K3S_KUBECONFIG_MODE=\"644\" sh -s -\n<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki github-dark\" style=\"background-color: #24292e\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #B392F0\">curl<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #79B8FF\">-sfL<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">https:\/\/get.k3s.io<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #F97583\">|<\/span><span style=\"color: #E1E4E8\"> INSTALL_K3S_EXEC<\/span><span style=\"color: #F97583\">=<\/span><span style=\"color: #9ECBFF\">&quot;--disable traefik --disable servicelb&quot;<\/span><span style=\"color: #E1E4E8\"> K3S_KUBECONFIG_MODE<\/span><span style=\"color: #F97583\">=<\/span><span style=\"color: #9ECBFF\">&quot;644&quot;<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #B392F0\">sh<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #79B8FF\">-s<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">-<\/span><\/span>\n<span class=\"line\"><\/span><\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Hinweis: Deine bestehenden Flags (wie <code>--disable<\/code>) und die Kubeconfig-Rechte bleiben dadurch exakt so gesetzt, wie du sie brauchst.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Gezieltes Upgrade oder Downgrade auf eine bestimmte Version<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Manchmal verlangt ein Projekt oder eine GitOps-Pipeline (z. B. mit ArgoCD) nach einer ganz bestimmten Kubernetes-Minor-Version. Wenn du gezielt auf eine Version wie <strong>v1.29.0<\/strong> wechseln m\u00f6chtest, kannst du die Umgebungsvariable <code>INSTALL_S3S_VERSION<\/code> mitschicken:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#24292e\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#e1e4e8;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>curl -sfL https:\/\/get.k3s.io | INSTALL_K3S_VERSION=\"v1.29.0+k3s1\" INSTALL_K3S_EXEC=\"--disable traefik --disable servicelb\" K3S_KUBECONFIG_MODE=\"644\" sh -s -\n<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki github-dark\" style=\"background-color: #24292e\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #B392F0\">curl<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #79B8FF\">-sfL<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">https:\/\/get.k3s.io<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #F97583\">|<\/span><span style=\"color: #E1E4E8\"> INSTALL_K3S_VERSION<\/span><span style=\"color: #F97583\">=<\/span><span style=\"color: #9ECBFF\">&quot;v1.29.0+k3s1&quot;<\/span><span style=\"color: #E1E4E8\"> INSTALL_K3S_EXEC<\/span><span style=\"color: #F97583\">=<\/span><span style=\"color: #9ECBFF\">&quot;--disable traefik --disable servicelb&quot;<\/span><span style=\"color: #E1E4E8\"> K3S_KUBECONFIG_MODE<\/span><span style=\"color: #F97583\">=<\/span><span style=\"color: #9ECBFF\">&quot;644&quot;<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #B392F0\">sh<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #79B8FF\">-s<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">-<\/span><\/span>\n<span class=\"line\"><\/span><\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Funktioniert das K3s-Downgrade wirklich so einfach?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ja!<\/strong> Falls du versehentlich auf eine zu neue Version (z. B. v1.30.x) gesprungen bist, kannst du denselben Befehl einfach mit der gew\u00fcnschten \u00e4lteren Versionsnummer (<code>v1.29.0+k3s1<\/code>) erneut ausf\u00fchren. K3s ersetzt die Bin\u00e4rdateien und startet die Control Plane neu.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Wichtig bei Downgrades:<\/strong> Auch wenn das Ersetzen der K3s-Binaries nahtlos funktioniert, solltest du immer pr\u00fcfen, ob deine im Cluster laufenden Workloads und deren Custom Resource Definitions (CRDs) mit der \u00e4lteren Kubernetes-API-Version kompatibel sind.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">3. Die Lebensversicherung: Backups vor dem Versionswechsel<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Auch wenn K3s-Updates in der Praxis extrem robust sind: <strong>Kein Versionswechsel ohne Backup.<\/strong> Wenn sich beim Upgrade die Datenbank-Schemata \u00e4ndern oder ein Downgrade fehlschl\u00e4gt, rettet dir ein Snapshot den Tag.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je nachdem, wie dein K3s-Setup aufgebaut ist, solltest du folgende Schritte durchf\u00fchren:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">VPS \/ VM-Snapshots<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn dein K3s auf einer virtuellen Maschine (z. B. unter <a href=\"https:\/\/netguide.io\/linux\/de\/category\/proxmox\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Proxmox Category\">Proxmox<\/a> oder bei einem Cloud-Anbieter) l\u00e4uft, ist ein <strong>vollst\u00e4ndiger VM-Snapshot<\/strong> der schnellste Weg zur\u00fcck. Schl\u00e4gt etwas fehl, setzt du die VM einfach im Ganzen zur\u00fcck.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Integriertes Etcd-Backup (falls genutzt)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Falls dein Cluster mit dem integrierten <code>etcd<\/code> als Datastore l\u00e4uft, bringt K3s automatisierte Snapshot-Funktionen mit. Du kannst vor dem Update manuell einen Snapshot triggern:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#24292e\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#e1e4e8;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>k3s etcd-snapshot save --name vor-upgrade-backup\n<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki github-dark\" style=\"background-color: #24292e\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #B392F0\">k3s<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">etcd-snapshot<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">save<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #79B8FF\">--name<\/span><span style=\"color: #E1E4E8\"> <\/span><span style=\"color: #9ECBFF\">vor-upgrade-backup<\/span><\/span>\n<span class=\"line\"><\/span><\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Die Snapshots liegen standardm\u00e4\u00dfig unter <code>\/var\/lib\/rancher\/k3s\/server\/db\/snapshots\/<\/code> und k\u00f6nnen im Ernstfall \u00fcber das Argument <code>--cluster-reset<\/code> beim Systemstart wieder eingespielt werden.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Externe SQLite \/ MariaDB sichern<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nutzt du K3s im Single-Node-Betrieb mit der Standard-SQLite-Datenbank oder extern \u00fcber eine MariaDB\/PostgreSQL (Kine)? Sichere die entsprechende Datenbank-Datei bzw. erstelle einen SQL-Dump, bevor du das Skript ausf\u00fchrst.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fazit<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K3s beweist, dass Kubernetes-Administration nicht kompliziert sein muss. Durch das flexible Installationsskript lassen sich Versionsspr\u00fcnge in Sekundenschnelle vollziehen \u2013 und selbst ein versehentliches Upgrade ist dank der unkomplizierten Downgrade-M\u00f6glichkeit kein Weltuntergang. Mit einem frischen Backup in der Hinterhand bist du f\u00fcr das n\u00e4chste Wartungsfenster perfekt vorbereitet.<\/p>\n<script type=\"text\/plain\" data-tcf=\"waiting-for-consent\" data-id=\"4799\" data-bid=\"2\" data-placement=\"4800\">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<\/script>","protected":false},"excerpt":{"rendered":"<p>Wer ein schlankes, stabiles und ressourcenschonendes Kubernetes in der Cloud oder im Home-Lab betreibt, landet schnell bei K3s. 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