Ctr image import not working. These will work most of the time. If you open the created tar file and look at the manifest. tar The OS is Ubuntu 20. Mar 21, 2024 · What is the problem you're trying to solve I try to load a image like busybox. 22. Nov 21, 2021 · Hi, Rarely when importing a docker tar file to the microk8s using the command below It looks like the command finished successfully but the image was not imported, it happened twice on two different servers. May 19, 2021 · Let having a docker image like: So if you save the image with the below command, ctr cannot create an image. Here is how you can build an image using a traditional docker build command and then import it: Mar 16, 2026 · This document describes how to use the ctr command-line tool for image management operations in containerd. json", "RepoTags": null, "Layers": [] Oct 23, 2024 · It really sounds like you're running two different container runtimes, and k3s ctr and ctr are not the same thing. Dec 27, 2025 · Luckily, you can load existing images into containerd using ctr image import. g. To some extent, it can mitigate the absence of the build command. So what I usually do is: Pull the image from the docker hub on a work node with internet enabled. Oct 23, 2024 · How did you create the tarball? ctr image import expects docker save format tarballs, are you perhaps providing it with something else? Assuming its importing correctly, are you sure it's not getting pruned by the kubelet due to the disk being full? Oct 2, 2021 · There's no Internet connection so I manually downloaded needed images (e. This article details the ctr tool capabilities to manage images. json file, you will see something like below (RepoTags is null): "Config": "5b40ecbbea27ebdfbedabb732e228cb5649b0383ef6508257263978586cc8f9c. when rerun the same command the image is imported correctly microk8s ctr image import file. It covers pulling, pushing, importing, exporting, listing, tagging, and content management of container images. What do you get from ctr version vs k3s ctr version? Jan 25, 2020 · It appears, by the way, that using wildcards in the ctr image import command won’t work; I had to manually specify each individual file for import. tar. The images seem to be loaded successfully. Sep 4, 2024 · Hi community, I am asking this because most of my work nodes cannot pull images from the internet. Nov 6, 2023 · To use the ctr image convert command, you need to specify the source image and the target format. k8s. 1) and loaded them using "ctr image import". You can also specify additional options, such as the target image name and the target image platform. Pull the image from the work nodes that are without internet enabled. Verify that the image (s) are present and recognized by containerd using ctr image ls. 04 lts The command is perform from the tar directory or with a full path . io/kube-scheduler:v1. gcr. gz, but 'ctr: archive/tar: invalid tar header' appears ,but docker can load this format file. Dec 27, 2025 · Pulling, pushing, importing, and inspecting container images with ctr. Otherwise I must gzip Jul 6, 2021 · Description Importing images into containerd through ctr. exe can fail with the following error: Nov 6, 2023 · ctr is an interesting tool because in some cases it allows you to interact directly with containerd and not docker, meaning you can be compliant with other container runtimes (containerd, cri-o, podman, runc, lxd, nomad, kubernetes, swarm). ypvwi xedr ficaxc zfhhs gdrj