Remove CentOS support from machine controller

Makefile

@@ -33,7 +33,7 @@ IMAGE_TAG = \
 		$(shell echo $$(git rev-parse HEAD && if [[ -n $$(git status --porcelain) ]]; then echo '-dirty'; fi)|tr -d ' ')
 IMAGE_NAME ?= $(REGISTRY)/$(REGISTRY_NAMESPACE)/machine-controller:$(IMAGE_TAG)
 
-OS = amzn2 centos ubuntu rhel flatcar rockylinux
+OS = amzn2 ubuntu rhel flatcar rockylinux
 
 BASE64_ENC = \
 		$(shell if base64 -w0 <(echo "") &> /dev/null; then echo "base64 -w0"; else echo "base64 -b0"; fi)

README.md

@@ -34,7 +34,7 @@
 ### What Works
 
 - Creation of worker nodes on AWS, Digitalocean, Openstack, Azure, Google Cloud Platform, Nutanix, VMWare Cloud Director, VMWare vSphere, Hetzner Cloud and Kubevirt
-- Using Ubuntu, Flatcar, CentOS 7 or Rocky Linux 8 distributions ([not all distributions work on all providers](/docs/operating-system.md))
+- Using Ubuntu, Flatcar, or Rocky Linux 8 distributions ([not all distributions work on all providers](/docs/operating-system.md))
 
 ### Supported Kubernetes Versions
 

docs/howto-provider.md

@@ -65,7 +65,7 @@ Provider implementations are located in individual packages in `k8c.io/machine-c
 When retrieving the individual configuration from the provider specification a type for unmarshalling is needed. Here first the provider configuration is read and based on it the individual values of the configuration are retrieved. Typically the access data (token, ID/key combination, document with all information) alternatively can be passed via an environment variable. According
 methods of the used `providerconfig.ConfigVarResolver` do support this.
 
-For creation of new machines the support of the possible information has to be checked. The machine controller supports _CentOS_, _Flatcar_ and _Ubuntu_. In case one or more aren't supported by the cloud infrastructure the error `providerconfig.ErrOSNotSupported` has to be returned.
+For creation of new machines the support of the possible information has to be checked. The machine controller supports _Flatcar_ and _Ubuntu_. In case one or more aren't supported by the cloud infrastructure the error `providerconfig.ErrOSNotSupported` has to be returned.
 
 ## Integrate provider into the Machine Controller
 

docs/openstack-images.md

@@ -10,5 +10,5 @@ There is a script to upload all supported image to OpenStack.
 By default all images will be named `machine-controller-${OS_NAME}`.
 The image names can be overwritten using environment variables:
 ```bash
-UBUNTU_IMAGE_NAME="ubuntu" CENTOS_IMAGE_NAME="centos" ./hack/setup-openstack-images.sh
+UBUNTU_IMAGE_NAME="ubuntu" ./hack/setup-openstack-images.sh
 ```

docs/operating-system.md

@@ -4,27 +4,26 @@
 
 ### Cloud provider
 
-|   | Ubuntu | CentOS | Flatcar | RHEL | Amazon Linux 2 | Rocky Linux |
-|---|---|---|---|---|---|---|
-| AWS | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
-| Azure | ✓ | ✓ | ✓ | ✓ | x | ✓ |
-| Digitalocean  | ✓ | ✓ | x | x | x | ✓ |
-| Equinix Metal | ✓ | ✓ | ✓ | x | x | ✓ |
-| Google Cloud Platform | ✓ | x | ✓ | x | x | x |
-| Hetzner | ✓ | x | x | x | x | ✓ |
-| KubeVirt | ✓ | ✓ | ✓ | ✓ | x | ✓ |
-| Nutanix | ✓ | ✓ | x | x | x | x |
-| Openstack | ✓ | ✓ | ✓ | ✓ | x | ✓ |
-| VMware Cloud Director | ✓ | x | x | x | x | x |
-| VSphere | ✓ | ✓ | ✓ | ✓ | x | ✓ |
+|   | Ubuntu | Flatcar | RHEL | Amazon Linux 2 | Rocky Linux |
+|---|---|---|---|---|---|
+| AWS | ✓ | ✓ | ✓ | ✓ | ✓ |
+| Azure | ✓ | ✓ | ✓ | x | ✓ |
+| Digitalocean  | ✓ | x | x | x | ✓ |
+| Equinix Metal | ✓ | ✓ | x | x | ✓ |
+| Google Cloud Platform | ✓ | ✓ | x | x | x |
+| Hetzner | ✓ | x | x | x | ✓ |
+| KubeVirt | ✓ | ✓ | ✓ | x | ✓ |
+| Nutanix | ✓ | x | x | x | x |
+| Openstack | ✓ | ✓ | ✓ | x | ✓ |
+| VMware Cloud Director | ✓ | x | x | x | x |
+| VSphere | ✓ | ✓ | ✓ | x | ✓ |
 
 ## Configuring a operating system
 
 The operating system to use can be set via `machine.spec.providerConfig.operatingSystem`.
 Allowed values:
 
 - `amzn2`
-- `centos`
 - `flatcar`
 - `rhel`
 - `rockylinux`
@@ -40,7 +39,6 @@ Machine controller may work with other OS versions that are not listed in the ta
 |   | Versions |
 |---|---|
 | AmazonLinux2 | 2.x |
-| CentOS | 7.4.x, 7.6.x, 7.7.x |
 | RHEL | 8.x |
 | Rocky Linux | 8.5 |
 | Ubuntu | 20.04 LTS, 22.04 LTS |

docs/vsphere.md

@@ -154,7 +154,7 @@ Procedure:
 
     ```
     # The URL below is just an example
-    image_url="https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2"
+    image_url="https://cloud-images.ubuntu.com/releases/20.04/release/ubuntu-20.04-server-cloudimg-amd64.img"
     image_name="$(basename -- "${image_url}" | sed 's/.qcow2$//g')"
     curl -sL "${image_url}" -O .
     ```
@@ -203,12 +203,6 @@ Red Hat Enterprise Linux 8.x KVM Guest Image can be found at [Red Hat Customer P
 
 Follow [qcow2](#create-template-vm-from-qcow2) template VM creation guide.
 
-#### CentOS
-
-CentOS 7 image can be found at the following link: <https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2r>.
-
-Follow [qcow2](#create-template-vm-from-qcow2) template VM creation guide.
-
 ## Provider configuration
 
 VSphere provider accepts the following configuration parameters:

examples/digitalocean-machinedeployment.yaml

@@ -52,7 +52,6 @@ spec:
             monitoring: false
             tags:
               - "machine-controller"
-          # Can be 'ubuntu' or 'centos'
           operatingSystem: "ubuntu"
           operatingSystemSpec:
             disableAutoUpdate: true

examples/kubevirt-machinedeployment.yaml

@@ -56,7 +56,7 @@ spec:
               - maxSkew: "1"
                 topologyKey: "kubernetes.io/hostname"
                 whenUnsatisfiable: "" # Allowed values: "DoNotSchedule", "ScheduleAnyway"
-          # Can also be `centos`, must align with he configured registryImage above
+          # Must align with the configured registryImage above
           operatingSystem: "ubuntu"
           operatingSystemSpec:
             distUpgradeOnBoot: false

examples/openstack-machinedeployment.yaml

@@ -153,7 +153,6 @@ spec:
             # the list of metadata you would like to attach to the instance
             tags:
               tagKey: tagValue
-          # Can be 'ubuntu' or 'centos'
           operatingSystem: "ubuntu"
           operatingSystemSpec:
             distUpgradeOnBoot: true

examples/operating-system-manager.yaml

@@ -233,7 +233,6 @@ spec:
                   enum:
                     - flatcar
                     - rhel
-                    - centos
                     - ubuntu
                     - amzn2
                     - rockylinux
@@ -683,7 +682,6 @@ spec:
                   enum:
                     - flatcar
                     - rhel
-                    - centos
                     - ubuntu
                     - amzn2
                     - rockylinux

examples/scaleway-machinedeployment.yaml

@@ -56,7 +56,6 @@ spec:
             ipv6: false
             tags:
               - "machine-controller"
-          # Can be 'ubuntu' or 'centos'
           operatingSystem: "ubuntu"
           operatingSystemSpec:
             disableAutoUpdate: true

hack/build-kubevirt-images.sh

@@ -20,7 +20,7 @@ BUILD_NUM=2
 
 cd $(dirname $0)/kubevirt_dockerfiles
 
-for flavor in ubuntu centos; do
+for flavor in ubuntu; do
   docker build \
     -t quay.io/kubermatic/machine-controller-kubevirt:$flavor-$BUILD_NUM \
     -f dockerfile.$flavor .

hack/e2e-setup-openstack-images.sh

@@ -20,6 +20,5 @@ set -o pipefail
 cd $(dirname $0)/
 
 export UBUNTU_IMAGE_NAME="machine-controller-e2e-ubuntu"
-export CENTOS_IMAGE_NAME="machine-controller-e2e-centos"
 
 ./setup-openstack-images.sh

hack/setup-openstack-images.sh

@@ -18,7 +18,6 @@ set -o nounset
 set -o pipefail
 
 UBUNTU_IMAGE_NAME=${UBUNTU_IMAGE_NAME:-"machine-controller-ubuntu"}
-CENTOS_IMAGE_NAME=${CENTOS_IMAGE_NAME:-"machine-controller-centos"}
 
 echo "Downloading Ubuntu 18.04 image from upstream..."
 curl -L -o ubuntu.img http://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img
@@ -30,14 +29,3 @@ openstack image create \
   ${UBUNTU_IMAGE_NAME}
 rm ubuntu.img
 echo "Successfully uploaded ${UBUNTU_IMAGE_NAME} to OpenStack..."
-
-echo "Downloading CentOS 7 image from upstream..."
-curl -L -o centos.qcow2 http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2
-echo "Uploading CentOS 7 image to OpenStack..."
-openstack image create \
-  --disk-format qcow2 \
-  --container-format bare \
-  --file centos.qcow2 \
-  ${CENTOS_IMAGE_NAME}
-rm centos.qcow2
-echo "Successfully uploaded ${CENTOS_IMAGE_NAME} to OpenStack..."

image-builder/README.md

@@ -4,19 +4,17 @@
 
  Currently supported operating systems:
   * RedHat CoreOS
-  * CentOS 7
   * Debian 9
 
 ### Usage
 
-`./build.sh --target-os centos7|debian9 [--release K8S-RELEASE]`
+`./build.sh --target-os debian9 [--release K8S-RELEASE]`
 
 Parameters:
  * `--target-os` is mandatory and specifies the Linux distribution image to be built. Possible values:
-   * `centos7`
    * `debian9`
  * `--release` specifies the Kubernetes release to be added to the image, e.g. `v1.10.2`. If not provided, the script will look up the latest stable release and use that.
 
 ### Output
 
-The script will generate a VMDK disk image with the filename `TARGET_OS-output.vmdk`, e.g. `centos7-output.vmdk`.
+The script will generate a VMDK disk image with the filename `TARGET_OS-output.vmdk`.

image-builder/build.sh

@@ -23,7 +23,7 @@ TARGET_OS=""
 
 usage() {
 	echo -e "usage:"
-	echo -e "\t$0 --target-os centos7|debian9|ubuntu-xenial|ubuntu-bionic [--release K8S-RELEASE]"
+	echo -e "\t$0 --target-os debian9|ubuntu-xenial|ubuntu-bionic [--release K8S-RELEASE]"
 }
 
 while [ $# -gt 0 ]; do
@@ -34,7 +34,7 @@ while [ $# -gt 0 ]; do
 		;;
 	--target-os)
 		if [[ -z $2 ]]; then
-			echo "You must specify target OS. Currently 'centos7' is supported."
+			echo "You must specify target OS."
 			exit 1
 		fi
 		TARGET_OS="$2"
@@ -80,29 +80,6 @@ mkdir -p "$TARGETFS" "$SCRIPT_DIR/downloads"
 # on failure unmount target filesystem (if mounted) and delete the temporary directory
 trap "sudo mountpoint --quiet $TARGETFS && sudo umount --recursive $TARGETFS; rm -rf $TEMPDIR" EXIT SIGINT
 
-get_centos7_image() {
-	CENTOS7_BUILD="1802"
-	echo " * Downloading vanilla CentOS image."
-	wget "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-$CENTOS7_BUILD.qcow2.xz" -P "$TEMPDIR"
-
-	echo " * Verifying GPG signature"
-	wget --quiet "https://cloud.centos.org/centos/7/images/sha256sum.txt.asc" -O "$TEMPDIR/centos7-sha256sum.txt.asc"
-	gpg2 --quiet --import "$SCRIPT_DIR/RPM-GPG-KEY-CentOS-7"
-	gpg2 "$TEMPDIR/centos7-sha256sum.txt.asc"
-
-	echo " * Verifying SHA256 digest"
-	EXPECTED_SHA256="$(grep "CentOS-7-x86_64-GenericCloud-$CENTOS7_BUILD.qcow2.xz$" <"$TEMPDIR/centos7-sha256sum.txt" | cut -f1 -d ' ')"
-	CALCULATED_SHA256="$(sha256sum "$TEMPDIR/CentOS-7-x86_64-GenericCloud-$CENTOS7_BUILD.qcow2.xz" | cut -f1 -d ' ')"
-	if [[ $CALCULATED_SHA256 != "$EXPECTED_SHA256" ]]; then
-		echo " * SHA256 digest verification failed. '$CALCULATED_SHA256' != '$EXPECTED_SHA256'"
-		exit 1
-	fi
-
-	echo " * Decompressing"
-	unxz --keep "$TEMPDIR/CentOS-7-x86_64-GenericCloud-$CENTOS7_BUILD.qcow2.xz"
-	mv "$TEMPDIR/CentOS-7-x86_64-GenericCloud-$CENTOS7_BUILD.qcow2" "$SCRIPT_DIR/downloads/CentOS-7-x86_64-GenericCloud.qcow2"
-}
-
 get_debian9_image() {
 	DEBIAN_CD_SIGNING_KEY_FINGERPRINT="DF9B9C49EAA9298432589D76DA87E80D6294BE9B"
 
@@ -167,7 +144,7 @@ mount_rootfs() {
 	local IMAGE="$1"
 	local FOLDER="$2"
 	case $TARGET_OS in
-	debian9 | centos7 | ubuntu-*)
+	debian9 | ubuntu-*)
 		echo "  * /"
 		sudo guestmount -a "$IMAGE" -m "/dev/sda1" "$TARGETFS"
 		;;
@@ -180,12 +157,6 @@ mount_rootfs() {
 }
 
 case $TARGET_OS in
-centos7)
-	CLEAN_IMAGE="$SCRIPT_DIR/downloads/CentOS-7-x86_64-GenericCloud.qcow2"
-	if [[ ! -f $CLEAN_IMAGE ]]; then
-		get_centos7_image
-	fi
-	;;
 debian9)
 	CLEAN_IMAGE="$SCRIPT_DIR/downloads/debian-9-openstack-amd64.qcow2"
 	if [[ ! -f $CLEAN_IMAGE ]]; then

pkg/apis/cluster/v1alpha1/conversions/testdata/machinesv1alpha1machine/openstack.yaml

@@ -65,7 +65,6 @@ spec:
       # the list of tags you would like to attach to the instance
       tags:
         tagKey: tagValue
-    # Can be 'ubuntu' or 'centos'
     operatingSystem: "ubuntu"
     operatingSystemSpec:
       distUpgradeOnBoot: true

pkg/cloudprovider/provider/alibaba/provider.go

@@ -44,7 +44,6 @@ import (
 
 const (
 	machineUIDTag   = "machine_uid"
-	centosImageName = "CentOS  7.9 64 bit"
 	ubuntuImageName = "Ubuntu  22.04 64 bit"
 
 	finalizerInstance = "kubermatic.io/cleanup-alibaba-instance"
@@ -456,8 +455,6 @@ func (p *provider) getImageIDForOS(machineSpec clusterv1alpha1.MachineSpec, os p
 		switch image.OSNameEn {
 		case ubuntuImageName:
 			availableImage[providerconfigtypes.OperatingSystemUbuntu] = image.ImageId
-		case centosImageName:
-			availableImage[providerconfigtypes.OperatingSystemCentOS] = image.ImageId
 		}
 	}
 

pkg/cloudprovider/provider/aws/provider.go

@@ -105,19 +105,6 @@ var (
 	}
 
 	amiFilters = map[providerconfigtypes.OperatingSystem]map[awstypes.CPUArchitecture]amiFilter{
-		// Source: https://wiki.centos.org/Cloud/AWS
-		providerconfigtypes.OperatingSystemCentOS: {
-			awstypes.CPUArchitectureX86_64: {
-				description: "CentOS Linux 7* x86_64*",
-				// The AWS marketplace ID from CentOS Community Platform Engineering (CPE)
-				owner: "125523088429",
-			},
-			awstypes.CPUArchitectureARM64: {
-				description: "CentOS Linux 7* aarch64*",
-				// The AWS marketplace ID from CentOS Community Platform Engineering (CPE)
-				owner: "125523088429",
-			},
-		},
 		providerconfigtypes.OperatingSystemRockyLinux: {
 			awstypes.CPUArchitectureX86_64: {
 				description: "*Rocky-8-EC2-*.x86_64",
@@ -337,8 +324,6 @@ func getDefaultRootDevicePath(os providerconfigtypes.OperatingSystem) (string, e
 	switch os {
 	case providerconfigtypes.OperatingSystemUbuntu:
 		return rootDevicePathSDA, nil
-	case providerconfigtypes.OperatingSystemCentOS:
-		return rootDevicePathSDA, nil
 	case providerconfigtypes.OperatingSystemRockyLinux:
 		return rootDevicePathSDA, nil
 	case providerconfigtypes.OperatingSystemRHEL:

pkg/cloudprovider/provider/azure/provider.go

@@ -141,12 +141,6 @@ func (vm *azureVM) Status() instance.Status {
 }
 
 var imageReferences = map[providerconfigtypes.OperatingSystem]compute.ImageReference{
-	providerconfigtypes.OperatingSystemCentOS: {
-		Publisher: to.StringPtr("OpenLogic"),
-		Offer:     to.StringPtr("CentOS"),
-		Sku:       to.StringPtr("7_9"), // https://docs.microsoft.com/en-us/azure/virtual-machines/linux/using-cloud-init
-		Version:   to.StringPtr("latest"),
-	},
 	providerconfigtypes.OperatingSystemUbuntu: {
 		Publisher: to.StringPtr("Canonical"),
 		Offer:     to.StringPtr("ubuntu-24_04-lts"),

pkg/cloudprovider/provider/digitalocean/provider.go

@@ -86,8 +86,6 @@ func getSlugForOS(os providerconfigtypes.OperatingSystem) (string, error) {
 	switch os {
 	case providerconfigtypes.OperatingSystemUbuntu:
 		return "ubuntu-24-04-x64", nil
-	case providerconfigtypes.OperatingSystemCentOS:
-		return "centos-7-x64", nil
 	case providerconfigtypes.OperatingSystemRockyLinux:
 		return "rockylinux-8-x64", nil
 	}

pkg/cloudprovider/provider/equinixmetal/provider.go

@@ -525,8 +525,6 @@ func getNameForOS(os providerconfigtypes.OperatingSystem) (string, error) {
 	switch os {
 	case providerconfigtypes.OperatingSystemUbuntu:
 		return "ubuntu_24_04", nil
-	case providerconfigtypes.OperatingSystemCentOS:
-		return "centos_7", nil
 	case providerconfigtypes.OperatingSystemFlatcar:
 		return "flatcar_stable", nil
 	case providerconfigtypes.OperatingSystemRockyLinux:

pkg/cloudprovider/provider/hetzner/provider.go

@@ -73,8 +73,6 @@ func getNameForOS(os providerconfigtypes.OperatingSystem) (string, error) {
 	switch os {
 	case providerconfigtypes.OperatingSystemUbuntu:
 		return "ubuntu-24.04", nil
-	case providerconfigtypes.OperatingSystemCentOS:
-		return "centos-7", nil
 	case providerconfigtypes.OperatingSystemRockyLinux:
 		return "rocky-8", nil
 	}

pkg/cloudprovider/provider/kubevirt/types/types.go

@@ -26,7 +26,6 @@ import (
 )
 
 var SupportedOS = map[providerconfigtypes.OperatingSystem]*struct{}{
-	providerconfigtypes.OperatingSystemCentOS:     nil,
 	providerconfigtypes.OperatingSystemUbuntu:     nil,
 	providerconfigtypes.OperatingSystemRHEL:       nil,
 	providerconfigtypes.OperatingSystemFlatcar:    nil,