├── .gitignore ├── LICENSE ├── README.md ├── commoninit.ign ├── download-image.py ├── kubic-kvm.tf ├── mk-ssh-config.sh ├── ssh_id_shared ├── terraform.tfvars.sample └── variables.tf /.gitignore: -------------------------------------------------------------------------------- 1 | *~ 2 | .swp 3 | .terraform/ 4 | kubic.qcow2 5 | terraform.log 6 | terraform.tfstate 7 | terraform.tfstate.backup 8 | terraform.tfvars 9 | ssh_config 10 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # terraform-kubic-kvm 2 | 3 | The goal is to provide a simple setup of three [Kubic](https://kubic.opensuse.org/) VMs. 4 | 5 | # About terraform-libvirt 6 | 7 | If you want to dive in the Terraform-libvirt API, you can have a look here: 8 | 9 | https://github.com/dmacvicar/terraform-provider-libvirt#website-docs 10 | 11 | ## Prerequisites 12 | 13 | You're going to need at least: 14 | 15 | * `terraform` >= 1.12 16 | * [`terraform-provider-libvirt`](https://github.com/dmacvicar/terraform-provider-libvirt) 17 | 18 | 19 | # Usage 20 | 21 | Run 22 | 23 | ```bash 24 | ./download-image.py 25 | terraform init 26 | terraform plan 27 | terraform apply 28 | ./mk-ssh-config.sh 29 | ``` 30 | 31 | to start the VMs. 32 | 33 | Some parameters (like number of virtual machines and parameters of virtual 34 | machines) are configurable by creating a `terraform.tfvars` file which can be 35 | copied from the sample file: 36 | 37 | ``` 38 | cp terraform.tfvars.sample terraform.tfvars 39 | ``` 40 | 41 | Please refer to the `variables.tf` file for the full variables list with 42 | descriptions. 43 | 44 | *note: the default password for the root user is `linux`.* 45 | 46 | # Setting up Kubernetes cluster 47 | 48 | Initialize the K8s cluster by running `kubeadm` on the the first node: 49 | 50 | ```bash 51 | cat <<'EOF' | ssh -F ssh_config $(terraform output -json | jq -r '.ips.value[0][]') 'bash -s' 52 | kubeadm init --cri-socket=/var/run/crio/crio.sock --pod-network-cidr=10.244.0.0/16 53 | mkdir -p $HOME/.kube 54 | sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config 55 | sudo chown $(id -u):$(id -g) $HOME/.kube/config 56 | kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml 57 | EOF 58 | ``` 59 | 60 | And run the `kubeadm join` on the others. We just have to add `--cri-socket=/var/run/crio/crio.sock`: 61 | 62 | ```bash 63 | join_command=$(ssh -F ssh_config $(terraform output -json | jq -r '.ips.value[0][]') "kubeadm token create --print-join-command") 64 | join_command="kubeadm join --cri-socket=/var/run/crio/crio.sock $(echo $join_command | python -c 'import sys; print(" ".join(sys.stdin.read().split()[2:]))')" 65 | ssh -F ssh_config $(terraform output -json | jq -r '.ips.value[1][]') "$join_command" 66 | ssh -F ssh_config $(terraform output -json | jq -r '.ips.value[2][]') "$join_command" 67 | ``` 68 | 69 | # Howto 70 | 71 | ## Access the cluster locally 72 | 73 | ```bash 74 | scp -F ssh_config $(terraform output -json | jq -r '.ips.value[0][]'):~/.kube/config ~/.kube/config 75 | k get nodes 76 | ``` 77 | 78 | ## Using an insecure private registry 79 | 80 | ```bash 81 | registry_ip="$(terraform output -json | jq -r '.ips.value[0][]'):5000" # or another IO 82 | for h in $(terraform output -json | jq -r '.ips.value[][]') 83 | do 84 | cat < str: 12 | with urlopen(url) as f: 13 | return f.read().decode('utf-8') 14 | 15 | def local_sha256(filename) -> str: 16 | sha256 = hashlib.sha256() 17 | with open(filename, 'rb') as f: 18 | reduce(lambda _, c: sha256.update(c), iter(lambda: f.read(sha256.block_size * 128), b''), None) 19 | return sha256.hexdigest() 20 | 21 | def remote_sha256(url): 22 | data = download_file(url + '.sha256') 23 | return [l for l in data.splitlines() if '.qcow2' in l][0].split()[0] 24 | 25 | def download_image(url: str, dst): 26 | last_percent_reported = 0 27 | 28 | def reporthook(count, blockSize, totalSize): 29 | nonlocal last_percent_reported 30 | percent = int(count * blockSize * 100 / totalSize) 31 | progress = int(count * blockSize * 50 / totalSize) 32 | 33 | if last_percent_reported == percent: 34 | return 35 | 36 | sys.stdout.write("\r[%s%s] %d%%" % ('=' * progress, ' ' * (50-progress), percent)) 37 | sys.stdout.flush() 38 | 39 | last_percent_reported = percent 40 | 41 | print("downloading " + url) 42 | 43 | urlretrieve(url, dst, reporthook=reporthook) 44 | print() 45 | 46 | 47 | if __name__ == '__main__': 48 | dst = 'kubic.qcow2' 49 | url = base_url + image_name 50 | if os.path.isfile(dst) and local_sha256(dst) == remote_sha256(url): 51 | print('already downloaded.') 52 | else: 53 | download_image(url, dst) 54 | -------------------------------------------------------------------------------- /kubic-kvm.tf: -------------------------------------------------------------------------------- 1 | terraform { 2 | required_version = ">= 0.13" 3 | required_providers { 4 | libvirt = { 5 | source = "dmacvicar/libvirt" 6 | version = "0.6.3" 7 | } 8 | } 9 | } 10 | 11 | provider "libvirt" { 12 | uri = "qemu:///system" 13 | } 14 | 15 | resource "libvirt_volume" "kubic_image" { 16 | name = "kubic_image" 17 | source = "./kubic.qcow2" 18 | } 19 | 20 | resource "libvirt_volume" "os_volume" { 21 | name = "os_volume-${count.index}" 22 | base_volume_id = libvirt_volume.kubic_image.id 23 | count = var.count_vms 24 | } 25 | 26 | resource "libvirt_volume" "data_volume" { 27 | name = "data_volume-${count.index}" 28 | 29 | // 6 * 1024 * 1024 * 1024 30 | size = 6442450944 31 | count = var.count_vms 32 | } 33 | 34 | resource "libvirt_network" "kubic_network" { 35 | name = "kubic-network" 36 | mode = var.network_mode 37 | domain = var.dns_domain 38 | 39 | dns { 40 | enabled = true 41 | } 42 | 43 | addresses = [var.network_cidr] 44 | } 45 | 46 | data "template_file" "ignition_data" { 47 | count = var.count_vms 48 | template = file("commoninit.ign") 49 | 50 | vars = { 51 | hostname = "kubic-${count.index}" 52 | } 53 | } 54 | 55 | resource "libvirt_ignition" "kubic_ignition" { 56 | name = "kubic-ignition-${count.index}" 57 | content = element(data.template_file.ignition_data.*.rendered, count.index) 58 | count = var.count_vms 59 | } 60 | 61 | resource "libvirt_domain" "kubic_domain" { 62 | name = "kubic-kubeadm-${count.index}" 63 | 64 | cpu = { 65 | mode = "host-passthrough" 66 | } 67 | 68 | memory = var.memory 69 | vcpu = var.vcpu 70 | 71 | disk { 72 | volume_id = element(libvirt_volume.os_volume.*.id, count.index) 73 | } 74 | 75 | disk { 76 | volume_id = element(libvirt_volume.data_volume.*.id, count.index) 77 | } 78 | 79 | network_interface { 80 | network_name = "kubic-network" 81 | hostname = "kubic-kubeadm-${count.index}" 82 | wait_for_lease = true 83 | } 84 | 85 | coreos_ignition = element(libvirt_ignition.kubic_ignition.*.id, count.index) 86 | count = var.count_vms 87 | } 88 | 89 | output "ips" { 90 | value = libvirt_domain.kubic_domain.*.network_interface.0.addresses 91 | } 92 | -------------------------------------------------------------------------------- /mk-ssh-config.sh: -------------------------------------------------------------------------------- 1 | # Git does not atore information about full file permissions, only about the 2 | # executable bit. 3 | chmod 600 ssh_id_shared 4 | 5 | cat < ssh_config 6 | Host $(echo $(terraform output -json | jq -r '.ips.value[][]')) 7 | User root 8 | IdentityFile $PWD/ssh_id_shared 9 | StrictHostKeyChecking no 10 | UserKnownHostsFile=/dev/null 11 | EOF 12 | -------------------------------------------------------------------------------- /ssh_id_shared: -------------------------------------------------------------------------------- 1 | -----BEGIN RSA PRIVATE KEY----- 2 | MIIEogIBAAKCAQEAthu5NMxgI3ftC84Wz3Bi5HSayfy2y6xcbV3vizwJK6YYs30c 3 | XWaUguw76+VXsK5Hf5H2Dm4g3Or9twx8c3IpVQthxi0FDXlHq/2BNZi+JZ1wtTN3 4 | G+HlPryfxsq/V1TjkXg0QwQsKLmi+yM4GDQrJtDub9s/8PboJ0S68lGNfNP6CBnh 5 | P2jiNR0YemDrCJ+0d0b+ecvAmEqrG5pR1ogwuomSAmbb2C2JlJgoD19hYNnk/mkW 6 | wErVHFBEZvIduOn7NSscsHRxyP+qNxNTTSDyENC3cyJ+Wlr0wneg+ddS+K3/5Oc2 7 | 3cPxqpdAMoBwUf8J54AeYEgxESyn4oM3iJQinwIDAQABAoIBAAOPPSqECCkJUg/W 8 | Amohlz1B7jiegPAwOUpF+MWu8brxry/q9R/6PlLkzTMKM5GXhnw+3SFhE7FdwoHO 9 | c6xKAfbQlyOpg5zEzxrUhK8Igkb38dkI3X4lBzcXtsPK+Lx7Q0t3nwXkUfylzEK+ 10 | aH1In8NNeCuljHVoThdeZ40O/QYAkkFOxyRuiUJHDBoAe09ofQNfCwVOCjhLJZ31 11 | 4TlbcPNlYoISKBztDqtSqxuIZy4eQIqnliXn7VlV36qqKyFDomMiR0Do0L00XitH 12 | XChiwPs+etW2+RAyQY1Oib4XZqmIxSjR/f6UhiQ0TTmjSBLnWe6KAFKw06v75Bc2 13 | YoaobakCgYEA5GO/BW9rlL/TfMSg5D6XxRaQRhsudOt70ikXm7OS/xqxS+h+Chwu 14 | q1bpVxAOD/OAbxO07LbK4559ejLrh29PB4QcsPFG//jgzHS+evsctdXNSdEQwF3S 15 | Sm/uSBV6S/sGVMH1Fg8LNKbqIKYz48GEbivuCEaV9jLKesiiqjLgfhUCgYEAzB+m 16 | 6MKqB4zO1A5dPcSs7AItJjbVWMxPXWwdwOF51CFGzoDlYprJlzhrYgs0zDoaYMCC 17 | 15pfHjQ8gcCMhgOB11wwhEpBTKNVjH5HXkQ+t1WzRmy/2bse/4sTB6Ev6W1IASa2 18 | aW+xMy0nvdYj1qtfdmJA+i8Mr9CugGpRt0sefuMCgYA+2oSThlphEXmueJ6esesq 19 | vk7uPETIwJXO/KgWnZDyy/HHJjCpr5/YX47P+wcjtKu/5fiAvL2RbuixXJodJ7Dk 20 | LKOIvp3/jAqxud9CESGRmUlp6zNk/W0GN0+oXuDNUEQpx0cfzvwSfW0plxPotjUv 21 | 7L8RX/udSdUXfWfm1yGZEQKBgFs7DlNbpbjIIyy92sifnZXCB0HcIhCVCCe+CbJK 22 | VDQOR2JGU791ZQI0UjI4xfk9QsrZX+FS+o46VIy9bVD8QkzpxDlsIrFJExQ+4FDu 23 | eYVhRUYFlt2Od3VJSFERpqNSl2sETWTkabNwzCFZkxz/7SOxGE95NddikouMeUdN 24 | yKx3AoGAOp6PfnqgxrbFp6O46NcRXtWNLKKulsi/m1mmPAuDsHQJPYKjpsi9iB8a 25 | jSM46H8miC4aqfCln5pDHy0kG7vG//0R0SnByzy5KW+KbAvv2eDU2WO8b9SMXkmH 26 | tGE3GP+Pj4qHaTLacHos6s6W2UOSMWxU1cWUGikgpVXdQngx9bY= 27 | -----END RSA PRIVATE KEY----- 28 | -------------------------------------------------------------------------------- /terraform.tfvars.sample: -------------------------------------------------------------------------------- 1 | count_vms = 3 2 | memory = 2048 3 | vcpu = 2 4 | -------------------------------------------------------------------------------- /variables.tf: -------------------------------------------------------------------------------- 1 | variable "dns_domain" { 2 | description = "DNS domain name" 3 | default = "kubic.local" 4 | 5 | } 6 | 7 | variable "network_cidr" { 8 | description = "Network CIDR" 9 | default = "10.16.0.0/24" 10 | } 11 | 12 | variable "network_mode" { 13 | description = "Network mode" 14 | default = "nat" 15 | } 16 | 17 | variable "count_vms" { 18 | description = "number of virtual-machine of same type that will be created" 19 | default = 3 20 | } 21 | 22 | variable "memory" { 23 | description = "The amount of RAM (MB) for a node" 24 | default = 2048 25 | } 26 | 27 | variable "vcpu" { 28 | description = "The amount of virtual CPUs for a node" 29 | default = 2 30 | } 31 | --------------------------------------------------------------------------------