Creating a Packer Worker Virtual Server
Objective: Create a Virtual Server on CoreWeave Cloud to create images with Hashicorp Packer.
Overview: This process consists of deploying an Ubuntu Virtual Server on CoreWeave Cloud, with the cloned PVC attached. The Virtual Server is then configured with a Docker image to run Packer. Note that this example assumes a cloned PVC was created as explained in the example Copying CoreWeave Images to a Writable PVC.
packer_vs.yaml
780B
Code
configure_packer_docker.sh
1KB
Text
Using packer_vs.yaml, we will deploy our Virtual Server with
kubectl create -f packer_vs.yaml:YAML
packer_vs.yaml
apiVersion: virtualservers.coreweave.com/v1alpha1
kind: VirtualServer
metadata:
name: packer-worker
namespace: tenant-<tenant>
spec:
region: ORD1
os:
type: linux
resources:
cpu:
type: amd-epyc-rome
count: 8
memory: 32Gi
storage:
root:
size: 256Gi
storageClassName: block-nvme-ord1
source:
pvc:
namespace: vd-images
name: ubuntu2004-docker-master-20210629-ord1
additionalDisks:
- name: winsvr2019std
spec:
persistentVolumeClaim:
claimName: winserver2019std-clone-20210701-ord1
users:
- username: <username>
password: <password>
network:
public: true
tcp:
ports:
- 22
initializeRunning: true
kubectl get vs will show us our Virtual Server has been deployed, along with an IP we can use to SSH into:
Using the external IP noted from
kubectl get vs, connect to your Virtual Server via SSH. If you followed Copying CoreWeave Images to a Writable PVC, you’ll notice our root disk is mounted to /dev/vda, and our cloned PVC is mounted to /dev/vdb:
Since our Virtual Server was created using ubuntu2004-docker-master-20210629-ord1, Docker is already installed. Running configure_packer_docker.sh will build a container to provide a consistent environment for using Packer, with all the dependencies installed.
Bash
configure_packer_docker.sh
docker build -t "packer" -f - . <<EOF
FROM ubuntu:20.04
RUN apt-get update && \
DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
libc6-dev libvirt-daemon-system libvirt-dev python3-winrm \
qemu-kvm qemu-utils sshpass unzip curl wget git jq rsync \
genisoimage openssh-client libguestfs-tools \
yamllint moreutils ovmf
RUN wget -O /usr/local/bin/virtctl $(curl -L https://api.github.com/repos/kubevirt/kubevirt/releases/latest | grep browser_download_url.*-linux-amd64 | cut -d : -f 2,3| tr -d \")
RUN wget -O /usr/local/bin/kubectl https://dl.k8s.io/release/$(curl -L https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl
RUN curl -L -s https://releases.hashicorp.com/packer/$(curl -L https://checkpoint-api.hashicorp.com/v1/check/packer | jq -r -M '.current_version')/packer_$(curl -L https://checkpoint-api.hashicorp.com/v1/check/packer | jq -r -M '.current_version')_linux_amd64.zip --output /tmp/packer_linux_amd64.zip
RUN unzip -o /tmp/packer_linux_amd64.zip -d /usr/local/bin/
RUN chmod +x /usr/local/bin/*ctl
RUN rm -rf /tmp/packer_linux_amd64.zip
VOLUME /work
WORKDIR /work
ENV LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1 PACKER_LOG=1
ENV PACKER_CACHE_DIR=/work/cache/packer
EOF
