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96 lines
3.3 KiB
Markdown
96 lines
3.3 KiB
Markdown
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# Constellation images
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We use the [Fedora CoreOS Assembler](https://coreos.github.io/coreos-assembler/) to build the base image for Constellation nodes.
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## Setup
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1. Install prerequisites:
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- [Docker](https://docs.docker.com/engine/install/) or [Podman](https://podman.io/getting-started/installation)
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- [Azure CLI](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli-linux)
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- [azcopy](https://docs.microsoft.com/en-us/azure/storage/common/storage-use-azcopy-v10)
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- [Google Cloud CLI](https://cloud.google.com/sdk/docs/install)
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- [gsutil](https://cloud.google.com/storage/docs/gsutil_install#linux)
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- Ubuntu:
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```shell-session
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sudo apt install -y bash coreutils cryptsetup-bin grep libguestfs-tools make parted pv qemu-system qemu-utils sed tar util-linux wget
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```
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2. Log in to GCP and Azure
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```shell-session
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gcloud auth login
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az login
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```
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3. [Log in to the ghcr.io package registry](https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#authenticating-to-the-container-registry)
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4. Ensure read and write access to `/dev/kvm` (and repeat after every reboot)
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```shell-session
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sudo chmod 666 /dev/kvm
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```
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## Configuration
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Create a configuration file in `image/config.mk` to override any of the variables found at the top of the [Makefile](Makefile).
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Important settings are:
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- `COORDINATOR_BINARY`: path to a coordinator binary. Can be substituted with a path to a `debugd` binary if a debug image should be built. The binary has to be built before!
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- `CONTAINER_ENGINE`: container engine used to run COSA. either `podman` or `docker`.
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- `COSA_INIT_REPO`: Git repository containing CoreOS config. Cloned in `cosa-init` target.
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- `COSA_INIT_BRANCH`: Git branch checked out from `COSA_INIT_REPO`. Can be used to test out changes on another branch before merging.
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- `NETRC` path to a netrc file containing a GitHub PAT. Used to authenticate to GitHub from within the COSA container.
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- `GCP_IMAGE_NAME`: Image name for the GCP image. Set to include a timestamp when using the build pipeline. Can be set to a custom value if you wat to upload a custom image for testing on GCP.
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- `AZURE_IMAGE_NAME`: Image name for the Azure image. Can be set to a custom value if you wat to upload a custom image for testing on Azure.
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Example `config.mk` to create a debug image with docker and name it `my-custom-image`:
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```Makefile
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COORDINATOR_BINARY = ../build/debugd
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CONTAINER_ENGINE = docker
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GCP_IMAGE_NAME = my-custom-image
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AZURE_IMAGE_NAME = my-custom-image
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```
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## Build an image
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> It is always advisable to create an image from a clean `build` dir.
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Clean up the `build` dir and remove old images (⚠ this will undo any local changes to the CoreOS configuration!):
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```shell-session
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sudo make clean
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```
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- Build QEMU image (for local testing only)
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```shell-session
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make coreos
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```
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- Build Azure image (without upload)
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```shell-session
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make image-azure
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```
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- Build Azure image (with upload)
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```shell-session
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make image-azure upload-azure
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```
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- Build GCP image (without upload)
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```shell-session
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make image-gcp
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```
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- Build GCP image (with upload)
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```shell-session
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make image-gcp upload-gcp
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```
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Resulting images for the CSPs can be found under [images](images/). QEMU images are stored at `build/builds/latest/` with a name ending in `.qcow2`.
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