v0.4.0

The first release candidate for Ignite's biggest release yet!

There are many significant changes compared to before:

New Features

• Make base and kernel OCI images composable for a VM. You can now choose what kernel to combine with what base image freely https://github.com/weaveworks/ignite/pull/105
• Add the GitOps mode for Ignite using ignite gitops https://github.com/weaveworks/ignite/pull/100
• Documentation: https://github.com/weaveworks/ignite/blob/master/gitops
• Make it possible to run ignite create and ignite run declaratively https://github.com/weaveworks/ignite/commit/57333646b52a0e1e3a725340e994b2749b39e5bd
• Documentation: https://github.com/weaveworks/ignite/blob/master/docs/declarative-config.md
• Added Prometheus metrics for ignite-spawn https://github.com/weaveworks/ignite/commit/94abc529972873db3fa3ee954099a4f62d67b6f3
• Documentation: https://github.com/weaveworks/ignite/blob/master/docs/prometheus.md
• Implemented CNI support https://github.com/weaveworks/ignite/commit/a8897532f9f6a8f5c40025f0f93ab2d24f2c7cd3

API Machinery

• Added the ignite.weave.works/v1alpha1 API group with the Ignite API types https://github.com/weaveworks/ignite/commit/ca1edc8e7a61b950811c6145ba2ad53f8cdc2a04
• API reference: https://github.com/weaveworks/ignite/blob/master/api/ignite.md
• This API version will not change in a future version. When improvements are made, it will be to v1alpha2 etc.
• Add a meta API package containing supporting but generic API types for Ignite https://github.com/weaveworks/ignite/commit/09d51abd409ee361e93884baae24ffc92cde63a9
• API reference: https://github.com/weaveworks/ignite/blob/master/api/meta.md
• Create composable interfaces for the internal API machinery: Client -> Cache -> Storage -> RawStorage -> Serializer https://github.com/weaveworks/ignite/pull/93 https://github.com/weaveworks/ignite/pull/96 https://github.com/weaveworks/ignite/pull/99
• The API Machinery used in Ignite is partly based on the Kubernetes API machinery (k8s.io/apimachinery), and hence follows some of the same patterns

New Commands

• Add the ignite inspect command https://github.com/weaveworks/ignite/pull/107
• Add the ignite gitops command https://github.com/weaveworks/ignite/pull/100

Documentation

• Add user-facing documentation and guides https://github.com/weaveworks/ignite/pull/113
• See: https://github.com/weaveworks/ignite/tree/master/docs
• Generate OpenAPI specifications https://github.com/weaveworks/ignite/commit/f1c5bfd473799f712c4c1d8fb276426780c1bf01
• See: https://github.com/weaveworks/ignite/blob/master/api/openapi/openapi_generated.go
• Add API type documentation https://github.com/weaveworks/ignite/commit/218c94723f836b8e2cb82886b8664544933ea605
• See: https://github.com/weaveworks/ignite/blob/master/api
• Added architecture diagram https://github.com/weaveworks/ignite/commit/da53f9fc2f5790edacb5d1b541dd4da8a6089673
• See: https://github.com/weaveworks/ignite/blob/master/docs/architecture.png
• Added graph of module dependencies https://github.com/weaveworks/ignite/commit/be7cc088c671c5728155fb146367a67d4ada4ea6
• See: https://github.com/weaveworks/ignite/blob/master/docs/dependencies.svg

Updated Images

Base Images

• weaveworks/ignite-ubuntu:v0.4.0: https://github.com/weaveworks/ignite/blob/master/images/ubuntu/Dockerfile
• weaveworks/ignite-centos:v0.4.0: https://github.com/weaveworks/ignite/blob/master/images/centos/Dockerfile
• weaveworks/ignite-amazonlinux:v0.4.0: https://github.com/weaveworks/ignite/blob/master/images/amazonlinux/Dockerfile
• weaveworks/ignite-alpine:v0.4.0: https://github.com/weaveworks/ignite/blob/master/images/alpine/Dockerfile

Kernel Images

• weaveworks/ignite-kernel:4.14.123: https://github.com/weaveworks/ignite/blob/master/images/kernel/Dockerfile
• weaveworks/ignite-kernel:4.19.47 (default): https://github.com/weaveworks/ignite/blob/master/images/kernel/Dockerfile
• weaveworks/ignite-amazon-kernel:v0.4.0 (using 4.14.55): https://github.com/weaveworks/ignite/blob/master/images/amazon-kernel/Dockerfile

Internal Improvements

• A significant refactor of the whole application has been made to support the new API machinery
• Add structured logging https://github.com/weaveworks/ignite/pull/110
• Factor out ignite-spawn into its own binary running in the container https://github.com/weaveworks/ignite/commit/0a1965e7203877c591dc79504ce257a57fd00480
• Upgraded the Firecracker version to v0.17.0 https://github.com/weaveworks/ignite/commit/41e3595b9e8d35c24e8cd97037cc1c7045779ee9
• Set Go version to 1.12.6 https://github.com/weaveworks/ignite/commit/d00cce7d2b09e97f8d515c4a6161b11fc6c61a2c

Trying it out / Next Steps!

In short:

export VERSION=v0.4.0
curl -Lo ignite <https://github.com/weaveworks/ignite/releases/download/${VERSION}/ignite
chmod +x ignite
sudo mv ignite /usr/local/bin

A longer installation guide is available here: https://github.com/weaveworks/ignite/blob/master/docs/installation.md