[Addon] add let's encrypt acme support to cert-manager

[charlie0129]

Signed-off-by: Charlie Chiang charlie_c_0129@outlook.com

Description of your changes

Add Let's Encrypt ACME support to cert-manager addon.

Now, we can:

• Automatically get valid wildcard TLS certificates
• Auto renewal

Limitations:

• Currently only Cloudflare DNS is supported and tested.
• Will only acquire wildcard certificates (*.example.com, exmaple.com), but this should be enough for most cases.

Fixes part of #368 , later I will make changes to the Traefik addon as will. So we can use these together to automatically create websites with valid TLS certificates.

Special Note:

The vela version requirement is marked as >=1.6.0-alpha.1 in this addon. This is because a special CUE feature called multiple comprehensions per list is required in this addon, which is only available in CUE v0.3 and later. The master branch of vela have CUE v0.4.4 (which will work fine), but vela v1.5.0 (our latest release) only have CUE v0.2.2, so I have to mark it as >=1.6.0-alpha.1 to prevent problems.

That's why the CI will fail (it is using v1.5.0, I have excluded this addon). But users can still install the last-compatible version of cert-manager (it is a automatic fallback), because the catalog is versioned.

Also fixed some CI problems:

• refactored pending addon list to a file
• remove unprintable characters in logs, to avoid cluttering

How has this code been tested?

Tested with Cloudflare DNS and successfully acquired a TLS certificate

Checklist

I have:

• Title of the PR starts with type (e.g. [Addon] , [example] or [Doc]).
• Updated/Added any relevant documentation and examples.
• New addon should be put in experimental.
• Update addon should modify the version in metadata.yaml to generate a new version.

[charlie0129]

let's hold this pr until v1.6.0-alpha.1 is released

[wonderflow]

hold until 1.6.0-alpha.1

[barnettZQG]

@charlie0129 How to use the ability provided by this addon? BTW, Is it easy to support Aliyun DNS?

[charlie0129]

@charlie0129 How to use the ability provided by this addon?

Once this addon is setup (described in README), a Secret containing a valid TLS certificate will be available. Then this Secret can be added to Ingress (or anything can accept a certificate) to serve encrypted traffic.

I will put a tutorial (using cert-manager in together with traefik to serve HTTPS traffic) in README once I have time to work on it (I am a bit busy lately), so traefik addon will be updated later as well. This is just part of the whole process.

BTW, Is it easy to support Aliyun DNS?

Well, it may require a bit more work since Aliyun DNS is not officially supported. We need to run a additional 3rd-party webhook service to get it working (there is one available here). We can support this in the future.

[barnettZQG]

@charlie0129 How to use the ability provided by this addon?

Once this addon is setup (described in README), a Secret containing a valid TLS certificate will be available. Then this Secret can be added to Ingress (or anything can accept a certificate) to serve encrypted traffic.

I will put a tutorial (using cert-manager in together with traefik to serve HTTPS traffic) in README once I have time to work on it (I am a bit busy lately), so traefik addon will be updated later as well. This is just part of the whole process.

BTW, Is it easy to support Aliyun DNS?

Well, it may require a bit more work since Aliyun DNS is not officially supported. We need to run a additional 3rd-party webhook service to get it working (there is one available here). We can support this in the future.

So, does it only support one domain?

[charlie0129]

So, does it only support one domain?

Right. Currently, one domain with all of its sub domains. That should fit most cases? Multiple domains can be supported. If it is much needed, I can support it in the future.

[barnettZQG]

So, does it only support one domain?

Right. Currently, one domain with all of its sub domains. That should fit most cases. We can support multiple domains if it is much needed.

It is very good if could support multiple domains. Users could create an integration config like the config-tls-certificate, but only need to provide the domain.

[charlie0129]

support multiple domains

Sure, I put this feature request in #368 so I can keep track on it

[wangyikewxgm]

Great work.

[wangyikewxgm]

I think bumping up CI to 1.6.1-alpha1 will break some addon tests.

[charlie0129]

I think bumping up CI to 1.6.1-alpha1 will break some addon tests.

Oh is it? I will revert it. I bump it because otherwise we cannot test cert-manager as it requires 1.6.0-alpha.1.

[wangyikewxgm]

I think bumping up CI to 1.6.1-alpha1 will break some addon tests.

Oh is it? I will revert it. I bump it because otherwise we cannot test cert-manager as it requires 1.6.0-alpha.1.

Yes, fluxcd addon cannot be enabled with 1.6.0 temporarily.

[wangyikewxgm]

LGTM