Commit 68d172da authored by Raphael Nestler's avatar Raphael Nestler

Explain how to use kaniko with a registry with a custom certificate

parent 89b0be14
......@@ -57,3 +57,26 @@ build:
only:
- tags
```
## Using a registry with a custom certificate
When trying to push to a Docker registry that uses a certificate that is signed
by a custom CA, you might get the following error:
```sh
$ /kaniko/executor --context $CI_PROJECT_DIR --dockerfile $CI_PROJECT_DIR/Dockerfile --no-push
INFO[0000] Downloading base image registry.gitlab.example.com/group/docker-image
error building image: getting stage builder for stage 0: Get https://registry.gitlab.example.com/v2/: x509: certificate signed by unknown authority
```
This can be solved by adding your CA's certificate to the kaniko certificate
store:
```yaml
before_script:
- echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
- |
echo "-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----" >> /kaniko/ssl/certs/ca-certificates.crt
```
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