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refactor: Update helm registry initialization
This commit updates the helm registry initialization by separating out the image used for copying the charts to the PVC and using the released mindthegap image directly for serving the bundles. This is a small security enhancement by using the minimal image that mindthegap already provides. This commit also copies a statically compiled version of `cp` to a scratch container in order to us a minimal container with no package manager or shell, again this is a minor security enhancement. This change means that the bundles are copied to a subdirectory on the PVC as globbing cannot be used without a shell present, whereas recursive copying works correctly. This is a breaking change but should not affect any users at this point (e.g. not yet included in any downstream releases). Finally, this commit updates the helm values to use a more structured approach. While this is a breaking change, the Helm chart is only used to generate the clusterctl provider components YAML and as such does not have any impact on existing users.
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‎.envrc‎

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@@ -7,8 +7,8 @@ export DEVBOX_NO_ENVRC_UPDATE=1
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eval "$(devbox generate direnv --print-envrc --env-file .dev-envrc)"
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dotenv_if_exists '.envrc.local'
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dotenv_if_exists '.envrc.e2e'
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source_env_if_exists '.envrc.local'
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source_env_if_exists '.envrc.e2e'
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# check out https://www.jetpack.io/devbox/docs/ide_configuration/direnv/
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# for more details

‎.goreleaser.yml‎

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@@ -44,7 +44,7 @@ before:
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$(helm template {{ .ProjectName }} ./charts/{{ .ProjectName }} \
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--namespace caren-system \
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--set-string image.tag=v{{ trimprefix .Version "v" }}{{ if .IsSnapshot }}-{{ .Runtime.Goarch }}{{ end }} \
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--set-string helmRepositoryImage.tag=v{{ trimprefix .Version "v" }}{{ if .IsSnapshot }}-{{ .Runtime.Goarch }} \
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--set-string helmRepository.images.bundleInitializer.tag=v{{ trimprefix .Version "v" }}{{ if .IsSnapshot }}-{{ .Runtime.Goarch }} \
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--set-string image.repository=ko.local/{{ .ProjectName }}{{ end }} \
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)
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EOF'

‎charts/cluster-api-runtime-extensions-nutanix/README.md‎

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@@ -32,12 +32,14 @@ A Helm chart for cluster-api-runtime-extensions-nutanix
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| deployment.replicas | int | `1` | |
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| env | object | `{}` | |
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| helmAddonsConfigMap | string | `"default-helm-addons-config"` | |
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| helmRepositoryImage.pullPolicy | string | `"IfNotPresent"` | |
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| helmRepositoryImage.repository | string | `"ghcr.io/nutanix-cloud-native/caren-helm-reg"` | |
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| helmRepositoryImage.tag | string | `""` | |
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| helmRepositorySecurityContext.fsGroup | int | `65534` | |
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| helmRepositorySecurityContext.runAsGroup | int | `65534` | |
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| helmRepositorySecurityContext.runAsUser | int | `65534` | |
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| helmRepository.images.bundleInitializer.pullPolicy | string | `"IfNotPresent"` | |
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| helmRepository.images.bundleInitializer.repository | string | `"ghcr.io/nutanix-cloud-native/caren-helm-reg"` | |
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| helmRepository.images.bundleInitializer.tag | string | `""` | |
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| helmRepository.images.mindthegap.pullPolicy | string | `"IfNotPresent"` | |
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| helmRepository.images.mindthegap.repository | string | `"ghcr.io/mesosphere/mindthegap"` | |
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| helmRepository.images.mindthegap.tag | string | `"v1.16.0"` | |
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| helmRepository.securityContext.fsGroup | int | `65534` | |
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| helmRepository.securityContext.runAsUser | int | `65534` | |
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| hooks.ccm.aws.helmAddonStrategy.defaultValueTemplateConfigMap.create | bool | `true` | |
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| hooks.ccm.aws.helmAddonStrategy.defaultValueTemplateConfigMap.name | string | `"default-aws-ccm-helm-values-template"` | |
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| hooks.ccm.aws.k8sMinorVersionToCCMVersion."1.27" | string | `"v1.27.9"` | |

‎charts/cluster-api-runtime-extensions-nutanix/templates/helm-repository.yaml‎

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Original file line numberDiff line numberDiff line change
@@ -62,8 +62,8 @@ spec:
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spec:
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initContainers:
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- name: copy-charts
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image: "{{ .Values.helmRepositoryImage.repository }}:{{ default $.Chart.AppVersion .Values.helmRepositoryImage.tag }}"
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command: ["/bin/sh", "-c", "cp /charts/*.tar /helm-charts"]
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image: "{{ .Values.helmRepository.images.bundleInitializer.repository }}:{{ default $.Chart.AppVersion .Values.helmRepository.images.bundleInitializer.tag }}"
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command: ["/bin/cp", "-r", "/charts/", "/helm-charts/bundles/"]
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imagePullPolicy: "{{ .Values.image.pullPolicy }}"
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volumeMounts:
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- name: charts-volume
@@ -74,13 +74,12 @@ spec:
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- name: serve
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protocol: TCP
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containerPort: 5000
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image: "{{ .Values.helmRepositoryImage.repository }}:{{ default $.Chart.AppVersion .Values.helmRepositoryImage.tag }}"
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image: "{{ .Values.helmRepository.images.mindthegap.repository }}:{{ .Values.helmRepository.images.mindthegap.tag }}"
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imagePullPolicy: "{{ .Values.image.pullPolicy }}"
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command: ["/usr/bin/mindthegap"]
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args:
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- serve
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- bundle
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- --bundle=/helm-charts/helm-charts-*.tar
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- --bundle=/helm-charts/bundles/helm-charts-*.tar
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- --listen-port=5000
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- --listen-address=0.0.0.0
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- --tls-private-key-file=/certs/tls.key
@@ -101,7 +100,7 @@ spec:
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periodSeconds: 1
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priorityClassName: {{ .Values.priorityClassName }}
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securityContext:
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{{ with .Values.helmRepositorySecurityContext }}
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{{ with .Values.helmRepository.securityContext }}
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{{- toYaml . | nindent 8}}
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{{- end }}
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volumes:

‎charts/cluster-api-runtime-extensions-nutanix/values.schema.json‎

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@@ -38,30 +38,51 @@
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"helmAddonsConfigMap": {
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"type": "string"
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},
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"helmRepositoryImage": {
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"helmRepository": {
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"properties": {
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"pullPolicy": {
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"type": "string"
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},
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"repository": {
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"type": "string"
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},
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"tag": {
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"type": "string"
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}
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},
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"type": "object"
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},
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"helmRepositorySecurityContext": {
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"properties": {
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"fsGroup": {
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"type": "integer"
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},
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"runAsGroup": {
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"type": "integer"
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"images": {
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"properties": {
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"bundleInitializer": {
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"properties": {
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"pullPolicy": {
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"type": "string"
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},
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"repository": {
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"type": "string"
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},
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"tag": {
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"type": "string"
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}
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},
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"type": "object"
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},
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"mindthegap": {
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"properties": {
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"pullPolicy": {
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"type": "string"
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},
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"repository": {
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"type": "string"
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},
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"tag": {
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"type": "string"
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}
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},
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"type": "object"
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}
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},
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"type": "object"
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},
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"runAsUser": {
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"type": "integer"
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"securityContext": {
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"properties": {
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"fsGroup": {
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"type": "integer"
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},
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"runAsUser": {
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"type": "integer"
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}
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},
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"type": "object"
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}
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},
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"type": "object"

‎charts/cluster-api-runtime-extensions-nutanix/values.yaml‎

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Original file line numberDiff line numberDiff line change
@@ -132,10 +132,19 @@ image:
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tag: ""
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pullPolicy: IfNotPresent
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helmRepositoryImage:
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repository: ghcr.io/nutanix-cloud-native/caren-helm-reg
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tag: ""
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pullPolicy: IfNotPresent
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helmRepository:
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images:
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bundleInitializer:
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repository: ghcr.io/nutanix-cloud-native/caren-helm-reg
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tag: ""
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pullPolicy: IfNotPresent
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mindthegap:
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repository: ghcr.io/mesosphere/mindthegap
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tag: "v1.16.0"
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pullPolicy: IfNotPresent
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securityContext:
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runAsUser: 65534
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fsGroup: 65534
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140149
# -- Optional secrets used for pulling the container image
141150
imagePullSecrets: []
@@ -160,12 +169,6 @@ resources:
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securityContext:
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runAsUser: 65532
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# The helm-repository containers are based on an Alpine image with a different nonroot user
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helmRepositorySecurityContext:
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runAsUser: 65534
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runAsGroup: 65534
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fsGroup: 65534
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service:
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annotations: {}
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type: ClusterIP

‎hack/addons/mindthegap-helm-registry/Dockerfile‎

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@@ -1,19 +1,19 @@
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ARG MINDTHEGAP_VERSION=v1.14.4
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ARG MINDTHEGAP_VERSION=v1.16.0
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FROM --platform=${BUILDPLATFORM} ghcr.io/mesosphere/mindthegap:${MINDTHEGAP_VERSION} as bundle_builder
3-
# this gets called by goreleaser so the copy source has to be the path relative to the repo root.
4+
# This gets called by goreleaser so the copy source has to be the path relative to the repo root.
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RUN --mount=source=./hack/addons/mindthegap-helm-registry/repos.yaml,target=/repos.yaml \
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["/ko-app/mindthegap", "create", "bundle", "--helm-charts-file=/repos.yaml", "--output-file=/tmp/helm-charts.tar"]
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7-
FROM --platform=${TARGETPLATFORM} ghcr.io/mesosphere/mindthegap:${MINDTHEGAP_VERSION} as mindthegap
8+
FROM --platform=${TARGETPLATFORM} busybox:1.37.0-musl as static-busybox
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9-
FROM --platform=${TARGETPLATFORM} alpine:3.20.3
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# Add mindthegap binary that matches TARGETPLATFORM
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COPY --from=mindthegap /ko-app/mindthegap /usr/bin/mindthegap
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FROM --platform=${TARGETPLATFORM} scratch
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# Add helm charts for the current version
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ARG VERSION
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COPY --from=bundle_builder /tmp/helm-charts.tar /charts/helm-charts-${VERSION}.tar
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# TODO remove me as soon as its not needed to hold multiple versions of helm charts
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COPY --from=ghcr.io/nutanix-cloud-native/caren-helm-reg:v0.14.6 /tmp/helm-charts.tar /charts/helm-charts-v0.14.6.tar
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COPY --from=ghcr.io/nutanix-cloud-native/caren-helm-reg:v0.14.9 /tmp/helm-charts.tar /charts/helm-charts-v0.14.9.tar
18-
VOLUME /certs
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ENTRYPOINT /usr/bin/mindthegap
17+
18+
# Add statically compiled cp to the image used to copy bundles to the mounted PVC at runtime.
19+
COPY --from=static-busybox /bin/cp /bin/cp

‎make/dev.mk‎

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@@ -15,7 +15,7 @@ dev.run-on-kind:
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helm upgrade --install cluster-api-runtime-extensions-nutanix ./charts/cluster-api-runtime-extensions-nutanix \
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--set-string image.repository=ko.local/cluster-api-runtime-extensions-nutanix \
1717
--set-string image.tag=$(SNAPSHOT_VERSION) \
18-
--set-string helmRepositoryImage.tag=$(SNAPSHOT_VERSION) \
18+
--set-string helmRepository.images.bundleInitializer.tag=$(SNAPSHOT_VERSION) \
1919
--wait --wait-for-jobs
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kubectl rollout restart deployment cluster-api-runtime-extensions-nutanix
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kubectl rollout restart deployment helm-repository

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