Flatcar based clusters

* Override name used for init and join configurations on flatcar
* Use a dictionary merge to selectively replace the name field with
  CORES_OPENSTACK_HOSTNAME when flatcarOS is true
* disable some subcharts by default
* Change flatcar to more agnostic term "ignitionBased"
* local Gitlab setup for publishing helm packages.
* semantic version tag triggers packaging and push to local package
  repository (GitLab and OCI registry)

charts/openstack-cluster/templates/_helpers.tpl

@@ -141,12 +141,19 @@ mirrors and additional packages.
 */}}
 {{- define "openstack-cluster.kubeadmConfigSpec" -}}
 {{- $ctx := index . 0 }}
+{{/* WARN(travis) Ignition based images. */}}
+{{- $ignitionBasedOS := $ctx.Values.ignitionBasedOS }}
+{{- $ignitionContainerLinuxConfig := $ctx.Values.ignitionContainerLinuxConfig }}
+{{- $ignitionPreKubeadmCommands := $ctx.Values.ignitionPreKubeadmCommands }}
 {{- $registryMirrors := $ctx.Values.registryMirrors }}
 {{- $additionalPackages := $ctx.Values.additionalPackages }}
 {{- $trustedCAs := $ctx.Values.trustedCAs }}
 {{- $kubeadmConfigSpec := omit (index . 1) "files" "preKubeadmCommands" }}
 {{- $files := index . 1 | dig "files" list }}
 {{- $preKubeadmCommands := index . 1 | dig "preKubeadmCommands" list }}
+{{- if $ignitionBasedOS }}
+{{- $kubeadmConfigSpec := mergeOverwrite $kubeadmConfigSpec $ctx.Values.ignitionKubeadmConfigSpec }}
+{{- end }}
 
 {{- with $kubeadmConfigSpec }}
 {{- toYaml . }}
@@ -201,7 +208,13 @@ files:
   - {{ toYaml . | nindent 4 }}
   {{- end }}
 {{- end }}
-{{- if or $trustedCAs $additionalPackages $preKubeadmCommands }}
+{{- if $ignitionBasedOS }}
+{{/* WARN(travis) Ignition based images. */}}
+{{- with $ignitionContainerLinuxConfig }}
+{{- toYaml . }}
+{{- end }}
+{{- end }}
+{{- if or $trustedCAs $additionalPackages $preKubeadmCommands $ignitionBasedOS }}
 preKubeadmCommands:
   {{- if $trustedCAs }}
   - update-ca-certificates
@@ -213,5 +226,22 @@ preKubeadmCommands:
   {{- range $preKubeadmCommands }}
   - {{ . }}
   {{- end }}
+  {{- range $ignitionPreKubeadmCommands }}
+  - {{ . }}
+  {{- end }}
 {{- end }}
 {{- end }}
+{{/* WARN(travis) Ignition based images */}}
+{{- if .Values.ignitionBasedOS }}
+{{- with .Values.ignitionContainerLinuxConfig }}
+{{ toYaml . }}
+{{- end }}
+{{- end}}
+
+{{/*
+Produces the image for the cluster autoscaler.
+*/}}
+{{- define "openstack-cluster.autoscaler.image" -}}
+{{- $prefix := .Values.autoscaler.image.prefix | default .Values.global.imagePrefix | default "" }}
+{{- printf "%s%s:%s" $prefix .Values.autoscaler.image.repository .Values.autoscaler.image.tag -}}
+{{- end }}

charts/openstack-cluster/templates/control-plane/kubeadm-control-plane.yaml

@@ -14,6 +14,10 @@ option of InitConfiguration and specifying a KubeProxyConfiguration.
 {{- $initConfiguration := omit (index . 1 | dig "initConfiguration" dict) "skipPhases" }}
 {{- $skipPhases := index . 1 | dig "initConfiguration" "skipPhases" list }}
 {{- $kubeProxyConfiguration := index . 1 | dig "kubeProxyConfiguration" dict }}
+{{- $ignitionBasedOS := $ctx.Values.ignitionBasedOS }}
+{{- if $ignitionBasedOS }}
+{{- $initConfiguration := mergeOverwrite $initConfiguration $ctx.Values.ignitionInitConfiguration }}
+{{- end}}
 {{- $files := index . 1 | dig "files" list }}
 {{- $preKubeadmCommands := index . 1 | dig "preKubeadmCommands" list }}
 
@@ -58,9 +62,11 @@ preKubeadmCommands:
   {{- if $skipPhases }}
   - cat /run/kubeadm/skip-phases.yaml >> /run/kubeadm/kubeadm.yaml
   {{- end }}
+  {{- if not $ignitionBasedOS }}
   {{- if $kubeProxyConfiguration }}
   - cat /run/kubeadm/kube-proxy-configuration.yaml >> /run/kubeadm/kubeadm.yaml
   {{- end }}
+  {{- end }}
 {{- end }}
 {{- end }}
 

charts/openstack-cluster/values.yaml

@@ -16,6 +16,38 @@ cloudName: openstack
 # This should match the version of kubelet and kubeadm in the image
 kubernetesVersion:
 
+# WARN(travis) Ignition based images
+ignitionBasedOS: false
+ignitionInitConfiguration:
+  nodeRegistration:
+    name: ${COREOS_OPENSTACK_HOSTNAME}
+ignitionKubeadmConfigSpec:
+  joinConfiguration:
+    nodeRegistration:
+      name: ${COREOS_OPENSTACK_HOSTNAME}
+ignitionPreKubeadmCommands:
+  - export COREOS_OPENSTACK_HOSTNAME=${COREOS_OPENSTACK_HOSTNAME%.*}
+  - envsubst < /etc/kubeadm.yml > /etc/kubeadm.yml.tmp
+  - mv /etc/kubeadm.yml.tmp /etc/kubeadm.yml
+ignitionContainerLinuxConfig:
+  format: ignition
+  ignition:
+    containerLinuxConfig:
+      additionalConfig: |
+        systemd:
+          units:
+          - name: [email protected]
+            enabled: true
+          - name: kubeadm.service
+            enabled: true
+            dropins:
+            - name: 10-flatcar.conf
+              contents: |
+                [Unit]
+                Requires=containerd.service coreos-metadata.service
+                After=containerd.service coreos-metadata.service
+                [Service]
+                EnvironmentFile=/run/metadata/flatcar
 # The name of the image to use for cluster machines
 machineImage:
 # OR