Add image cache sidecar

- If conf.cache.enabled is true, deploy a sidecar container
  in the region pod with a simplestreams repo populated w/ a Ubuntu image
- If conf.cache.enabled is true, configure MaaS to source the image
  from the sidecar
- Update README

Closes #1

Change-Id: I968614d6fb7ca86589dc6e2efd1f66ae920d03a8
This commit is contained in:
Scott Hussey 2017-11-30 10:15:44 -06:00
parent d3b4cc974f
commit 08c1da5be1
9 changed files with 165 additions and 60 deletions

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@ -13,9 +13,9 @@
# limitations under the License.
MAAS_IMAGE_COMMON ?= maas
REGION_SUFFIX ?= regiond
REGION_SUFFIX ?= region
REGION_IMG_DIR ?= images/maas-region-controller
RACK_SUFFIX ?= rackd
RACK_SUFFIX ?= rack
RACK_IMG_DIR ?= images/maas-rack-controller
CACHE_SUFFIX ?= cache
CACHE_IMG_DIR ?= images/sstream-cache

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@ -1 +1,56 @@
# maas
# MaaS Helm Artifacts
This repository holds artifacts supporting the deployment of [Canonical MaaS](https://maas.io)
in a Kubernetes cluster.
## Images
The MaaS install is made up of two required imags and one optional image. The Dockerfiles
in this repo can be used to build all three. These images are intended to be deployed
via a Kubernetes Helm chart.
### MaaS Region Controller
The regiond [Dockerfile](images/maas-region-controller/Dockerfile) builds a systemD-based
Docker image to run the MaaS Region API server and metadata server.
### MaaS Rack Controller
The rackd [Dockerfile](images/maas-rack-controller/Dockerfile) builds a systemD-based
Docker image to run the MaaS Rack controller and dependent services (DHCPd, TFTPd, etc...).
This image needs to be run in privileged host networking mode to function.
### MaaS Image Cache
The cache image [Dockerfile](images/sstream-cache/Dockerfile) simply provides a point-in-time
mirror of the maas.io image repository so that if you are deploying MaaS somewhere
without network connectivity, you have a local copy of Ubuntu. Currently this only
mirrors Ubuntu 16.04 Xenial and does not update the mirror after image creation.
## Charts
Also provided is a Kubernetes [Helm chart](charts/maas) to deploy the MaaS pieces and
integrates them. This chart depends on a previous deployment of Postgres. The recommended
avenue for this is the [Openstack Helm Postgres chart](https://github.com/openstack/openstack-helm/tree/master/postgresql)
but any Postgres instance should work.
### Overrides
Chart overrides are likely required to deploy MaaS into your environment
* values.labels.rack.node_selector_key - This is the Kubernetes label key for selecting nodes to deploy the rack controller
* values.labels.rack.node_selector_value - This is the Kubernetges label value for selecting nodes to deploy the rack controller
* values.labels.region.node_selector_key - this is the Kubernetes label key for selecting nodes to deploy the region controller
* values.labels.region.node_selector_value - This is the Kubernetes label value for selecting nodes to deploy the region controller
* values.conf.cache.enabled - Boolean on whether to use the repo cache image in the deployment
* values.conf.maas.url.maas_url - The URL rack controllers and nodes should use for accessing the region API (e.g. http://10.10.10.10:8080/MAAS)
### Deployment Flow
During deployment, the chart executes the below steps:
1. Initializes the Postgres DB for MaaS
1. Starts a Pod with the region controller and optionally the image cache sidecar container
1. Once the region controller is running, deploy a Pod with the rack controller and join it to the region controller.
1. Initialize the configuration of MaaS and start the image sync
1. Export an API key into a Kubernetes secret so other Pods can access the API if needed

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@ -49,6 +49,13 @@ function configure_dns {
maas ${ADMIN_USERNAME} maas set-config name=upstream_dns value=${MAAS_DNS_SERVERS}
}
function configure_boot_sources {
if [[ $USE_IMAGE_CACHE == 'true' ]]
then
maas ${ADMIN_USERNAME} boot-source update 1 url=http://localhost:8888/maas/images/ephemeral-v3/daily/
fi
}
KEY=$(maas-region apikey --username=${ADMIN_USERNAME})
maas login ${ADMIN_USERNAME} ${MAAS_ENDPOINT} $KEY
@ -57,6 +64,7 @@ configure_ntp
configure_dns
# make call to import images
configure_boot_sources
maas ${ADMIN_USERNAME} boot-resources import
# see if we can find > 0 images
sleep ${RETRY_TIMER}

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@ -0,0 +1,18 @@
#!/bin/bash
set -x
echo "register-rack-controller URL: ${MAAS_ENDPOINT}"
# register forever
while [ 1 ];
do
if maas-rack register --url=${MAAS_ENDPOINT} --secret="${MAAS_REGION_SECRET}";
then
echo "Successfully registered with MaaS Region Controller"
break
else
echo "Unable to register with ${MAAS_ENDPOINT}... will try again"
sleep 10
fi;
done;

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@ -13,6 +13,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/}}
{{- if .Values.manifests.rack_deployment }}
{{- if empty .Values.conf.maas.url.maas_url -}}
{{- tuple "maas_region_ui" "default" "region_ui" . | include "helm-toolkit.endpoints.keystone_endpoint_uri_lookup" | set .Values.conf.maas.url "maas_url" | quote | trunc 0 -}}
{{- end -}}
@ -86,3 +87,4 @@ spec:
name: maas-etc
defaultMode: 0444
{{ if $mounts_maas_rack.volumes }}{{ toYaml $mounts_maas_rack.volumes | indent 8 }}{{ end }}
{{- end }}

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@ -37,6 +37,8 @@ spec:
image: {{ .Values.images.tags.maas_region }}
imagePullPolicy: {{ .Values.images.pull_policy }}
env:
- name: USE_IMAGE_CACHE
value: {{ .Values.conf.cache.enabled | quote }}
- name: JOB_TIMEOUT
value: {{ .Values.jobs.import_boot_resources.timeout | quote }}
- name: ADMIN_USERNAME

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@ -8,6 +8,7 @@ You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
app: maas-region
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
@ -35,7 +36,7 @@ spec:
{{ end }}
name: proxy
selector:
app: maas-region
{{ tuple $envAll "maas" "region" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 4 }}
{{ if .Values.network.proxy.node_port.enabled }}
type: NodePort
{{ end }}

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@ -1,19 +1,18 @@
{{/*
Copyright 2017 The Openstack-Helm Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/}}
# Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License. */}}
{{- if .Values.manifests.region_statefulset }}
{{- $envAll := . }}
{{- $dependencies := .Values.dependencies.region_controller }}
{{- $mounts_maas_region := .Values.pod.mounts.maas_region.maas_region }}
@ -29,7 +28,7 @@ spec:
template:
metadata:
labels:
app: maas-region
{{ tuple $envAll "maas" "region" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 8 }}
annotations:
spec:
affinity:
@ -39,6 +38,11 @@ spec:
initContainers:
{{ tuple $envAll $dependencies $mounts_maas_region_init | include "helm-toolkit.snippets.kubernetes_entrypoint_init_container" | indent 8 }}
containers:
{{- if .Values.conf.cache.enabled }}
- name: maas-cache
image: {{ .Values.images.tags.maas_cache }}
imagePullPolicy: {{ .Values.images.pull_policy }}
{{- end }}
- name: maas-region
image: {{ .Values.images.tags.maas_region }}
imagePullPolicy: {{ .Values.images.pull_policy }}
@ -94,3 +98,5 @@ spec:
secret:
secretName: {{ .Values.secrets.maas_region.name }}
{{- if $mounts_maas_region.volumes }}{{ toYaml $mounts_maas_region.volumes | indent 8 }}{{ end }}
...
{{- end }}

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@ -61,6 +61,9 @@ dependencies:
- service: maas_db
endpoint: internal
manifests:
region_statefulset: true
rack_deployment: true
images:
tags:
@ -70,6 +73,7 @@ images:
maas_region: quay.io/attcomdev/maas-region:master
bootstrap: quay.io/attcomdev/maas-region:master
export_api_key: quay.io/attcomdev/maas-region:master
maas_cache: quay.io/attcomdev/maas-cache:master
dep_check: quay.io/stackanetes/kubernetes-entrypoint:v0.2.1
pull_policy: IfNotPresent
@ -113,6 +117,8 @@ conf:
override: true
drydock:
bootaction_url: null
cache:
enabled: true
maas:
override:
append:
@ -179,6 +185,13 @@ pod:
region: 1
resources:
enabled: false
test:
limits:
memory: "128Mi"
cpu: "500m"
requests:
memory: "128Mi"
cpu: "500m"
maas_rack:
limits:
memory: "128Mi"