openstack/openstack-helm
Code Issues Proposed changes

Support services in different namespaces

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Pass the service namespace to kubernetes-entrypoint in
order to support dependencies between namespaces.
Add documentation about endpoint/service namespaces.

Change-Id: I208c3240e9f2c8900323595f7b0e488bef5cb1fc
Implements: blueprint entrypoint-namespaces
This commit is contained in:
Grzegorz Grasza (xek) 2017-10-10 09:48:18 +00:00 committed by Pete Birley
parent 4399e39a9c
commit 538e630774
4 changed files with 42 additions and 3 deletions
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5
doc/source/devref/endpoints.rst
View File

@ -98,3 +98,8 @@ Charts should not use hard coded values such as
``http://keystone-api:5000`` because these are not compatible with
operator overrides and do not support spreading components out over
various namespaces.
By default, each endpoint is located in the same namespace as the current
service's helm chart. To connect to a service which is running in a different
kubernetes namespace, a ``namespace`` can be provided to each individual
endpoint.

34
helm-toolkit/templates/endpoints/_service_name_endpoint_with_namespace_lookup.tpl Normal file
View File

@ -0,0 +1,34 @@
{{/*
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.
*/}}
# This function returns endpoint "<namespace>:<name>" pair from an endpoint
# definition. This is used in kubernetes-entrypoint to support dependencies
# between different services in different namespaces.
# returns: the endpoint namespace and the service name, delimited by a colon
{{- define "helm-toolkit.endpoints.service_name_endpoint_with_namespace_lookup" -}}
{{- $type := index . 0 -}}
{{- $endpoint := index . 1 -}}
{{- $context := index . 2 -}}
{{- $typeYamlSafe := $type | replace "-" "_" }}
{{- $endpointMap := index $context.Values.endpoints $typeYamlSafe }}
{{- with $endpointMap -}}
{{- $endpointScheme := .scheme }}
{{- $endpointName := index .hosts $endpoint | default .hosts.default}}
{{- $endpointNamespace := .namespace | default $context.Release.Namespace }}
{{- printf "%s:%s" $endpointNamespace $endpointName -}}
{{- end -}}
{{- end -}}

2
helm-toolkit/templates/snippets/_kubernetes_entrypoint_init_container.tpl
View File

@ -35,7 +35,7 @@ limitations under the License.
- name: INTERFACE_NAME
value: eth0
- name: DEPENDENCY_SERVICE
value: "{{ tuple $deps.services $envAll | include "helm-toolkit.utils.comma_joined_hostname_list" }}"
value: "{{ tuple $deps.services $envAll | include "helm-toolkit.utils.comma_joined_service_list" }}"
- name: DEPENDENCY_JOBS
value: "{{ include "helm-toolkit.utils.joinListWithComma" $deps.jobs }}"
- name: DEPENDENCY_DAEMONSET

4
helm-toolkit/templates/utils/_comma_joined_hostname_list.tpl → helm-toolkit/templates/utils/_comma_joined_service_list.tpl
View File

@ -14,8 +14,8 @@ See the License for the specific language governing permissions and
limitations under the License.
*/}}
{{- define "helm-toolkit.utils.comma_joined_hostname_list" -}}
{{- define "helm-toolkit.utils.comma_joined_service_list" -}}
{{- $deps := index . 0 -}}
{{- $envAll := index . 1 -}}
{{- range $k, $v := $deps -}}{{- if $k -}},{{- end -}}{{ tuple $v.service $v.endpoint $envAll | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}{{- end -}}
{{- range $k, $v := $deps -}}{{- if $k -}},{{- end -}}{{ tuple $v.service $v.endpoint $envAll | include "helm-toolkit.endpoints.service_name_endpoint_with_namespace_lookup" }}{{- end -}}
{{- end -}}