KubraGen Builder: RabbitMQ (Online)¶
kg_rabbitmqonline is a builder for KubraGen that deploys a RabbitMQ server in Kubernetes, downloading and modifying the YAML files at creation time from the Github repository.
KubraGen is a Kubernetes YAML generator library that makes it possible to generate configurations using the full power of the Python programming language.
Repository: https://github.com/RangelReale/kg_rabbitmqonline.git
Documentation: https://kg_rabbitmqonline.readthedocs.org/
Example¶
from kubragen import KubraGen
from kubragen.consts import PROVIDER_GOOGLE, PROVIDERSVC_GOOGLE_GKE
from kubragen.object import Object
from kubragen.option import OptionRoot
from kubragen.options import Options
from kubragen.output import OutputProject, OD_FileTemplate, OutputFile_ShellScript, OutputFile_Kubernetes, \
OutputDriver_Print
from kubragen.provider import Provider
from kg_rabbitmqonline import RabbitMQOnlineBuilder, RabbitMQOnlineOptions, RabbitMQOnlineConfigFile, \
RabbitMQOnlineConfigFileOptions
kg = KubraGen(provider=Provider(PROVIDER_GOOGLE, PROVIDERSVC_GOOGLE_GKE), options=Options({
'namespaces': {
'mon': 'app-monitoring',
},
}))
out = OutputProject(kg)
shell_script = OutputFile_ShellScript('create_gke.sh')
out.append(shell_script)
shell_script.append('set -e')
#
# OUTPUTFILE: app-namespace.yaml
#
file = OutputFile_Kubernetes('app-namespace.yaml')
file.append([
Object({
'apiVersion': 'v1',
'kind': 'Namespace',
'metadata': {
'name': 'app-monitoring',
},
}, name='ns-monitoring', source='app', instance='app')
])
out.append(file)
shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))
shell_script.append(f'kubectl config set-context --current --namespace=app-monitoring')
#
# SETUP: rabbitmq
#
rabbitol_config = RabbitMQOnlineBuilder(kubragen=kg, options=RabbitMQOnlineOptions({
'namespace': OptionRoot('namespaces.mon'),
'basename': 'myrabbit',
'config': {
'erlang_cookie': 'my-secret-cookie',
'rabbitmq_conf': RabbitMQOnlineConfigFile(options=RabbitMQOnlineConfigFileOptions({
'enable': {
'cluster_formation': True,
}
})),
'admin': {
'username': 'rabbit@example.com',
'password': 'my-rabbit-password',
}
},
'kubernetes': {
'volumes': {
'data': {
'persistentVolumeClaim': {
'claimName': 'rabbitmq-storage-claim'
}
}
},
'resources': {
'statefulset': {
'requests': {
'cpu': '150m',
'memory': '300Mi'
},
'limits': {
'cpu': '300m',
'memory': '450Mi'
},
},
},
}
}))
rabbitol_config.ensure_build_names(rabbitol_config.BUILD_ACCESSCONTROL, rabbitol_config.BUILD_CONFIG,
rabbitol_config.BUILD_SERVICE)
#
# OUTPUTFILE: rabbitmq-config.yaml
#
file = OutputFile_Kubernetes('rabbitmq-config.yaml')
out.append(file)
file.append(rabbitol_config.build(rabbitol_config.BUILD_ACCESSCONTROL, rabbitol_config.BUILD_CONFIG))
shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))
#
# OUTPUTFILE: rabbitmq.yaml
#
file = OutputFile_Kubernetes('rabbitmq.yaml')
out.append(file)
file.append(rabbitol_config.build(rabbitol_config.BUILD_SERVICE))
shell_script.append(OD_FileTemplate(f'kubectl apply -f ${{FILE_{file.fileid}}}'))
#
# Write files
#
out.output(OutputDriver_Print())
# out.output(OutputDriver_Directory('/tmp/build-gke'))
Output:
****** BEGIN FILE: 001-app-namespace.yaml ********
apiVersion: v1
kind: Namespace
metadata:
name: app-monitoring
****** END FILE: 001-app-namespace.yaml ********
****** BEGIN FILE: 002-rabbitmq-config.yaml ********
apiVersion: v1
kind: ServiceAccount
metadata:
name: myrabbit
namespace: app-monitoring
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: myrabbit
namespace: app-monitoring
<...more...>
****** END FILE: 002-rabbitmq-config.yaml ********
****** BEGIN FILE: 003-rabbitmq.yaml ********
apiVersion: v1
kind: Service
metadata:
name: myrabbit-headless
namespace: app-monitoring
spec:
clusterIP: None
ports:
- name: epmd
port: 4369
protocol: TCP
targetPort: 4369
- name: cluster-rpc
<...more...>
****** END FILE: 003-rabbitmq.yaml ********
****** BEGIN FILE: create_gke.sh ********
#!/bin/bash
set -e
kubectl apply -f 001-app-namespace.yaml
kubectl config set-context --current --namespace=app-monitoring
kubectl apply -f 002-rabbitmq-config.yaml
kubectl apply -f 003-rabbitmq.yaml
****** END FILE: create_gke.sh ********