def create_chart(self, *, gen_code_dir, values):
self.__code_dir_prefix = os.path.join(gen_code_dir, self.blueprint_id,
self.deployment_id)
if not os.path.isdir(self.__code_dir_prefix):
try:
os.makedirs(self.__code_dir_prefix)
except OSError:
print("Creation of the directory %s failed" %
self.__code_dir_prefix)
exit(1)
else:
print("Successfully created the directory %s" %
self.__code_dir_prefix)
else:
print("directory %s already exists" % self.__code_dir_prefix)
app = App(
outdir=os.path.join(self.__code_dir_prefix, 'kubectl_manifest'))
HelloApplication(app, 'k8sresources', deployment_variables=values)
app.synth()
#Add Cert-manager manifest
url = 'https://github.com/jetstack/cert-manager/releases/download/v1.1.0/cert-manager.yaml'
urllib.request.urlretrieve(
url,
os.path.join(self.__code_dir_prefix, 'kubectl_manifest',
'cert-manager.yaml'))
def render(self) -> list:
app = App()
combined_resource_collection = ChartResourceCollection.combine(
[self.service_collection, self.ingress_collection])
chart_json = self.__EasyChart(app, self.deployment,
combined_resource_collection).to_json()
yaml_manifest = ""
for manifest in chart_json:
yaml_manifest += f"---\n{yaml.dump(yaml.load(json.dumps(manifest), Loader=yaml.FullLoader))}"
return yaml_manifest
#!/usr/bin/env python
from constructs import Construct
from cdk8s import App, Chart
from imports import k8s
from webservice import WebService
class MyChart(Chart):
def __init__(self, scope: Construct, ns: str):
super().__init__(scope, ns)
# define resources here
WebService(
self,
'todo-app',
image=
'<REPLACE_YOUR_ACCOUNT_NUMBER>.dkr.ecr.us-east-1.amazonaws.com/todo-app:latest',
replicas=1)
app = App()
MyChart(app, "cdk8s")
app.synth()
def __init__(self, scope: Construct, ns: str):
super().__init__(scope, ns)
# 定义标签
label = {"app": "guestbook-ui"}
# 定义 Service 对象
k8s.Service(self, 'service',
spec=k8s.ServiceSpec(
type='NodePort',
ports=[k8s.ServicePort(port=80, target_port=k8s.IntOrString.from_number(80))],
selector=label)
)
# 定义 Deployment 对象
k8s.Deployment(self, 'deployment',
spec=k8s.DeploymentSpec(
replicas=2,
selector=k8s.LabelSelector(match_labels=label),
template=k8s.PodTemplateSpec(
metadata=k8s.ObjectMeta(labels=label),
spec=k8s.PodSpec(containers=[
k8s.Container(
name='guestbook-ui',
image='cnych/ks-guestbook-demo:0.2',
ports=[k8s.ContainerPort(container_port=80)])]))))
app = App()
MyChart(app, "cdk8s-guestbook")
app.synth() # 该方法负责生成生成k8s资源清单文件
def build_chart(chart: EasyChart):
app = App()
combined_resource_collection = ChartResourceCollection.combine(
[chart.service_collection, chart.ingress_collection])
return chart.__EasyChart(app, chart.deployment,
combined_resource_collection).to_json()