Kubernetes - 以软件方式更新ConfigMap

问题描述 投票:1回答:2

我有一个Kubernetes部署,它使用ConfigMap和一些经常更新的配置。目前,我必须通过在本地计算机上运行脚本来手动更新此配置,该脚本通过kubectl更新ConfigMap。

有没有办法使用Kubernetes API以更自动化的方式(来自Kubernetes内部或外部)?

kubernetes
2个回答
2
投票

如果你看看here,有几个Kubernetes客户用多种语言。正式支持Python和Go。您可以通过调用客户端来自动执行这些步骤。

如果您了解Python,可以参考下面的sample

from __future__ import print_statement 
import time 
import kubernetes.client from kubernetes.client.rest 
import ApiException from pprint import pprint

# Configure API key authorization: BearerToken 
kubernetes.client.configuration.api_key['authorization'] = 'YOUR_API_KEY'
# Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
# kubernetes.client.configuration.api_key_prefix['authorization'] = 'Bearer'

# create an instance of the API class api_instance = 
kubernetes.client.CoreV1Api() 
name = 'name_example' # str | name of the ConfigMap 
namespace = 'namespace_example' # str | object name and auth scope, such as for teams and projects 
body = NULL # object |  
pretty = 'pretty_example' # str | If 'true', then the output is pretty printed. (optional)

try: 
    api_response = api_instance.patch_namespaced_config_map(name, namespace, body, pretty=pretty)
    pprint(api_response) 
except ApiException as e:
    print("Exception when calling CoreV1Api->patch_namespaced_config_map: %s\n" % e)

关于在内部和外部使用API​​,您可以查看wiki。特别是这个thread解释了如何从pod访问API。

KUBE_TOKEN=$(</var/run/secrets/kubernetes.io/serviceaccount/token)
curl -sSk -H "Authorization: Bearer $KUBE_TOKEN" https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/namespaces/iot2cloud/configmaps

0
投票
def updateConfigMap(token):
   print(token)
   token = "Bearer {}".format(token)
   headers = {"Content-Type": "application/merge-patch+json", "authorization":token}

r = requests.patch("{}/api/v1/namespaces/default/configmaps/CONFIMAPNAME".format(KUBERNETES_MASTER), verify=False, headers=headers, json=configData)
return r.content

我之前遇到了一些问题,但是当改变了PATCH请求的标题时。我可以更新我的配置文件。但要注意令牌权限(服务帐户)

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