3 min read
Using the Datadog Python Library we can very easily inject metrics into Datadog. These metrics will fall into the "custom metrics" category. Let's check the python code needed to do so:
16/07/2021
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On Kubernetes, if we want to publish a port that it's listening just to localhost without having to modify the container image we can create another container image to work as a TCP proxy using socat
15/07/2021
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Maybe one of the main challenges about helm is the complexity of it's template rendering engine: It's not very intuitive
14/07/2021
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If we try to install a certificate on a service but we install an incorrect private key, the service will fail, most likely, with some cryptic message. But, how do we make sure that a certificate has been generated using the correct private key? Checking the modulus of each one can help verifying this
13/07/2021
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Using an ALB controller we might face the following error while creating Ingress objects:
$ kubectl describe ingress inspect-green-sonarqube -n inspect-green
Name: inspect-green-sonarqube
Namespace: inspect-green
Address:
Default backend: default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
Rules:
Host Path Backends
---- ---- --------
inspect-green.clarivate.io
/ ssl-redirect:use-annotation (<error: endpoints "ssl-redirect" not found>)
/ inspect-green-sonarqube:http (10.103.202.36:9000)
Annotations: alb.ingress.kubernetes.io/actions.ssl-redirect:
{"Type": "redirect", "RedirectConfig": { "Protocol": "HTTPS", "Port": "443", "StatusCode": "HTTP_301"}}
alb.ingress.kubernetes.io/group.name: inspect-green
alb.ingress.kubernetes.io/listen-ports: [{"HTTP":80},{"HTTPS":443}]
alb.ingress.kubernetes.io/scheme: internal
alb.ingress.kubernetes.io/target-type: ip
kubernetes.io/ingress.class: alb
meta.helm.sh/release-name: inspect-green
meta.helm.sh/release-namespace: inspect-green
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedBuildModel 16m (x19 over 38m) ingress Failed build model due to couldn't auto-discover subnets: unable to discover at least one subnet
This message is telling us that the ALB controller is no able to find the subnets of the requested type. We will have to check the following:
12/07/2021
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