Today I want write down some lessons learned from my research about CDNs (=Content delivery network) for a high volume and high traffic site.
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In the current time is prometheus THE monitoring and alerting tool. I describe here how you can setup the node_exporter on a Raspbian based Solution.
A lot of OpenShift user want to use more external available ports to reach Applications inside a OpenShift cluster then 80 or 443. I describe here how you can setup a so called ingress port and some pitfalls which could happen and how you can prevent these.
I have asked me several times which scripts can I call in OpenVPN. The documentation is very detailed but it’s big and not intend to be a step by step tutorial, AFAIS (=As far as I see). I write this blog post for me and all others which have the same issue.
One of the difficult parts in the current container world is to debug the network communication. For a haproxy based setup can you use the solution described in this blog post.