How to setup Email Notification in CACTI
In this tutorial, we are going to show you how to configure Cacti to send e-mails when an alert trigger is activated. In our example, we a...
How to send mail through Gmail On Ubuntu
Postfix is a flexible mail server that is available on most Linux distribution. Though a full feature mail server, Postfix can also be used...
Solution to "Add Data Source" function missing in cacti
Problem: From cact 1.0.X onwards you would not find "+" or Add datasource Option in cacti. cacti_no_add-Datasources Solution: ...
Fix cacti php timezone Error “A valid timezone that matches MySQL and the system”
When installing cacti you may come across these below 2 PHP errors related to a timezone which will prevent you from installation CACTI ...
Kubernetes: Error from server (ServiceUnavailable): the server is currently unable to handle the request (get pods.metrics.k8s.io)
When I am running command kubectl top pods i was getting the below error : root@k8s-master:~# kubectl top pods Error from server (Servi...
Unable to fetch metrics from Kubelet
Error: Failed to scrape node" err="Get \"https://192.168.56.110:10250/metrics/resource\": dial tcp 192.168.56.110:10250...
How to Set permanent DNS nameservers on Ubuntu with resolv.conf
With the default resolv.conf file in ubuntu the nameserver is mentioned as following "nameserver 127.0.0.53". Resolv.conf file...
How to resolve scheduler unhealthy state in Kubernetes , Error: http://127.0.0.1:10251/healthz": dial tcp 127.0.0.1:10251: connect: connection refused
Symptom : When we install the new kubernetes cluster. When we execute the following command: $ kubectl get cs / kubectl get compone...
How to Allow web traffic in iptables in linux (Redhat/CentOS/Oracle linux/Amzon Linux2)
This article describes how to configure your iptables software firewall to allow web traffic on port 80 (HTTP) and port 443 (HTTPS). Pr...
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