Category Archives: Docker

Centralized Configuration Management using Hashicorp Vault and Consul.

By | June 4, 2020
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IntroductionThis document discusses configuration management and more specifically a centralized infrastructure which stores sensitive information like usernames, passwords, tokens, TLS certificates, urls endpoints, AWS credentials etc. Configuration management becomes difficult as the application grows and has scaling requirements. This document explores the standards and best practices followed in the industry for implementing stable and secure… Read More »

How to Enable Auto Approval of CSR in Openshift v3.10+

By | May 3, 2020
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There is a Slight Change starting from OpenShift v3.10  Cluster. Nodes certificates are not Completely redeployed through playbook but through a different mechanism which is explained briefly below. Basically, SSL Certificates will be valid for the period of 1 year and around 85% of the certificate lifetime,  the node will trigger a CSR that would have to be approved for… Read More »

How to Renew SSL Certificate of Your OpenShift Cluster – 3.x

By | May 1, 2020
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In this Perticular Article, we will see how we can renew the SSL Certificate in OpenShift Cluster v3.6. This implementation steps will also work in v3.10 and above except major version change like v4.0 Note: In v3.10 and above, there is a slight change. Worker nodes triggers a CSR Which you need to approved manually… Read More »

Setup Docker Swarm Cluster and Understanding its Components.

By | August 17, 2019
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Docker Swarm: It’s an embedded functionality of Docker itself for Container Cluster management. This would be a brief and Simplified guide for Deploying Application to the Docker Swarm Cluster. For more details please have a look at the official documentations. Setup master and Worker Nodes Launch an Ec2 instance, We will create a master and… Read More »

Alert Notification to Slack from Grafana

By | July 20, 2019
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In the last post, we have seen how we can Monitor our Server and can get notified for any of the Alerts using the Alert manger. In this Blog, We Will See how we can Set an Alert and Send Notification to Slack using the Grafana Embedded Alerting System. We Assume that You have grafana… Read More »

Notification to Slack using Prometheus AlertManger

By | June 26, 2019
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Alertmanger manger helps to Send the Notification for any of the Alert generated for your server to either, email, Slack, Hipchat, etc. It is Configured from the command line and has certain configuration files. In one of the Previous blog, we have seen step by step process of setup and configurations of Prometheus, Node Exporter,… Read More »

Creating Dashboard in Grafana

By | June 23, 2019
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After the setup of the Grafana and Prometheus in the previous section of this Article, now we are going to create some attractive Dashboard to Visualize and monitor. In the Previous Section, we have also Seen that how we can add a Data Source to the Grafana and already added Prometheus as a Data Source.So… Read More »