https://devopstales.github.io/tags/centos/ Recent content in CentOS on DevOpsTales Hugo -- gohugo.io en Sun, 08 Mar 2026 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-cert/ Sun, 08 Mar 2026 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-cert/ In this post I will show you how you can rotate your Kubernetes Engine Certificates. https://devopstales.github.io/kubernetes/k8s-security/ Fri, 06 Mar 2026 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-security/ Kubernetes offers rich configuration options, but defaults are usually the least secure. Most sysadmins don’t know how to secure a Kubernetes cluster. So this is my Best Practice list for keeping Kubernetes Clusters Secure. https://devopstales.github.io/kubernetes/k8s-secure-install/ Sat, 20 Jan 2024 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-secure-install/ In this post I will show you how to install a Kubernetes cluster in a secure way with. https://devopstales.github.io/kubernetes/k8s-install-with-swap/ Fri, 22 Sep 2023 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-install-with-swap/ Kubeadm is a tool that helps you bootstrap a simple Kubernetes cluster and simplifies the deployment process. In this post I will use kubeadm to install swap enabled kubernetes. https://devopstales.github.io/linux/wazuh-authentication/ Tue, 05 Sep 2023 00:00:00 +0000 https://devopstales.github.io/linux/wazuh-authentication/ In this post I will show you how to configure LDAP Authentication in a Wazuh Open Source SIEM solution. https://devopstales.github.io/linux/wazuh-siem/ Fri, 01 Sep 2023 00:00:00 +0000 https://devopstales.github.io/linux/wazuh-siem/ In this post I will show you how to install and configure the Wazuh Open Source SIEM solution. https://devopstales.github.io/linux/graylog5-pfsense/ Tue, 20 Dec 2022 00:00:00 +0000 https://devopstales.github.io/linux/graylog5-pfsense/ We will parse the log records generated by the PfSense Firewall. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/linux/graylog5-install/ Mon, 19 Dec 2022 00:00:00 +0000 https://devopstales.github.io/linux/graylog5-install/ Graylog is defined in terms of log management platform for collecting, indexing, and analyzing both structured and unstructured data from almost any source. https://devopstales.github.io/kubernetes/k8s-ps/ Tue, 23 Aug 2022 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-ps/ With the release of Kubernetes v1.25, Pod Security Admission has now entered to stable and PodSecurityPolicy is removed. In this article, we cover the key concepts of Pod Security Admission along with how to use it. https://devopstales.github.io/kubernetes/k8s-install-containerd-v2/ Mon, 02 May 2022 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-install-containerd-v2/ Kubeadm is a tool that helps you bootstrap a simple Kubernetes cluster and simplifies the deployment process. https://devopstales.github.io/kubernetes/image-security-admission-controller-v3/ Mon, 21 Jun 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/image-security-admission-controller-v3/ In a previous posts we talked about the anchore-image-validator made by Banzaicloud and the admission-controller made by Anchore. In this post I will show you my own admission-controller for image scanning. https://devopstales.github.io/kubernetes/continuous-image-security/ Tue, 15 Jun 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/continuous-image-security/ In this post I will show you my tool to Continuously scann deployed images in your Kubernetes cluster. https://devopstales.github.io/kubernetes/k8s-prometheus-stack/ Tue, 15 Jun 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-prometheus-stack/ In this tutorial I will show you how to install a prometheus operator to monotor kubernetes and loki to gether logs. https://devopstales.github.io/kubernetes/rke2-calico/ Tue, 25 May 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/rke2-calico/ In this post I will show you how you can install a RKE2 with Calico and encripted VXLAN. https://devopstales.github.io/kubernetes/rke2-cilium/ Mon, 24 May 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/rke2-cilium/ In this post I will show you how you can install a RKE2 with cilium and encripted VXLAN. https://devopstales.github.io/kubernetes/k3s-gvisor/ Fri, 30 Apr 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/k3s-gvisor/ In this post I will show you how you can secure k3s with gVisor. https://devopstales.github.io/kubernetes/k8s-vault/ Wed, 07 Apr 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-vault/ In this post I will show you how you can integrate HashiCorp Vault to Kubernetes easily thanks to Bank-Vaults made by Banzaicloud. https://devopstales.github.io/kubernetes/image-security-admission-controller-v2/ Wed, 31 Mar 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/image-security-admission-controller-v2/ In a previous post we talked about anchore-image-validator made by Banzaicloud. In this post I will show you how I updated that scenario for a real word solution. https://devopstales.github.io/linux/graylog_kafka/ Sat, 20 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/graylog_kafka/ Graylog supports Apache Kafka as a transport for various inputs such as GELF, syslog, and Raw/Plaintext inputs. The Kafka topic can be filtered by a regular expression and depending on the input, various additional settings can be configured. https://devopstales.github.io/linux/graylog4-pfsense/ Mon, 15 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/graylog4-pfsense/ We will parse the log records generated by the PfSense Firewall. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/linux/graylog4-install/ Sun, 14 Mar 2021 00:00:00 +0000 https://devopstales.github.io/linux/graylog4-install/ Graylog is defined in terms of log management platform for collecting, indexing, and analyzing both structured and unstructured data from almost any source. https://devopstales.github.io/kubernetes/k8s-networkpolicy/ Sun, 10 Jan 2021 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-networkpolicy/ In this post I will show you how you can use NetworkPolicys in K8S. https://devopstales.github.io/kubernetes/image-security-admission-controller/ Sun, 13 Dec 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/image-security-admission-controller/ In a previous post we talked about Admission Controllers. In this post I will show you how to use an Admission Controller to test image vulnerabilities. https://devopstales.github.io/kubernetes/rke2-pod-security-policy/ Thu, 10 Dec 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/rke2-pod-security-policy/ In this post I will show you how you can use Pod Security Policys in RKE2. https://devopstales.github.io/kubernetes/admission-controllers/ Mon, 07 Dec 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/admission-controllers/ In this post I will show you how you can use Admission Controllers. https://devopstales.github.io/kubernetes/rke2-airgap-install/ Wed, 25 Nov 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/rke2-airgap-install/ In this post I will show you how you can install a secure Kubernetes Engine variant called RKE2 in a Air-Gap environment. https://devopstales.github.io/kubernetes/k8s-vmware/ Wed, 14 Oct 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-vmware/ In this post I will show you how can you use vmware for persistent storagi on K8S. https://devopstales.github.io/kubernetes/k8s-calico-ebpf/ Tue, 13 Oct 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-calico-ebpf/ In this post I will show you how to install kubernetes Without kube-proxy using calico with eBPF mode. https://devopstales.github.io/kubernetes/k8s-ipvs/ Tue, 13 Oct 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-ipvs/ In this post I will show you how to install kubernetes with kube-proxy IPVS mode. https://devopstales.github.io/kubernetes/how-to-fix-ansible-service-broker-in-openshift-3-11/ Fri, 10 Jul 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/how-to-fix-ansible-service-broker-in-openshift-3-11/ Ansible Service Broker in OpenShift 3.11 is broken as it uses wrong docker tag. https://devopstales.github.io/kubernetes/how-to-fix-cluster-monitoring-operator-in-openshift-3-11/ Fri, 10 Jul 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/how-to-fix-cluster-monitoring-operator-in-openshift-3-11/ Default install use an old image for cluster-monitoring-operator with imagestream false latanci alert problem. https://devopstales.github.io/kubernetes/how-to-fix-registry-console-ui-in-openshift-3-11/ Fri, 10 Jul 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/how-to-fix-registry-console-ui-in-openshift-3-11/ Registry console UI in OpenShift 3.11 is broken on CentOS as it is not available on Docker Hub. https://devopstales.github.io/kubernetes/openshift-cert-manager/ Wed, 10 Jun 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-cert-manager/ cert-manager is a service that automatically creates certificate requests and sign certificate based on annotations. The created certificate will be stored in a secret. https://devopstales.github.io/kubernetes/openshift-auto-approval-csr/ Wed, 27 May 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-auto-approval-csr/ Nodes certificates are not Completely redeployed through playbook but through a different mechanism. https://devopstales.github.io/kubernetes/k8s-install-openebs/ Wed, 20 May 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-install-openebs/ OpenEBS is an open-source project for container-attached and container-native storage on Kubernetes. https://devopstales.github.io/sso/foreman-sso/ Fri, 15 May 2020 00:00:00 +0000 https://devopstales.github.io/sso/foreman-sso/ I this post I will show you how you can configure Foreman to use Keycloak asz an OIDC SSO authentication provider. https://devopstales.github.io/linux/chef-first-cookbook/ Thu, 07 May 2020 00:00:00 +0000 https://devopstales.github.io/linux/chef-first-cookbook/ I this post I will show you how you can create a basic chef structure. https://devopstales.github.io/linux/chef-server-install/ Thu, 30 Apr 2020 00:00:00 +0000 https://devopstales.github.io/linux/chef-server-install/ Chef is a powerful configuration management utility writy in ruby. This post will help you to setup a chef 13 on CentOS 7 https://devopstales.github.io/kubernetes/k8s-kubeadm-ha/ Thu, 02 Apr 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/k8s-kubeadm-ha/ In this post I will show you how to install kubernetes in HA mode with kubeadm, keepaliwed and envoyproxy. https://devopstales.github.io/cloud/photon_basics/ Wed, 04 Mar 2020 00:00:00 +0000 https://devopstales.github.io/cloud/photon_basics/ Project Photon OS is an open source, minimal Linux container host that is optimized for cloud-native applications, cloud platforms, and VMware infrastructure. https://devopstales.github.io/cloud/protonos_vagrant_box/ Tue, 03 Mar 2020 00:00:00 +0000 https://devopstales.github.io/cloud/protonos_vagrant_box/ In this post I will show you how to create a vagrant box from pothonos ISO. https://devopstales.github.io/kubernetes/openshift_4/ Mon, 02 Mar 2020 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift_4/ The Red Hat CodeReady Containers enables you to run a minimal OpenShift 4.2 or newer cluster on your local laptop or desktop computer. https://devopstales.github.io/linux/ceph_backup_benji/ Mon, 24 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/ceph_backup_benji/ In this article I will show you how to use benji to backup CEPH RBD incrementally. https://devopstales.github.io/linux/networkmanagger-dnsmasq/ Mon, 24 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/networkmanagger-dnsmasq/ Imagine you want to test something in a demo setup with 5 machines. You create the necessary VMs in your local environment – but you cannot address them properly by name. With 5 machines you also need to write down the appropriate IP addresses – that’s hardly practical. https://devopstales.github.io/linux/pgbackrest_backup_to_s3/ Fri, 21 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/pgbackrest_backup_to_s3/ In this article I will show you how to use pgBackRest to backup PostgreSQL servers to S3 buckets. https://devopstales.github.io/linux/pgbackrest_backup_server/ Thu, 20 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/pgbackrest_backup_server/ In this article I will show you how to use pgBackRest in a dedicated backup server to backup remote PostgreSQL servers. https://devopstales.github.io/linux/postgresql_pgbackrest/ Wed, 19 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/postgresql_pgbackrest/ In this article I will show you how to use pgBackRest as a backup program for PostgreSQL. https://devopstales.github.io/sso/mattermost-keycloak-sso/ Sun, 16 Feb 2020 00:00:00 +0000 https://devopstales.github.io/sso/mattermost-keycloak-sso/ In this article I will show you how to use Keycloak as an authentication provider for Mattermost Teams Edition. https://devopstales.github.io/linux/postgresql_pg_rewind/ Wed, 05 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/postgresql_pg_rewind/ In this pos I will show you how to perform a rewind on a broken Streamin replication. https://devopstales.github.io/linux/postgresql_replication/ Mon, 03 Feb 2020 00:00:00 +0000 https://devopstales.github.io/linux/postgresql_replication/ In this pos I will show you how to configure Postgresql Streamin replication. https://devopstales.github.io/linux/speed_up_zfs/ Sun, 12 Jan 2020 00:00:00 +0000 https://devopstales.github.io/linux/speed_up_zfs/ In this article I will show you how speed up zfs. https://devopstales.github.io/kubernetes/openshift-secondary-router/ Fri, 20 Dec 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-secondary-router/ I this tutorial I will show you how to create a secondari router for Openshift. https://devopstales.github.io/linux/rundeck-acl/ Tue, 10 Dec 2019 00:00:00 +0000 https://devopstales.github.io/linux/rundeck-acl/ In this post I will configure access control in Rundeck. https://devopstales.github.io/linux/rundeck-ldap/ Mon, 09 Dec 2019 00:00:00 +0000 https://devopstales.github.io/linux/rundeck-ldap/ In this post I will configure Rundeck to use LDAP as a User backend. https://devopstales.github.io/linux/graylog-pfsense-squid/ Sun, 24 Nov 2019 00:00:00 +0000 https://devopstales.github.io/linux/graylog-pfsense-squid/ We will parse the access log records generated by PfSense and squid plugin. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/kubernetes/who-mapping-rbd-device/ Sat, 05 Oct 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/who-mapping-rbd-device/ https://devopstales.github.io/kubernetes/ansible-k8s-install/ Thu, 03 Oct 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/ansible-k8s-install/ Kubespray is a pre made ansible playbook for Kubernetes installation. In this Post I will show you how to use to install a new Kubernetes cluster. https://devopstales.github.io/kubernetes/openshift-kompose/ Sun, 08 Sep 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-kompose/ Kompose is a open source tool that uses docker-compose file to deploy on kubernetes. Openshift is also Kubernetes based and Kompose is support Openshift too. https://devopstales.github.io/linux/elasticsearch-backup/ Sat, 07 Sep 2019 00:00:00 +0000 https://devopstales.github.io/linux/elasticsearch-backup/ Graylog store the log data in elasticsearch so I will show you how to create and restore snapshot with elasticsearch. https://devopstales.github.io/linux/clonedeploy/ Wed, 17 Jul 2019 00:00:00 +0000 https://devopstales.github.io/linux/clonedeploy/ I’ll show you how to create network booting (PXE) with clusterdeploy. https://devopstales.github.io/linux/pxe1/ Tue, 16 Jul 2019 00:00:00 +0000 https://devopstales.github.io/linux/pxe1/ Have you ever needed to troubleshoot or diagnose a problematic computer and you forgot where the utility CD is? We’ll show you how to utilize network booting (PXE) to make that problem a thing of the past. https://devopstales.github.io/linux/graylog3-pfsense/ Thu, 04 Jul 2019 00:00:00 +0000 https://devopstales.github.io/linux/graylog3-pfsense/ We will parse the log records generated by the PfSense Firewall. We already have our graylog server running and we will start preparing the terrain to capture those logs records. https://devopstales.github.io/sso/grafana-sso/ Fri, 28 Jun 2019 00:00:00 +0000 https://devopstales.github.io/sso/grafana-sso/ Configurate Gitab to use Keycloak as SSO Identity Proider. https://devopstales.github.io/kubernetes/openshift-add-node/ Thu, 27 Jun 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-add-node/ Add Nodes to an existing Cluster. https://devopstales.github.io/linux/graylog3-install/ Mon, 24 Jun 2019 00:00:00 +0000 https://devopstales.github.io/linux/graylog3-install/ Graylog is defined in terms of log management platform for collecting, indexing, and analyzing both structured and unstructured data from almost any source. https://devopstales.github.io/monitoring/grafana-loki/ Sat, 22 Jun 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/grafana-loki/ Loki is a Prometheus-inspired logging service for cloud native infrastructure. It’s similar to well-known ELK stack but more simple use and is intended to be used mostly Kubernetes. https://devopstales.github.io/sso/openshift-sso2/ Mon, 17 Jun 2019 00:00:00 +0000 https://devopstales.github.io/sso/openshift-sso2/ Configure Openshift Cluster to use Gitlab as a user backend for login with oauth2 and SSO. https://devopstales.github.io/monitoring/install-prometheus-for-gitlab/ Mon, 10 Jun 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/install-prometheus-for-gitlab/ Prometheus is an open-source monitoring system with a built-in noSQL time-series database. It offers a multi-dimensional data model, a flexible query language, and diverse visualization possibilities. Prometheus collects metrics from http nedpoint. Most service dind’t have this endpoint so you need optional programs that generate additional metrics cald exporters. https://devopstales.github.io/linux/install-mattermost-for-gitlab/ Sun, 09 Jun 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-mattermost-for-gitlab/ Mattermost is an open source on premise alternative of Slack. https://devopstales.github.io/linux/gitlab-install/ Wed, 05 Jun 2019 00:00:00 +0000 https://devopstales.github.io/linux/gitlab-install/ Install Gitab with custom postgresql and nginx proxy. https://devopstales.github.io/linux/sonarkube-install/ Thu, 30 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/sonarkube-install/ Sonarqube Repository OSS is an artifact repository with universal support for popular formats. https://devopstales.github.io/kubernetes/openshift-letsencrypt/ Tue, 28 May 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-letsencrypt/ Thanks to Tomáš Nožička developed openshift-acme as an ACME Controller for OpenShift and Kubernetes clusters. It automatically provision certficates https://devopstales.github.io/sso/nextcloud-sso/ Sat, 25 May 2019 00:00:00 +0000 https://devopstales.github.io/sso/nextcloud-sso/ Nextcloud is a suite of client-server software for creating and using file hosting services. Nextcloud application functionally is similar to Dropbox. https://devopstales.github.io/sso/nexus-sso/ Thu, 23 May 2019 00:00:00 +0000 https://devopstales.github.io/sso/nexus-sso/ Nexus Repository OSS is an artifact repository with universal support for popular formats. https://devopstales.github.io/sso/hashicorp-sso/ Mon, 20 May 2019 00:00:00 +0000 https://devopstales.github.io/sso/hashicorp-sso/ In this post I wil shiw you hiw to configure Hashicorp vault with Keycloak for SSO. https://devopstales.github.io/linux/hashicorp-vault/ Fri, 17 May 2019 00:00:00 +0000 https://devopstales.github.io/linux/hashicorp-vault/ Hashicorp vault is a highly scalable, highly available, environment agnostic way to generate, manage, and store secrets. https://devopstales.github.io/sso/rundeck-sso/ Tue, 14 May 2019 00:00:00 +0000 https://devopstales.github.io/sso/rundeck-sso/ In this post I will use Preauthenticated Mode for Rundeck with mod_auth_openidc and Keycloak https://devopstales.github.io/sso/mod-auth-openidc/ Mon, 13 May 2019 00:00:00 +0000 https://devopstales.github.io/sso/mod-auth-openidc/ Configure Apache plugin to use Keycloak as a user backend for login with OpenID and SSO. https://devopstales.github.io/monitoring/nagios-ncpa/ Tue, 07 May 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/nagios-ncpa/ In this article I will show you how to add Remote Linux machine and it’s services to Nagios Monitoring host using NCPA agent. https://devopstales.github.io/monitoring/nagios-nrpe/ Mon, 06 May 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/nagios-nrpe/ In this article I will show you how to add Remote Linux machine and it’s services to Nagios Monitoring host using NRPE agent. https://devopstales.github.io/linux/awx-install/ Tue, 30 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/awx-install/ AWX is an open source web application that provides a user interface, REST API, and task engine for Ansible. https://devopstales.github.io/linux/awx-docker/ Tue, 30 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/awx-docker/ AWX is an open source web application that provides a user interface, REST API, and task engine for Ansible. https://devopstales.github.io/linux/spacewalk-software-channels/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/spacewalk-software-channels/ In this post I will show you how to create software channels on spacewalk server. https://devopstales.github.io/linux/spacewalk-install/ Mon, 29 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/spacewalk-install/ Spacewalk is an open source Linux systems management solution. Spacewalk is the upstream community project from which the Red Hat Satellite product is derived before Red Hat Satellite Server 6. https://devopstales.github.io/monitoring/centreon-install/ Sat, 27 Apr 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/centreon-install/ Centreon is a free Open Source monitoring software which allows an administrator to easily configure alerts based on thresholds, generate email alerts, add systems to be monitored quickly without the need of configuring complicated configuration files. https://devopstales.github.io/linux/harbor-install/ Thu, 18 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/harbor-install/ Vmware harbor ia an open source trusted cloud native registry project that stores, signs, and scans content. https://devopstales.github.io/kubernetes/openshift-cert/ Wed, 17 Apr 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-cert/ In this post I will show you how can you chnage certificate in Openshift. https://devopstales.github.io/kubernetes/openshift-vmware/ Tue, 16 Apr 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-vmware/ In this post I will show you how can you use vmware for persistent storagi on Openshift. https://devopstales.github.io/sso/openshift-sso/ Sat, 13 Apr 2019 00:00:00 +0000 https://devopstales.github.io/sso/openshift-sso/ Configure Openshift Cluster to use Keycloak as a user backend for login with oauth2 and SSO. https://devopstales.github.io/kubernetes/openshift-ceph/ Fri, 12 Apr 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-ceph/ In this post I will show you how can you use CEPH RBD for persistent storagi on Openshift. https://devopstales.github.io/kubernetes/openshift-ldap/ Fri, 12 Apr 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/openshift-ldap/ Configure Openshift Cluster to use LDAP as a user backend for login with Ansible-openshift https://devopstales.github.io/linux/rundeck/ Tue, 09 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/rundeck/ Rundeck is open source software that powers self-service operations. https://devopstales.github.io/sso/openproject-sso/ Sat, 06 Apr 2019 00:00:00 +0000 https://devopstales.github.io/sso/openproject-sso/ Configurate openproject to use Keycloak as sso Identity Provider. https://devopstales.github.io/sso/gitlab-keycloak/ Sat, 06 Apr 2019 00:00:00 +0000 https://devopstales.github.io/sso/gitlab-keycloak/ Configurate Gitab to use Keycloak as SSO Identity Proider. https://devopstales.github.io/sso/keycloak1/ Fri, 05 Apr 2019 00:00:00 +0000 https://devopstales.github.io/sso/keycloak1/ Keycloak is an open source identity and access management solution. https://devopstales.github.io/sso/keycloak2/ Fri, 05 Apr 2019 00:00:00 +0000 https://devopstales.github.io/sso/keycloak2/ Keycloak is an open source identity and access management solution. https://devopstales.github.io/linux/openproject/ Fri, 05 Apr 2019 00:00:00 +0000 https://devopstales.github.io/linux/openproject/ Openproject is a free and open source, web-based project management and issue tracking tool. https://devopstales.github.io/linux/install-ceph/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-ceph/ Ceph is free and open source distributed objectstorage solution. With Ceph we can easily provide and manage block storage, object storage and file storage. https://devopstales.github.io/kubernetes/ansible-openshift-install/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/kubernetes/ansible-openshift-install/ Ansible-openshift is a pre made ansible playbook for Openshift installation. In this Post I will show you how to use to install a new Openshift cluster. https://devopstales.github.io/linux/ceph-block-device/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/ceph-block-device/ Ceph block devices are thin-provisioned, resizable and store data striped over multiple OSDs in a Ceph cluster. Ceph block devices leverage RADOS capabilities such as snapshotting, replication and consistency. Ceph’s RADOS Block Devices (RBD) interact with OSDs using kernel modules or the librbd library. https://devopstales.github.io/linux/ceph-cephfs/ Tue, 12 Mar 2019 00:00:00 +0000 https://devopstales.github.io/linux/ceph-cephfs/ The Ceph Filesystem (CephFS) is a POSIX-compliant filesystem that uses a Ceph Storage Cluster to store its data. The Ceph filesystem uses the same Ceph Storage Cluster system as Ceph Block Devices, Ceph Object Storage with its S3 and Swift APIs, or native bindings (librados). https://devopstales.github.io/monitoring/prometheus-influxdb/ Sat, 02 Feb 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/prometheus-influxdb/ Use Influxdb to as storage for Prometheus. https://devopstales.github.io/linux/install-postgresql/ Thu, 10 Jan 2019 00:00:00 +0000 https://devopstales.github.io/linux/install-postgresql/ In this pos I will show you how to install Postgresql on difrent Linux distributions. https://devopstales.github.io/monitoring/naemon-influxdb/ Tue, 01 Jan 2019 00:00:00 +0000 https://devopstales.github.io/monitoring/naemon-influxdb/ I prefer to use Naemon (a fork of nagos) with Influxdb as a storage for graphical data. https://devopstales.github.io/monitoring/prometheus-alertmanagger/ Thu, 18 Oct 2018 00:00:00 +0000 https://devopstales.github.io/monitoring/prometheus-alertmanagger/ The Alertmanager handles alerts sent by client applications such as the Prometheus server. https://devopstales.github.io/monitoring/prometheus-node-exporter/ Wed, 17 Oct 2018 00:00:00 +0000 https://devopstales.github.io/monitoring/prometheus-node-exporter/ Install node-exporter to provides detailed information about the system, including CPU, disk, and memory usage. https://devopstales.github.io/monitoring/prometheus-install/ Tue, 21 Aug 2018 00:00:00 +0000 https://devopstales.github.io/monitoring/prometheus-install/ Prometheus is an open-source monitoring system with a built-in noSQL time-series database. It offers a multi-dimensional data model, a flexible query language, and diverse visualization possibilities. Prometheus collects metrics from http nedpoint. Most service dind’t have this endpoint so you need optional programs that generate additional metrics cald exporters.