DRBD-Cookbook. Joerg Christian Seubert

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      DRBD-Cookbook

      How to create your own cluster solution, without SAN or NAS!

Joerg Christian Seubert

      1. Edition

      Contents

      1 Introduction 1.1 Syntax of that book 1.2 Built-in bugs 1.3 Hostnames 2 Installation 2.1 Software 2.2 Requirements 3 Preliminary considerations 3.1 Disk drive – physically vs. LVM 3.2 Filesystem on the disk device 3.2.1 UFS / ext2 3.2.2 ext3 / ext4 3.2.3 xfs 3.2.4 BtrFS 3.2.5 OCFS2 3.2.6 Conclusion 4 Configuration-Basics on a two-node-cluster-array 4.1 SSH-Configuration 4.1.1 SSH-Key-Types 4.1.2 Recipe: Generate and distribute SSH keys 4.2 Configuration of the locale Disk devices 4.2.1 Recipe: Create LVM volume via YaST 4.2.2 Recipe: Create a LVM-Volume via shell 4.3 DRBD configuration 4.3.1 Performance 4.3.2 /etc/drbd.conf 4.3.3 /etc/drbd.d/global_common.conf 4.3.4 Resourceconfiguration 4.3.5 Resource Description: 4.3.6 Alternative notation 4.3.7 Ports 4.3.8 Recipe: Command sequence for the basic configuration 5 Data transmission in the backbone LAN 5.1 Recipe: Backbone LAN in the DRBD configuration 6 Multi-node cluster 6.1 Stacking-Device 6.1.1 Recipe: Commissioning a stacking device with DRBD8 under SLES11 SP4 6.1.2 Recipe: Commissioning a stacking device with DRBD9 under OpenSuSE 15.1 6.2 RAID1 over at least three nodes 7 Hardened cluster 7.1 Detecting the state of the firewall 7.2 Firewallzones 7.3 Build a new firewall-service 7.4 Build a new zone 7.5 Basics of a two-stage hardening concept 7.5.1 Hardening with the firewall 7.5.2 Hardening with the Secure-Shell-Options 8 Increase / decrease the size of the DRBD device 8.1 Unofficial method 8.1.1 Concept 8.1.2 Command sequence 8.2 The official way 9 Program your own cluster solution 9.1 Configuration file 9.1.1 Content of the configuration file 9.2 Virtual IP-address 9.2.1 Script explanation for my_virt_ip.pl: 9.3 Make database switchable 9.3.1 Script explanation for my_dev_switch.pl: 9.4 Communication between cluster nodes - the Horcher 9.4.1 Script explanation for my_horcher.pl: 9.5 Controlscript 9.5.1 Script explanation for my_control.pl: 9.6 Service control scripts for systemd 9.6.1 Explanation for mycluster_horcher.service: 9.6.2 Explanation for mycluster_control.service: 9.7 Initialization script for the cluster controller 9.7.1 Explanation for my_service.pl: 9.8 Maintenance 9.9 General information about the scripts 10 Include DRBD in Veritas Cluster 10.1 Include DRBD as Veritas-Agent 10.2 Increase or decrease a DRBD-Device, which is included in the Veritas-Cluster 11 DRBD and Docker 11.1 Preparation and first start of the container 11.2 Work with the container 12 Win-DRBD 13 SSH-Configuration on SLE 15 / OpenSuSE Leap 15.x 14 Creating a LVM-Volume-Group 14.1 YaST 14.2 Shell 15 Stop,