linux_wiki:os_install_vm_template

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linux_wiki:os_install_vm_template [2016/05/09 22:36]
billdozor [Add/Expand Storage] 		linux_wiki:os_install_vm_template [2019/05/25 23:50] (current)
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 ---- ----
  
-===== Create the Virtual Machine =====+====== Create the Virtual Machine ======
  
   * Create a new virtual machine.   * Create a new virtual machine.
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 ---- ----
  
-==== Partitioning ====+===== Partitioning =====
  
 Red Hat Recommendations Red Hat Recommendations
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 After a CentOS 7.2 minimal install, the disk usage with that partitioning looks like this:\\ After a CentOS 7.2 minimal install, the disk usage with that partitioning looks like this:\\
 TODO - SCREENSHOT TODO - SCREENSHOT
 +
 +----
 +
 +====== System Configuration =====
 +
 +Modify the OS with changes you want to be included on ALL systems. They should be server role generic.
  
 ---- ----
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 **Proceed to "CentOS 6: VM Cleanup" before creating template.** **Proceed to "CentOS 6: VM Cleanup" before creating template.**
 +
 +----
 +
 +===== CentOS 6: VM Cleanup =====
 +
 +Perform any other customizations/installs prior to the following steps.
 +
 +<code bash>
 +# Cleanup => Remove ssh host keys (so each deployed VM has a different fingerprint)
 +rm -f /etc/ssh/ssh_host_*
 +
 +# Cleanup => Remove persistent rules and network hw address - prevents eth0 from incrementing
 +rm -f /etc/udev/rules.d/70-persistent-*
 +sed -i "/HWADDR/d" /etc/sysconfig/network-scripts/ifcfg-eth0
 +sed -i "/UUID/d" /etc/sysconfig/network-scripts/ifcfg-eth0
 +
 +# Cleanup => Remove some of root's files
 +rm -f /root/anaconda-ks.cfg /root/install.log*
 +
 +# Cleanup => remove tmp files
 +rm -rf /tmp/*
 +
 +# Cleanup => stop auditd from logging, remove log files
 +# Stop any other service that actively logs to sub directories of /var/log
 +# Recommended to install sysstat (sar) during a post deployment phase.
 +service auditd stop
 +rm -rf /var/log/*
 +mkdir /var/log/audit
 +
 +# Update locate's database
 +updatedb
 +
 +# Clear history and shutdown for template cloning
 +history -c && history -w
 +shutdown -P now
 +</code>
 +
 +  * Create a VM Template from the powered off system.
  
 ---- ----
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 **Proceed to "CentOS 7: VM Cleanup" before creating template.** **Proceed to "CentOS 7: VM Cleanup" before creating template.**
- 
----- 
- 
-===== CentOS 6: VM Cleanup ===== 
- 
-Perform any other customizations/installs prior to the following steps. 
- 
-<code bash> 
-# Cleanup => Remove ssh host keys (so each deployed VM has a different fingerprint) 
-rm -f /etc/ssh/ssh_host_* 
- 
-# Cleanup => Remove persistent rules and network hw address - prevents eth0 from incrementing 
-rm -f /etc/udev/rules.d/70-persistent-* 
-sed -i "/HWADDR/d" /etc/sysconfig/network-scripts/ifcfg-eth0 
-sed -i "/UUID/d" /etc/sysconfig/network-scripts/ifcfg-eth0 
- 
-# Cleanup => Remove some of root's files 
-rm -f /root/anaconda-ks.cfg /root/install.log* 
- 
-# Cleanup => remove tmp files 
-rm -rf /tmp/* 
- 
-# Cleanup => stop auditd from logging, remove log files 
-# Stop any other service that actively logs to sub directories of /var/log 
-# Recommended to install sysstat (sar) during a post deployment phase. 
-service auditd stop 
-rm -rf /var/log/* 
-mkdir /var/log/audit 
- 
-# Update locate's database 
-updatedb 
- 
-# Clear history and shutdown for template cloning 
-history -c && history -w 
-shutdown -P now 
-</code> 
  
 ---- ----
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 </code> </code>
  
----- +  * Create a VM Template from the powered off system.
- +
-===== Add/Expand Storage ===== +
- +
-After deploying a VM from the template, you may need to expand storage on one of the partitions. +
- +
-  - Add an additional hard disk to the VM. (Either from initial deployment or hot add to the VM) +
-  - Verify disk device name to use:<code bash>fdisk -l</code> +
-  - Create a new partition on the disk and format it as a “8e” (Linux LVM) type +
-    - fdisk /dev/sdb +
-      - Command: n +
-      - Command action (primary partition): p +
-      - Partition number: 1 +
-      - First cylinder: enter for default of the first +
-      - Last cylinder: enter for default of the last +
-      - Command: t +
-      - Selected partition 1 (message displayed when only 1 partition exists) +
-      - Hex code: 8e (for LVM) +
-      - Command: w +
-  - Create a LVM physical disk from the partition<code bash>pvcreate /dev/sdb1</code> +
-  - Add the new physical disk to the existing volume group<code bash>vgextend vglocal /dev/sdb1</code> +
-  - Extend the logical volume that needs the space (/home will be used in this example) +
-    - **Option 1 (Preferred)**: Move the physical extents of the logical volume to the new disk, so all of it resides on the same VMDK, and then use all of that new disk's space. +
-      * This method is preferred because there is a performance hit when a partition spans VMDKs +
-      * <code bash>pvmove --name lvhome /dev/sda2 /dev/sdb1 +
-lvextend --resizefs /dev/mapper/vglocal-lvhome /dev/sdb1</code> +
-    - Option 2: Give the logical volume all of the space from the newly added physical volume<code bash>lvextend --resizefs --extents +100%PVS /dev/mapper/vglocal-lvhome /dev/sdb1</code> +
-    - Option 3: Give the logical volume a specific amount of additional free space from a specific physical volume<code bash>lvextend --resizefs --size +10G /dev/mapper/vglocal-lvhome /dev/sdb1</code> +
-    - Option 4: Give the logical volume all of the free space available to the volume group (potentially across multiple physical disks)<code bash>lvextend --resizefs --extents +100%FREE /dev/mapper/vglocal-lvhome</code> +
-  - Verify LVM Allocation +
-    - Logical Volume: <code bash>lvs</code> +
-    - Volume Group: <code bash>vgs</code> +
-    - Physical Volumes: <code bash>pvs</code> +
-  - Grow the file system (Not required if you used "--resizefs" during lvextend) +
-    - Ext2/3/4<code bash>resize2fs /dev/mapper/vglocal-lvhome</code> +
-    - XFS<code bash>xfs_growfs /dev/mapper/vglocal-lvhome</code> +
-  - Verify filesystem space<code bash>df -h</code>+
  
 ---- ----
  
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