How to recover when /boot/grub2/grub.cfg and or the grub directories are missing.
RHEL 7
1. Re-install grub2:
grub2-install /dev/<disk name>
2. Create grub.cfg file:
grub2-mkconfig -o /boot/grub2/grub.cfg
3. Create device.map file if missing:
vi /boot/grub2/device.map
(hd0) /dev/<disk name>
4. Reboot== Process ==
===Adding a new ESXI host into satellite.===
1. In VCENTER make certain that the new ESXi host has all of the appropriate setting configure:
2. Select the server name
3. Click on the configure tab
4. Scroll down to Networking - TCP/IP Configuration
5. On the right windows select the Defalt TCP/IP stack
6. Click edit
7. Fill out all parameters. The most import field for it to show up in Satellite is the Domain. It must have the full domain name here (eg. domainname.com)
===Purchase the needed Red Hat licenses===
===Assign license entitlements on the Red Hat Web Site===
1. Log into the Red Hat Customer portal, Select Subscription Allocations
2. Select the Satellite server name: atlantis.domainname.com
3. Click on the Subscriptions tab
4. Goto the Subscription Name of the product that the entitlement needs to be added
5. Under Entitlements - Set the number of entitlemes you want to assign for that Subscription Name
===Download the new manifest into the Satellite server===
1. In satellite goto click the Content tab then click Red Hat Subscriptions
2. Click the Manage Manifest button (Top Right)
3. Click the Refesh Manifest button
===Configure virt-who===
1. On the terminal of the Satellite server execute: nano /etc/virt-who.d/one.conf
2. Under filter_hosts add the additional server(s) FQDN
3. Save your changes
4. Run the following commands:
systemctl stop virt-who
virt-who --one-shot
systemctl start virt-who
===Attach licenses to hosts===
1. Sometimes this will work automatically, but this is a good section to know in case you have to change any licensing also.
2. In satellite goto click the Hosts tab
3. Find the ESXi server name that was discovered by virt-who (eg. virt-who-vmdev.domainname.com)
4. Click on the server name
5. Click the Content button
6. Click the Subscriptions tab and select Subscriptions
7. If the Service Level is empty click Add
8. Put a check mark next to the subscription you want to apply and click the Add Selected button
9. Now under the List/Remove tab your subscription should show as applied to this server
===Enable notifications for hosts===
1. In satellite goto click the Hosts tab
2. Place a check mark next the the servers that need enabled
3. Click the Select Action tab
4. Select Enable Notifications./prd-b-scheduler
#!/bin/bash
# request dates
echo
echo
echo -e "\033[5m*** PRD B Patching ***\033[0m"
echo
echo Welcome to the DEV server patching scheduler
echo Please be aware that these scripts setup the needed jobs for each environment.
echo Refer to wiki article https://itwiki.domainname.com/index.php/Satellite_Hosts_Updating_Process#Configuration_with_running_count
echo for detail times.
echo
echo -e "\033[1mPatch Date\033[0m"
echo What date are you running the patch?
echo Format: yyyy-mm-dd
read patchdate
echo
echo -e "\033[1mPatch Time\033[0m"
echo Note: Add 4 hours to the time you want to run the job to convert from EST to UTC.
echo Your time must be between 00:00 and 23:59 UTC.
echo The suggested time in UTC would be 08:00. All additional jobs for this environment will be scheduled before or after the main autoreboot job as needed.
echo -e What time in UTC would you like to run the main patch?
echo format hh:mm
read patchtime
# Auto Reboot pull
file1="servers/prd-b-servers-main-autoreboot"
while IFS= read -r list1
do
# display $line or do somthing with $line
printf '%s\n' "$list1"
hammer job-invocation create --description-format "Prd-b server patching - auto reboot" --job-template "Patching: Full update - Auto reboot" --search-query "$list1" --start-at "$patchdate $patchtime"
done <"$file1"
# UM and APIG Autoreboot time split 1
patchtime2=$(date -d "$patchtime today - 180 minutes" +'%H:%M')
echo "$patchtime2"
file2="servers/prd-b-servers-um-apig2-autoreboot"
while IFS= read -r list2
do
# display $line or do somthing with $line
printf '%s\n' "$list2"
hammer job-invocation create --description-format "Prd-b um-apig2 patching: full update - auto reboot" --job-template "Patching: Full update - Auto reboot" --search-query "$list2" --start-at "$patchdate $patchtime2"
done <"$file2"
# UM and APIG Autoreboot time split 2
patchtime3=$(date -d "$patchtime today - 120 minutes" +'%H:%M')
echo "$patchtime3"
file3="servers/prd-b-servers-um-apig3-autoreboot"
while IFS= read -r list3
do
# display $line or do somthing with $line
printf '%s\n' "$list3"
hammer job-invocation create --description-format "Prd-b um-apig3 patching: full update - auto reboot" --job-template "Patching: Full update - Auto reboot" --search-query "$list3" --start-at "$patchdate $patchtime3"
done <"$file3"
# BAM server shutdown
patchtime4=$(date -d "$patchtime today - 45 minutes" +'%H:%M')
echo "$patchtime4"
file4="servers/prd-b-servers-bam-autoreboot"
while IFS= read -r list4
do
# display $line or do somthing with $line
printf '%s\n' "$list4"
hammer job-invocation create --description-format "Prd-b patching: bam server (prd-b) application shutdown/update/reboot" --job-template "Patching: Bam server (QA/UAT/PRD) application shutdown/update/reboot" --search-query "$list4" --start-at "$patchdate $patchtime4"
done <"$file4"
# BAM server startup
patchtime5=$(date -d "$patchtime today - 15 minutes" +'%H:%M')
echo "$patchtime5"
file5="servers/prd-b-servers-bam-autoreboot"
while IFS= read -r list5
do
# display $line or do somthing with $line
printf '%s\n' "$list5"
hammer job-invocation create --description-format "Prd-b patching: bam server (prd-b) application startup - done after reboot" --job-template "Patching: Bam server (QA/UAT/PRD) application startup - Done after reboot" --search-query "$list5" --start-at "$patchdate $patchtime5"
done <"$file5"