{"id":3173,"date":"2017-03-05T15:39:27","date_gmt":"2017-03-05T11:39:27","guid":{"rendered":"https:\/\/rakhesh.com\/?p=3173"},"modified":"2017-03-05T15:43:41","modified_gmt":"2017-03-05T11:43:41","slug":"reboot-a-bunch-of-esxi-hosts-one-after-the-other","status":"publish","type":"post","link":"https:\/\/rakhesh.com\/powershell\/reboot-a-bunch-of-esxi-hosts-one-after-the-other\/","title":{"rendered":"Reboot a bunch of ESXi hosts one after the other"},"content":{"rendered":"

Not a big deal, I know, but I felt like posting this. :)<\/p>\n

\"\"<\/p>\n

Our HP Gen8 ESXi hosts were randomly crashing ever since we applied the latest ESXi 5.5 updates to them in December. Logged a call with HP and turns out until a proper fix is issued by VMware\/ HPE we need to change a setting on all our hosts<\/a> and reboot them. I didn’t want to do it manually, so I used PowerCLI to do it en masse.<\/p>\n

Here’s the script I wrote to target Gen8 hosts and make the change:<\/p>\n

$Hosts = Get-Cluster | Get-VMHost | ?{ $_.Model -match \"Gen8$\" }\r\nforeach ($VMHost in $Hosts) {\r\n  Write-Host \"$VMHost\"\r\n  $ESXCli = Get-ESXCli -VMHost $VMHost \r\n  if (($ESXCli.system.settings.kernel.list() | ?{ $_.Name -eq \"iovDisableIR\" }).Configured -eq \"TRUE\") { $ESXCli.system.settings.kernel.set(\"iovDisableIR\", \"FALSE\") }\r\n}<\/pre>\n
I could have done the reboot along with this, but I didn’t want to. Instead I copy pasted the list of affected hosts into a text file (called ESXReboot.txt<\/code> in the script below) and wrote another script to put them into maintenance mode and reboot one by one.<\/p>\n
Get-Content .\\ESXReboot.txt | %{ \r\n    $Server = $_;\r\n    Write-Host -ForegroundColor Green \"$Server\"\r\n    Write-Host -ForegroundColor Yellow \"`tEntering maintenance mode\"\r\n    Set-VMHost $Server -State maintenance -Evacuate | Out-Null\r\n\r\n    Write-Host -ForegroundColor Yellow -NoNewline \"`tRebooting\"\r\n    Restart-VMHost $Server -Confirm:$false  | Out-Null\r\n\r\n    do {\r\n        sleep 15\r\n        $ServerState = (Get-VMHost $Server).ConnectionState\r\n        Write-Host -ForegroundColor Yellow -NoNewline \".\"\r\n    } while ($ServerState -ne \"NotResponding\")\r\n    Write-Host -ForegroundColor Yellow -NoNewline \"(down)\"\r\n\r\n    do {\r\n        sleep 30\r\n        $ServerState = (Get-VMHost $Server).ConnectionState\r\n        Write-Host -ForegroundColor Yellow -NoNewline \"`.\"\r\n    } while ($ServerState -ne \"Maintenance\")\r\n    Write-Host -ForegroundColor Yellow \"(up)\"\r\n\r\n    Write-Host -ForegroundColor Yellow \"`tExiting maintenance mode\"\r\n    Set-VMHost $Server -State Connected  | Out-Null\r\n    Write-Host -ForegroundColor Yellow \"`tDone!\"\r\n    Write-Host \"\"\r\n}<\/pre>\n
The screenshot output is slightly different from what you would get from the script as I modified it a bit since taking the screenshot. Functionality-wise there’s no change.<\/p>\n","protected":false},"excerpt":{"rendered":"
Not a big deal, I know, but I felt like posting this. :) Our HP Gen8 ESXi hosts were randomly crashing ever since we applied the latest ESXi 5.5 updates to them in December. Logged a call with HP and turns out until a proper fix is issued by VMware\/ HPE we need to change … Continue reading Reboot a bunch of ESXi hosts one after the other<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[2,183],"tags":[526,527,524,184],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/posts\/3173"}],"collection":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/comments?post=3173"}],"version-history":[{"count":0,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/posts\/3173\/revisions"}],"wp:attachment":[{"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/media?parent=3173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/categories?post=3173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rakhesh.com\/wp-json\/wp\/v2\/tags?post=3173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}