自动部署到 F5 负载平衡环境

本文介绍了自动部署到 F5 负载平衡环境的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我们目前正在使用 TeamCity 进行 CI 构建，并且我们也在尝试设置自动化部署.

We are currently using TeamCity for CI builds and we are trying to set up automated deployments as well.

我目前尝试部署的项目是位于 F5 负载平衡器下的 Windows 服务.将来，我们还希望自动部署同样位于 F5 下的 IIS 网站.

The project I'm currently trying to deploy is a Windows service that sits under an F5 load balancer. In the future we would also like to automate the deployment of our IIS websites which also sit under the F5.

从 TeamCity，我们可以执行 PowerShell 脚本以在所需服务器上卸载 Windows 服务，将我们的文件推送到它，然后重新安装该服务.

From TeamCity we can execute PowerShell scripts to unistall the windows service on the desired server, push our files to it, then reinstall the service.

但是，我无法弄清楚如何处理负载平衡器.我们希望一次禁用 1 个节点，观察所有连接断开，然后部署我们的代码并重新启动节点.

However, I'm having trouble figuring out how to deal with the load balancer. We would want to disable 1 node at a time, watch for all the connections to drop, then deploy our code and bring the node back up.

这似乎是一个非常普遍的问题，但我发现关于如何做到这一点的信息非常少.

This seems like it would be a very common issue, but I'm finding surprisingly little information about how to do it.

谢谢！

已回答

感谢 Jonathon Rossi 提供 iControl Powershell cmdlet！

Thanks Jonathon Rossi for the iControl Powershell cmdlets!

为了其他用户的利益，这里是一个关闭、监控连接断开、推送代码，然后通过 powershell 脚本重新打开 F5 负载均衡器的示例

For other users' sakes, here is a sample of shutting down, monitoring for connections to drop, pushing code, and then turning back on the F5 load balancer through a powershell script

要使这些脚本正常工作，您首先必须通过以下答案中提供的链接安装 F5 iControl cmdlet

For these scripts to work you will first have to install the F5 iControl cmdlets from the links provided in the Answer below

#PULL IN OUR F5 UTILITY FUNCTIONS
. .F5Functions.ps1


#DEFINE LOGIC TO DEPLOY CODE TO A NODE THAT HAS ALREADY BEEN REMOVED FROM THE LOAD BALANCER
function Deploy(
    [F5Node]$Node
)
{
    Write-Host "Deploying To: "$Node.Name
    #TODO: Remotely shut down services, push code, start back up services
}


#DEFINE NODES
$nodes = @()
$nodes += New-Object F5Node -ArgumentList @("TestNode1", "1.1.1.1")
$nodes += New-Object F5Node -ArgumentList @("TestNode2", "1.1.1.2")

#DEPLOY
DeployToNodes -Nodes $nodes -F5Host $F5Host -F5UserName $F5UserName -F5Password $F5Password

这是可重复使用的 F5Functions 脚本

And here is the reusable F5Functions script

#Load the F5 powershell iControl snapin
Add-PSSnapin iControlSnapin;

Write-Host "Imported F5 function!!!"

Add-Type @'
    public class F5Node
    {
        public F5Node(string name, string address){
            Address = address;
            Name = name;
        }
        public string Address {get;set;}
        public string Name {get;set;}
        public string QualifiedName {get{return "/Common/" + Name;}}
    }
'@

function DeployToNodes(
    [string]$F5Host = $(throw "Missing Required Parameter"),
    [string]$F5UserName = $(throw "Missing Required Parameter"),
    [string]$F5Password = $(throw "Missing Required Parameter"),
    [F5Node[]]$Nodes = $(throw "Missing Required Parameter"),
    [int]$MaxWaitTime = 300 #seconds... defaults to 5 minutes
){
    Authenticate -F5Host $F5Host -F5UserName $F5UserName -F5Password $F5Password

    foreach($node in $Nodes){
        DisableNode -Node $node

        WaitForConnectionsToDrop -Node $node -MaxWaitTime $MaxWaitTime

        #Assume the Script that included this script defined a Deploy Method with a Node param
        Deploy -Node $node

        EnableNode -Node $node
    }
}

function Authenticate(
    [string]$F5Host = $(throw "Missing Required Parameter"),
    [string]$F5UserName = $(throw "Missing Required Parameter"),
    [string]$F5Password = $(throw "Missing Required Parameter")
)
{
    Write-Host "Authenticating to F5..."
    Initialize-F5.iControl -HostName $F5Host -Username $F5UserName -Password $F5Password
    Write-Host "Authentication Success!!!"
}

function ParseStatistic(
        [iControl.CommonStatistic[]]$StatsCollection = $(throw "Missing Required Parameter"),
        [string]$StatName = $(throw "Missing Required Parameter")
    )
{
    for($i=0; $i -lt $StatsCollection.Count; $i++){
        if($StatsCollection[$i].type.ToString() -eq $StatName){
            return $StatsCollection[$i].value.low
            break
        }
    }
}

function GetStats(
        [F5Node]$Node = $(throw "Missing Required Parameter")
    )
{
    $arr = @($Node.QualifiedName)
    $nodeStats = (Get-F5.iControl).LocalLBNodeAddressV2.get_statistics($arr)
    return $nodeStats.statistics.statistics

    #foreach($memberStats in $poolStats.statistics){
    #    if($memberStats.member.address.ToString() -eq $Node -and $memberStats.member.port -eq $Port){
    #        return $memberStats.statistics
    #    }
    #}
}

function GetStatistic(
        [F5Node]$Node = $(throw "Missing Required Parameter"),
        [string]$StatName = $(throw "Missing Required Parameter")
    )
{
    $stats = GetStats -Node $Node
    $stat = ParseStatistic -StatsCollection $stats -StatName $StatName

    return $stat
}

function DisableNode(
    [F5Node]$Node = $(throw "Missing Required Parameter")
)
{
    Disable-F5.LTMNodeAddress -Node $Node.Address
    Write-Host "Disabled Node '$Node'"
}

function EnableNode(
    [F5Node]$Node = $(throw "Missing Required Parameter")
)
{
    Enable-F5.LTMNodeAddress -Node $Node.Address
    Write-Host "Enabled Node '$Node'"
}

function WaitForConnectionsToDrop(
    [F5Node]$Node = $(throw "Missing Required Parameter"),
    [int]$MaxWaitTime = 300
)
{
    $connections = GetCurrentConnections -Node $Node

    $elapsed = [System.Diagnostics.Stopwatch]::StartNew();
    while($connections -gt 0 -and $elapsed.ElapsedMilliseconds -lt ($MaxWaitTime * 1000)){

        Start-Sleep -Seconds 10

        $connections = GetCurrentConnections -Node $Node
    }
}

function GetCurrentConnections(
    [F5Node]$Node = $(throw "Missing Required Parameter")
)
{
    $connections = GetStatistic -Node $Node -StatName "STATISTIC_SERVER_SIDE_CURRENT_CONNECTIONS"
    $name = $Node.Name + ":" + $Node.Address
    Write-Host "$connections connections remaining on '$name'"
    return $connections
}

Balancer

自动部署到 F5 负载平衡环境

问题描述

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