-refactor Apache demo completely

-bug fix in SystemD (json) demo
-Move demos to self-contained folders

demos/Apache/Apache/Apache.psm1

@@ -0,0 +1,161 @@
+
+#Region utility functions
+Function GetApacheCmd{
+    if (Test-Path "/usr/sbin/apache2ctl"){
+        $cmd = "/usr/sbin/apache2ctl"
+    }elseif(Test-Path "/usr/sbin/httpd"){
+        $cmd = "/usr/sbin/httpd"
+    }else{
+        Write-Error "Unable to find httpd or apache2ctl program. Unable to continue"
+        exit -1
+    }
+    $cmd
+}
+
+Function GetApacheVHostDir{
+    if (Test-Path "/etc/httpd/conf.d"){
+        $VHostsDirectory = "/etc/httpd/conf.d/"
+    }
+    if (Test-Path "/etc/apache2/sites-enabled"){
+        $VHostsDirectory = "/etc/apache2/sites-enabled"
+    }else{
+        $VHostsDirectory = $null
+    }
+    $VHostsDirectory
+}
+
+Function CleanInputString([string]$inputStr){
+    $outputStr = $inputStr.Trim().Replace('`n','').Replace('\n','')
+    $outputStr
+}
+
+#EndRegion utilty functions
+
+#Region Class specifications
+
+
+Class ApacheVirtualHost{
+        [string]$ServerName
+        [string]$DocumentRoot
+        [string]$VirtualHostIPAddress = "*"
+        [string[]]$ServerAliases
+        [string]$VirtualHostPort = "80"
+        [string]$ServerAdmin
+        [string]$CustomLogPath
+        [string]$ErrorLogPath   
+        [string]$ConfigurationFile
+
+        #region class constructors
+        #endregion
+
+        #region class methods
+        Save($ConfigurationFile){
+            if (!(Test-Path $this.DocumentRoot)){ New-Item -type Directory $this.DocumentRoot }
+
+            $VHostsDirectory = GetApacheVHostDir
+            if (!(Test-Path $VHostsDirectory)){
+                Write-Error "Specified virtual hosts directory does not exist: $VHostsDirectory"
+                exit 1
+            }
+            $vHostDef = "<VirtualHost $this.VirtualHostIPAddress:$this.VirtualHostPort >`n"
+            $vHostDef += "DocumentRoot " + $this.DocumentRoot + "`n"
+            ForEach ($Alias in $this.ServerAliases){
+                $vHostDef += "ServerAlias " + $Alias + "`n"
+            }
+            if ($this.ServerAdmin.Length -gt 1){$vHostDef += "ServerAdmin " + $this.ServerAdmin +"`n"}
+            if ($this.CustomLogPath -like "*/*"){$vHostDef += "CustomLog " + $this.CustomLogPath +"`n"}
+            if ($this.ErrorLogPath -like "*/*"){$vHostDef += "ErrorLog " + $this.ErrorLogpath +"`n"}
+            $vHostDef += "</VirtualHost>"
+            $filName = $ConfigurationFile
+            $VhostDef |out-file "${VHostsDirectory}/${filName}" -Force -Encoding:ascii
+            Write-Information "Restarting Apache HTTP Server"
+            Restart-ApacheHTTPServer
+        }
+
+        #endregion
+}
+
+#EndRegion Class Specifications
+
+Function New-ApacheVHost {
+    [CmdletBinding()]
+    param (
+        [parameter (Mandatory = $true)][string]$ServerName,
+        [parameter (Mandatory = $true)][string]$DocumentRoot,
+        [string]$VirtualHostIPAddress,
+        [string[]]$ServerAliases,
+        [string]$VirtualHostPort,
+        [string]$ServerAdmin,
+        [string]$CustomLogPath,
+        [string]$ErrorLogPath
+        )
+
+        $newVHost = [ApacheVirtualHost]::new()
+        $newVHost.ServerName = $ServerName
+        $newVHost.DocumentRoot = $DocumentRoot
+        $newVHost.ServerAliases = $ServerAliases
+        if ($VirtualHostIPAddress){$newVHost.VirtualHostIPAddress = $VirtualHostIPAddress}
+        if ($VirtualHostPort){$newVHost.VirtualHostPort = $VirtualHostPort}
+        $newVHost.ServerAdmin = $ServerAdmin
+        $newVHost.CustomLogPath = $CustomLogPath
+        $newVHost.ErrorLogPath = $ErrorLogPath
+        $newVHost.Save("$ServerName.conf")        
+}
+
+Function Get-ApacheVHost{
+    $cmd = GetApacheCmd
+   
+    $Vhosts = @()
+    $res = & $cmd -t -D DUMP_VHOSTS
+
+    ForEach ($line in $res){
+        $ServerName = $null
+        if ($line -like "*:*.conf*"){
+            #$vhobject = New-VHostObj
+            $RMatch = $line -match "(?<Listen>.*:[0-9]*)(?<ServerName>.*)\((?<ConfFile>.*)\)"
+            $ListenAddress = $Matches.Listen.trim()
+            $ServerName = $Matches.ServerName.trim()
+            $ConfFile = $Matches.ConfFile.trim()
+        }else{
+            if ($line.trim().split()[0] -like "*:*"){
+                $ListenAddress = $line.trim().split()[0]
+            }elseif($line -like "*.conf*"){
+                if ($line -like "*default*"){
+                    $ServerName = "_Default"
+                    $ConfFile = $line.trim().split()[3].split(":")[0].Replace('(','')
+                }elseif($line -like "*namevhost*"){
+                    $ServerName = $line.trim().split()[3]
+                    $ConfFile = $line.trim().split()[4].split(":")[0].Replace('(','')
+                }
+            }
+        }
+
+        if ($ServerName -ne $null){
+            $vHost = [ApacheVirtualHost]::New
+            $vHost.ServerName = $ServerName
+            $vHost.ConfFile = $ConfFile
+            $vHost.VirtualHostIPAddress = $ListenAddress.Split(":")[0]
+            $vHost.VirtualHostPort = $ListenAddress.Split(":")[1]
+            $Vhosts += $vHost
+            }
+        }
+    Return $Vhosts
+    }
+
+Function Restart-ApacheHTTPServer{
+  [CmdletBinding()]
+  Param(
+   [switch]$Graceful
+   )
+  
+    if ($Graceful -eq $null){$Graceful = $fase}
+    $cmd = GetApacheCmd
+	if ($Graceful){
+		& $cmd  -k graceful
+	}else{
+		& $cmd  -k restart
+	}
+
+}
+
+

demos/Apache/apache-demo.ps1

@@ -0,0 +1,16 @@
+ipmo Apache
+
+#list Apache Modules
+Get-ApacheModules |Where {$_.Module -like "*proxy*"}|Sort-Object Module
+
+#Graceful restart of Apache
+Restart-ApacheHTTPServer -graceful
+
+#Enumerate current virtual hosts (web sites)
+Get-ApacheVHost
+
+#Add a new virtual host
+New-ApacheVHost -ServerName "mytestserver" -DocumentRoot /var/www/html/mystestserver -VirtualHostIPAddress * -VirtualHostPort 8090
+
+#Enumerate new set of virtual hosts
+Get-ApacheVHost

demos/SystemD/SystemD/SystemD.psm1

@@ -0,0 +1,17 @@
+Function Get-SystemDJournal {
+    [CmdletBinding()]
+    param (
+        [Alias("args")][string]$journalctlParameters
+       )
+        $cmd = "journalctl"
+        $Result = & $cmd $journalctlParameters -o json --no-pager
+        Try
+        {
+                  $JSONResult = $Result|ConvertFrom-JSON
+                  $JSONResult
+        }
+        Catch
+        {
+                $Result
+        }
+}

demos/SystemD/journalctl-demo.ps1

@@ -0,0 +1,6 @@
+
+#list recent journal events
+Get-SystemDJournal -args "-xe"
+
+#Drill into SystemD unit messages
+Get-SystemDJournal -args "-xe" |where {$_._SYSTEMD_UNIT -like "*.service"} |ft _SYSTEMD_UNIT, MESSAGE |select-object -first 10

demos/SystemD/readme.md

@@ -0,0 +1,4 @@
+#Journalctl (JSON parsing) demo
+Requires:
+-SystemD-based system (RHEL/CentOS 7, Ubuntu 16.04)
+-Privileges (launch powershell with sudo)

demos/modules/ApacheHTTPServer/ApacheVirtualHosts.psm1

@@ -1,173 +0,0 @@
-$moduleRoot = Split-Path -Path $MyInvocation.MyCommand.Path
-
-
-Function New-ApacheVHost {
-    [CmdletBinding()]
-    param (
-        [parameter (Mandatory = $true)][string]$ServerName,
-        [string]$VHostsDirectory,
-        [parameter (Mandatory = $true)][string]$DocumentRoot,
-         [parameter (Mandatory = $true)][string]$VirtualHostIPAddress,
-        [string[]]$ServerAliases,
-         [parameter (Mandatory = $true)][string]$VirtualHostPort,
-        [string]$ServerAdmin,
-        [string]$CustomLogPath,
-        [string]$ErrorLogPath
-        )
-
-        if ($VHostsDirectory -notlike "*/*"){
-            #Try to find default
-            if (Test-Path "/etc/httpd/conf.d"){
-                $VHostsDirectory = "/etc/httpd/conf.d/"
-            }
-            if (Test-Path "/etc/apache2/sites-enabled"){
-                $VHostsDirectory = "/etc/apache2/sites-enabled"
-            }
-        }
-
-        if (!(Test-Path $VHostsDirectory)){
-            Write-Error "Specified virtual hosts directory does not exist: $VHostsDirectory"
-            exit 1
-        }
-
-        $vHostDef = "<VirtualHost " 
-        if ($VirtualHostIPAddress -ne $null){
-            $vHostDef += $VirtualHostIPAddress
-        }
-        if ($VirtualHostPort -ne $null){
-            $vHostDef += ":$VirtualHostPort"
-        }
-        $vHostDef += ">"
-
-        $vHostDef += "`n"
-        $vHostDef += "DocumentRoot " + $DocumentRoot + "`n"
-        $vHostDef += "ServerName " + $ServerName + "`n"
-        if ($ServerAliases -ne $null){
-            ForEach ($Alias in $ServerAliases){
-                $vHostDef += "ServerAlias " + $Alias + "`n"
-            }
-        }
-        if ($ServerAdmin.Length -gt 1){
-            $vHostDef += "ServerAdmin " + $ServerAdmin +"`n"
-        }
-        if ($CustomLogPath -like "*/*"){
-            $vHostDef += "CustomLog " + $CustomLogPath +"`n"
-        }
-        if ($ErrorLogPath -like "*/*"){
-            $vHostDef += "ErrorLog " + $ErrorLogpath +"`n"
-        }
-        $vHostDef += "</VirtualHost>"
-        $filName = $ServerName + ".conf"
-        Write-Output "Writing $filName to $VHostsDirectory"
-        $VhostDef |out-file "$VHostsDirectory/$filName" -Force -Encoding:ascii
-        
-        if (Test-Path "/usr/sbin/apache2ctl"){
-            $cmd = "/usr/sbin/apache2ctl"
-        }elseif(Test-Path "/usr/sbin/httpd"){
-            $cmd = "/usr/sbin/httpd"
-        }
-        $cmd += " -k restart"
-        write-output "Restarting Apache HTTP daemon"
-        Invoke-expression $cmd
-}
-
-Function Get-ApacheVHosts{
-    $cmd = $null
-    if (Test-Path "/usr/sbin/apache2ctl"){
-        $cmd = "/usr/sbin/apache2ctl"
-    }elseif(Test-Path "/usr/sbin/httpd"){
-        $cmd = "/usr/sbin/httpd"
-    }
-
-
-    function New-VHostObj {
-        New-Object PSObject -Property @{}
-    }
-
-
-
-    if ($cmd -eq $null){
-        Write-Error "Unable to find httpd/apache2ctl command"
-        exit -1
-    }
-
-    $cmd  = $cmd += " -t -D DUMP_VHOSTS"
-    $Vhosts = @()
-    $res = Invoke-expression $cmd
-    ForEach ($line in $res){         
-        if ($line -like "*.conf*"){
-           $vhobject = New-VHostObj
-           $RMatch = $line -match "(?<Listen>.*:[0-9]*)(?<ServerName>.*)\((?<ConfFile>.*)\)"
-           $VHostProps = $matches
-           $vhobject |Add-Member -type NoteProperty -name "ServerName" -value $matches.ServerName.Trim()
-           $vhobject |Add-Member -type NoteProperty -name "ListenAddress" -value $matches.Listen.Trim()
-           $vhobject |Add-Member -type NoteProperty -name "ConfFile" -value $matches.ConfFile.Trim()
-           $Vhosts += $vhobject
-        }
-    
-    }
-   
-    Return $Vhosts
-
-}
-
-Function Restart-ApacheHTTPServer{
-  [CmdletBinding()]
-  Param(
-   [boolean]$Graceful
-   )
-  
-    if ($Graceful -eq $null){$Graceful = $fase}
-	
-    $cmd = $null
-    if (Test-Path "/usr/sbin/apache2ctl"){
-        $cmd = "/usr/sbin/apache2ctl"
-    }elseif(Test-Path "/usr/sbin/httpd"){
-        $cmd = "/usr/sbin/httpd"
-    }
-	
-	if ($cmd -eq $null){
-        Write-Error "Unable to find httpd/apache2ctl command"
-        exit -1
-    }
-	
-	if ($Graceful){
-		$cmd = $cmd += " -k graceful"
-	}else{
-		$cmd = $cmd += " -k restart"
-	}
-	
-	Invoke-Expression $Cmd
-}
-
-Function Get-ApacheModules{
-    $cmd = $null
-    if (Test-Path "/usr/sbin/apache2ctl"){
-        $cmd = "/usr/sbin/apache2ctl"
-    }elseif(Test-Path "/usr/sbin/httpd"){
-        $cmd = "/usr/sbin/httpd"
-    }
-	
-	if ($cmd -eq $null){
-        Write-Error "Unable to find httpd/apache2ctl command"
-        exit -1
-    }
-	
-	$cmd = $cmd += " -M |grep -v Loaded"
-	
-	$ApacheModules = @()
-	function New-ModuleObj {
-        New-Object PSObject -Property @{}
-    }
-
-
-	$Results = Invoke-Expression $cmd
-	Foreach ($mod in $Results){
-	  $modObj = New-ModuleObj
-	  $modObj | Add-Member -type NoteProperty -name "Module" -value $mod.trim()
-	  $ApacheModules += $modObj
-	} 
-
-	Return $ApacheModules
-	
-}