Private/Save-KubeSnapshot.ps1
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function Save-KubeSnapshot { param ( [string]$Namespace, [switch]$AllNamespaces, [switch]$AllNonSystemNamespaces, [string]$Labels, [string]$OutputPath, [switch]$DryRun, [string]$Objects # Accept comma-separated list of objects ) # Import the PowerShell-YAML module if not already loaded if (-not (Get-Module -ListAvailable -Name powershell-yaml)) { Import-Module powershell-yaml } # Function to run kubectl command and return output function Invoke-KubectlCommand { param ( [string]$command # kubectl command without the 'kubectl' part ) $processInfo = New-Object System.Diagnostics.ProcessStartInfo $processInfo.FileName = "kubectl" $processInfo.Arguments = $command $processInfo.RedirectStandardOutput = $true $processInfo.RedirectStandardError = $true $processInfo.UseShellExecute = $false $processInfo.CreateNoWindow = $true $process = New-Object System.Diagnostics.Process $process.StartInfo = $processInfo # Start the kubectl process $process.Start() | Out-Null # Capture output and error $output = $process.StandardOutput.ReadToEnd() $stderr = $process.StandardError.ReadToEnd() $process.WaitForExit() if ($stderr) { Write-Host "Error running kubectl command: $stderr" -ForegroundColor Red } return $output } # Define resource kinds $namespacedResources = @( "deployments", "daemonsets", "statefulsets", "configmaps", "secrets", "services", "ingresses", "persistentvolumeclaims", "horizontalpodautoscalers", "roles", "rolebindings", "serviceaccounts", "cronjobs", "jobs", "networkpolicies", "poddisruptionbudgets", "resourcequotas", "limitranges" ) $clusterScopedResources = @( "persistentvolumes", "clusterroles", "clusterrolebindings", "namespaces" ) # Command to capture all pods if no specific pod is provided $unmanagedPodsCmd = "get pods --output=json" # Set namespace option based on parameters if ($AllNamespaces) { $namespaceOption = "--all-namespaces" $unmanagedPodsCmd += " --all-namespaces" } elseif ($AllNonSystemNamespaces) { # Get all non-system namespaces $namespaces = Invoke-KubectlCommand "get namespaces -o json" | ConvertFrom-Json $nonSystemNamespaces = $namespaces.items | Where-Object { $_.metadata.name -notmatch "^(kube-system|kube-public|kube-node-lease|default)$" } | Select-Object -ExpandProperty metadata | Select-Object -ExpandProperty name } elseif ($Namespace) { # Check if the namespace exists $namespaceCheck = Invoke-KubectlCommand "get namespace $Namespace" 2>$null if (-not $namespaceCheck) { Write-Host "Namespace '$Namespace' does not exist in the cluster." -ForegroundColor Red return } $namespaceOption = "-n $Namespace" $unmanagedPodsCmd += " -n $Namespace" } else { $namespaceOption = "" } if ($Labels) { $labelOption = "-l $Labels" $unmanagedPodsCmd += " -l $Labels" } else { $labelOption = "" } if (-not $DryRun) { try { $resourcesFound = $false # Flag to track if any resources are found # Function to process resources in a namespace function Process-Namespace { param ( [string]$Namespace ) $namespaceOption = "-n $Namespace" $unmanagedPodsCmd = "get pods -n $Namespace --output=json" # If specific objects are provided, process them first if ($Objects) { $ObjectsArray = $Objects -split "," foreach ($object in $ObjectsArray) { $kind, $name = $object.Trim() -split "/" $kubectlCmd = "get $kind $name $namespaceOption -o yaml" Write-Verbose "Running command: kubectl $kubectlCmd" $resourceOutput = Invoke-KubectlCommand $kubectlCmd if ($resourceOutput) { $resourcesFound = $true # Resources found $resourceOutputYaml = $resourceOutput | ConvertFrom-Yaml $resourceName = $resourceOutputYaml.metadata.name $kind = $resourceOutputYaml.kind $timestamp = Get-Date -Format "yyyy-MM-dd_HH-mm-ss" # Sanitize the resourceName by replacing invalid characters with underscores $safeResourceName = $resourceName -replace "[:\\/]", "_" # Generate a filename based on the kind and name of the resource $resourceFile = Join-Path -Path $OutputPath -ChildPath "${kind}_${safeResourceName}_$timestamp.yaml" Write-Verbose "Saving $kind '$resourceName' snapshot to: $resourceFile" $resourceOutput | Out-File -FilePath $resourceFile -Force Write-Host "$kind '$resourceName' snapshot saved: $resourceFile" -ForegroundColor Green } } } else { # Capture namespaced resources foreach ($resource in $namespacedResources) { $kubectlCmd = "get $resource $namespaceOption $labelOption -o json" Write-Verbose "Running command: kubectl $kubectlCmd" $resourceOutput = Invoke-KubectlCommand $kubectlCmd # Skip if the resource does not exist (i.e., no items) if (-not $resourceOutput -or $resourceOutput -eq "null" -or $resourceOutput.Contains('"items": []')) { Write-Verbose "No $resource found in this namespace. Skipping." continue } $resourcesFound = $true # Resources found # Convert JSON to objects for easier processing $resourceOutputJson = $resourceOutput | ConvertFrom-Json # Process each individual item in the resource output foreach ($item in $resourceOutputJson.items) { $resourceName = $item.metadata.name $kind = $item.kind $timestamp = Get-Date -Format "yyyy-MM-dd_HH-mm-ss" # Sanitize the resourceName by replacing invalid characters with underscores $safeResourceName = $resourceName -replace "[:\\/]", "_" # Generate a filename based on the kind and name of the resource $resourceFile = Join-Path -Path $OutputPath -ChildPath "${kind}_${safeResourceName}_$timestamp.yaml" # Convert the item back to YAML and save it $item | ConvertTo-Yaml | Out-File -FilePath $resourceFile -Force Write-Verbose "Saving $kind '$resourceName' snapshot to: $resourceFile" Write-Host "$kind '$resourceName' snapshot saved: $resourceFile" -ForegroundColor Green } } # Capture unmanaged pods (those without ownerReferences) Write-Verbose "Running command for unmanaged pods: $unmanagedPodsCmd" $unmanagedPodsOutput = Invoke-KubectlCommand $unmanagedPodsCmd if ($unmanagedPodsOutput) { $resourcesFound = $true # Resources found $unmanagedPodsOutputJson = $unmanagedPodsOutput | ConvertFrom-Json foreach ($pod in $unmanagedPodsOutputJson.items) { if (-not $pod.metadata.ownerReferences) { $podName = $pod.metadata.name $timestamp = Get-Date -Format "yyyy-MM-dd_HH-mm-ss" $unmanagedPodFile = Join-Path -Path $OutputPath -ChildPath "unmanaged_pod_${podName}_$timestamp.yaml" $pod | ConvertTo-Yaml | Out-File -FilePath $unmanagedPodFile -Force Write-Verbose "Saving unmanaged pod '$podName' snapshot to: $unmanagedPodFile" Write-Host "Unmanaged pod '$podName' snapshot saved: $unmanagedPodFile" -ForegroundColor Green } } } } } # Process each namespace if ($AllNonSystemNamespaces) { foreach ($ns in $nonSystemNamespaces) { Write-Host "Processing namespace: $ns" Process-Namespace -Namespace $ns } } else { Process-Namespace -Namespace $Namespace } # Capture cluster-scoped resources if AllNamespaces is specified if ($AllNamespaces) { $clusterResourcesFound = $false # Track if any cluster-scoped resources are found foreach ($resource in $clusterScopedResources) { $kubectlCmd = "get $resource -o json" # No namespace option for cluster-scoped resources Write-Verbose "Running command: kubectl $kubectlCmd" $resourceOutput = Invoke-KubectlCommand $kubectlCmd # Skip if the resource does not exist (i.e., no items) if (-not $resourceOutput -or $resourceOutput -eq "null" -or $resourceOutput.Contains('"items": []')) { Write-Verbose "No $resource found. Skipping." continue } $clusterResourcesFound = $true # Resources found # Convert JSON to objects for easier processing $resourceOutputJson = $resourceOutput | ConvertFrom-Json # Process each individual item in the resource output foreach ($item in $resourceOutputJson.items) { $resourceName = $item.metadata.name $kind = $item.kind $timestamp = Get-Date -Format "yyyy-MM-dd_HH-mm-ss" # Sanitize the resourceName by replacing invalid characters with underscores $safeResourceName = $resourceName -replace "[:\\/]", "_" # Generate a filename based on the kind and name of the resource $resourceFile = Join-Path -Path $OutputPath -ChildPath "${kind}_${safeResourceName}_$timestamp.yaml" # Convert the item back to YAML and save it $item | ConvertTo-Yaml | Out-File -FilePath $resourceFile -Force Write-Verbose "Saving $kind '$resourceName' snapshot to: $resourceFile" Write-Host "$kind '$resourceName' snapshot saved: $resourceFile" -ForegroundColor Green } } # If no cluster-scoped resources were found if (-not $clusterResourcesFound) { Write-Host "No cluster-scoped resources found." -ForegroundColor Yellow } } # If no resources were found in the namespace if (-not $resourcesFound) { Write-Host "No resources found in the namespace '$Namespace'." -ForegroundColor Yellow } } catch { Write-Host "Error occurred while capturing the snapshot: $_" -ForegroundColor Red } } else { Write-Host "Dry run: No snapshot was taken." } } |