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JobExtension.cs
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JobExtension.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.Threading.Tasks;
using GitHub.DistributedTask.Expressions2;
using GitHub.DistributedTask.ObjectTemplating.Tokens;
using GitHub.DistributedTask.Pipelines.ContextData;
using GitHub.DistributedTask.Pipelines.ObjectTemplating;
using GitHub.DistributedTask.WebApi;
using GitHub.Runner.Common;
using GitHub.Runner.Common.Util;
using GitHub.Runner.Sdk;
using Pipelines = GitHub.DistributedTask.Pipelines;
namespace GitHub.Runner.Worker
{
[DataContract]
public class SetupInfo
{
[DataMember]
public string Group { get; set; }
[DataMember]
public string Detail { get; set; }
}
[ServiceLocator(Default = typeof(JobExtension))]
public interface IJobExtension : IRunnerService
{
Task<List<IStep>> InitializeJob(IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message);
void FinalizeJob(IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message, DateTime jobStartTimeUtc);
}
public sealed class JobExtension : RunnerService, IJobExtension
{
private readonly HashSet<string> _existingProcesses = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
private bool _processCleanup;
private string _processLookupId = $"github_{Guid.NewGuid()}";
// Download all required actions.
// Make sure all condition inputs are valid.
// Build up three list of steps for jobrunner (pre-job, job, post-job).
public async Task<List<IStep>> InitializeJob(IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message)
{
Trace.Entering();
ArgUtil.NotNull(jobContext, nameof(jobContext));
ArgUtil.NotNull(message, nameof(message));
// Create a new timeline record for 'Set up job'
IExecutionContext context = jobContext.CreateChild(Guid.NewGuid(), "Set up job", $"{nameof(JobExtension)}_Init", null, null);
List<IStep> preJobSteps = new List<IStep>();
List<IStep> jobSteps = new List<IStep>();
using (var register = jobContext.CancellationToken.Register(() => { context.CancelToken(); }))
{
try
{
context.Start();
context.Debug($"Starting: Set up job");
context.Output($"Current runner version: '{BuildConstants.RunnerPackage.Version}'");
var setupInfoFile = HostContext.GetConfigFile(WellKnownConfigFile.SetupInfo);
if (File.Exists(setupInfoFile))
{
Trace.Info($"Load machine setup info from {setupInfoFile}");
try
{
var setupInfo = IOUtil.LoadObject<List<SetupInfo>>(setupInfoFile);
if (setupInfo?.Count > 0)
{
foreach (var info in setupInfo)
{
if (!string.IsNullOrEmpty(info?.Detail))
{
var groupName = info.Group;
if (string.IsNullOrEmpty(groupName))
{
groupName = "Machine Setup Info";
}
context.Output($"##[group]{groupName}");
var multiLines = info.Detail.Replace("\r\n", "\n").TrimEnd('\n').Split('\n');
foreach (var line in multiLines)
{
context.Output(line);
}
context.Output("##[endgroup]");
}
}
}
}
catch (Exception ex)
{
context.Output($"Fail to load and print machine setup info: {ex.Message}");
Trace.Error(ex);
}
}
var repoFullName = context.GetGitHubContext("repository");
ArgUtil.NotNull(repoFullName, nameof(repoFullName));
context.Debug($"Primary repository: {repoFullName}");
// Print proxy setting information for better diagnostic experience
if (!string.IsNullOrEmpty(HostContext.WebProxy.HttpProxyAddress))
{
context.Output($"Runner is running behind proxy server '{HostContext.WebProxy.HttpProxyAddress}' for all HTTP requests.");
}
if (!string.IsNullOrEmpty(HostContext.WebProxy.HttpsProxyAddress))
{
context.Output($"Runner is running behind proxy server '{HostContext.WebProxy.HttpsProxyAddress}' for all HTTPS requests.");
}
// Prepare the workflow directory
context.Output("Prepare workflow directory");
var directoryManager = HostContext.GetService<IPipelineDirectoryManager>();
TrackingConfig trackingConfig = directoryManager.PrepareDirectory(
context,
message.Workspace);
// Set the directory variables
context.Debug("Update context data");
string _workDirectory = HostContext.GetDirectory(WellKnownDirectory.Work);
context.SetRunnerContext("workspace", Path.Combine(_workDirectory, trackingConfig.PipelineDirectory));
context.SetGitHubContext("workspace", Path.Combine(_workDirectory, trackingConfig.WorkspaceDirectory));
// Temporary hack for GHES alpha
var configurationStore = HostContext.GetService<IConfigurationStore>();
var runnerSettings = configurationStore.GetSettings();
if (string.IsNullOrEmpty(context.GetGitHubContext("server_url")) && !runnerSettings.IsHostedServer && !string.IsNullOrEmpty(runnerSettings.GitHubUrl))
{
var url = new Uri(runnerSettings.GitHubUrl);
var portInfo = url.IsDefaultPort ? string.Empty : $":{url.Port.ToString(CultureInfo.InvariantCulture)}";
context.SetGitHubContext("server_url", $"{url.Scheme}://{url.Host}{portInfo}");
context.SetGitHubContext("api_url", $"{url.Scheme}://{url.Host}{portInfo}/api/v3");
context.SetGitHubContext("graphql_url", $"{url.Scheme}://{url.Host}{portInfo}/api/graphql");
}
// Evaluate the job-level environment variables
context.Debug("Evaluating job-level environment variables");
var templateEvaluator = context.ToPipelineTemplateEvaluator();
foreach (var token in message.EnvironmentVariables)
{
var environmentVariables = templateEvaluator.EvaluateStepEnvironment(token, jobContext.ExpressionValues, jobContext.ExpressionFunctions, VarUtil.EnvironmentVariableKeyComparer);
foreach (var pair in environmentVariables)
{
context.EnvironmentVariables[pair.Key] = pair.Value ?? string.Empty;
context.SetEnvContext(pair.Key, pair.Value ?? string.Empty);
}
}
// Evaluate the job container
context.Debug("Evaluating job container");
var container = templateEvaluator.EvaluateJobContainer(message.JobContainer, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
if (container != null)
{
jobContext.Container = new Container.ContainerInfo(HostContext, container);
}
// Evaluate the job service containers
context.Debug("Evaluating job service containers");
var serviceContainers = templateEvaluator.EvaluateJobServiceContainers(message.JobServiceContainers, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
if (serviceContainers?.Count > 0)
{
foreach (var pair in serviceContainers)
{
var networkAlias = pair.Key;
var serviceContainer = pair.Value;
jobContext.ServiceContainers.Add(new Container.ContainerInfo(HostContext, serviceContainer, false, networkAlias));
}
}
// Evaluate the job defaults
context.Debug("Evaluating job defaults");
foreach (var token in message.Defaults)
{
var defaults = token.AssertMapping("defaults");
if (defaults.Any(x => string.Equals(x.Key.AssertString("defaults key").Value, "run", StringComparison.OrdinalIgnoreCase)))
{
context.JobDefaults["run"] = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
var defaultsRun = defaults.First(x => string.Equals(x.Key.AssertString("defaults key").Value, "run", StringComparison.OrdinalIgnoreCase));
var jobDefaults = templateEvaluator.EvaluateJobDefaultsRun(defaultsRun.Value, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
foreach (var pair in jobDefaults)
{
if (!string.IsNullOrEmpty(pair.Value))
{
context.JobDefaults["run"][pair.Key] = pair.Value;
}
}
}
}
// Build up 2 lists of steps, pre-job, job
// Download actions not already in the cache
Trace.Info("Downloading actions");
var actionManager = HostContext.GetService<IActionManager>();
var prepareResult = await actionManager.PrepareActionsAsync(context, message.Steps);
preJobSteps.AddRange(prepareResult.ContainerSetupSteps);
// Add start-container steps, record and stop-container steps
if (jobContext.Container != null || jobContext.ServiceContainers.Count > 0)
{
var containerProvider = HostContext.GetService<IContainerOperationProvider>();
var containers = new List<Container.ContainerInfo>();
if (jobContext.Container != null)
{
containers.Add(jobContext.Container);
}
containers.AddRange(jobContext.ServiceContainers);
preJobSteps.Add(new JobExtensionRunner(runAsync: containerProvider.StartContainersAsync,
condition: $"{PipelineTemplateConstants.Success}()",
displayName: "Initialize containers",
data: (object)containers));
}
// Add action steps
foreach (var step in message.Steps)
{
if (step.Type == Pipelines.StepType.Action)
{
var action = step as Pipelines.ActionStep;
Trace.Info($"Adding {action.DisplayName}.");
var actionRunner = HostContext.CreateService<IActionRunner>();
actionRunner.Action = action;
actionRunner.Stage = ActionRunStage.Main;
actionRunner.Condition = step.Condition;
var contextData = new Pipelines.ContextData.DictionaryContextData();
if (message.ContextData?.Count > 0)
{
foreach (var pair in message.ContextData)
{
contextData[pair.Key] = pair.Value;
}
}
actionRunner.TryEvaluateDisplayName(contextData, context);
jobSteps.Add(actionRunner);
if (prepareResult.PreStepTracker.TryGetValue(step.Id, out var preStep))
{
Trace.Info($"Adding pre-{action.DisplayName}.");
preStep.TryEvaluateDisplayName(contextData, context);
preStep.DisplayName = $"Pre {preStep.DisplayName}";
preJobSteps.Add(preStep);
}
}
}
var intraActionStates = new Dictionary<Guid, Dictionary<string, string>>();
foreach (var preStep in prepareResult.PreStepTracker)
{
intraActionStates[preStep.Key] = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
}
// Create execution context for pre-job steps
foreach (var step in preJobSteps)
{
if (step is JobExtensionRunner)
{
JobExtensionRunner extensionStep = step as JobExtensionRunner;
ArgUtil.NotNull(extensionStep, extensionStep.DisplayName);
Guid stepId = Guid.NewGuid();
extensionStep.ExecutionContext = jobContext.CreateChild(stepId, extensionStep.DisplayName, null, null, stepId.ToString("N"));
}
else if (step is IActionRunner actionStep)
{
ArgUtil.NotNull(actionStep, step.DisplayName);
Guid stepId = Guid.NewGuid();
actionStep.ExecutionContext = jobContext.CreateChild(stepId, actionStep.DisplayName, stepId.ToString("N"), null, null, intraActionStates[actionStep.Action.Id]);
}
}
// Create execution context for job steps
foreach (var step in jobSteps)
{
if (step is IActionRunner actionStep)
{
ArgUtil.NotNull(actionStep, step.DisplayName);
intraActionStates.TryGetValue(actionStep.Action.Id, out var intraActionState);
actionStep.ExecutionContext = jobContext.CreateChild(actionStep.Action.Id, actionStep.DisplayName, actionStep.Action.Name, actionStep.Action.ScopeName, actionStep.Action.ContextName, intraActionState);
}
}
List<IStep> steps = new List<IStep>();
steps.AddRange(preJobSteps);
steps.AddRange(jobSteps);
// Prepare for orphan process cleanup
_processCleanup = jobContext.Variables.GetBoolean("process.clean") ?? true;
if (_processCleanup)
{
// Set the RUNNER_TRACKING_ID env variable.
Environment.SetEnvironmentVariable(Constants.ProcessTrackingId, _processLookupId);
context.Debug("Collect running processes for tracking orphan processes.");
// Take a snapshot of current running processes
Dictionary<int, Process> processes = SnapshotProcesses();
foreach (var proc in processes)
{
// Pid_ProcessName
_existingProcesses.Add($"{proc.Key}_{proc.Value.ProcessName}");
}
}
return steps;
}
catch (OperationCanceledException ex) when (jobContext.CancellationToken.IsCancellationRequested)
{
// Log the exception and cancel the JobExtension Initialization.
Trace.Error($"Caught cancellation exception from JobExtension Initialization: {ex}");
context.Error(ex);
context.Result = TaskResult.Canceled;
throw;
}
catch (Exception ex)
{
// Log the error and fail the JobExtension Initialization.
Trace.Error($"Caught exception from JobExtension Initialization: {ex}");
context.Error(ex);
context.Result = TaskResult.Failed;
throw;
}
finally
{
context.Debug("Finishing: Set up job");
context.Complete();
}
}
}
public void FinalizeJob(IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message, DateTime jobStartTimeUtc)
{
Trace.Entering();
ArgUtil.NotNull(jobContext, nameof(jobContext));
// create a new timeline record node for 'Finalize job'
IExecutionContext context = jobContext.CreateChild(Guid.NewGuid(), "Complete job", $"{nameof(JobExtension)}_Final", null, null);
using (var register = jobContext.CancellationToken.Register(() => { context.CancelToken(); }))
{
try
{
context.Start();
context.Debug("Starting: Complete job");
// Evaluate job outputs
if (message.JobOutputs != null && message.JobOutputs.Type != TokenType.Null)
{
try
{
context.Output($"Evaluate and set job outputs");
// Populate env context for each step
Trace.Info("Initialize Env context for evaluating job outputs");
#if OS_WINDOWS
var envContext = new DictionaryContextData();
#else
var envContext = new CaseSensitiveDictionaryContextData();
#endif
context.ExpressionValues["env"] = envContext;
foreach (var pair in context.EnvironmentVariables)
{
envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
}
Trace.Info("Initialize steps context for evaluating job outputs");
context.ExpressionValues["steps"] = context.StepsContext.GetScope(context.ScopeName);
var templateEvaluator = context.ToPipelineTemplateEvaluator();
var outputs = templateEvaluator.EvaluateJobOutput(message.JobOutputs, context.ExpressionValues, context.ExpressionFunctions);
foreach (var output in outputs)
{
if (string.IsNullOrEmpty(output.Value))
{
context.Debug($"Skip output '{output.Key}' since it's empty");
continue;
}
if (!string.Equals(output.Value, HostContext.SecretMasker.MaskSecrets(output.Value)))
{
context.Warning($"Skip output '{output.Key}' since it may contain secret.");
continue;
}
context.Output($"Set output '{output.Key}'");
jobContext.JobOutputs[output.Key] = output.Value;
}
}
catch (Exception ex)
{
context.Result = TaskResult.Failed;
context.Error($"Fail to evaluate job outputs");
context.Error(ex);
jobContext.Result = TaskResultUtil.MergeTaskResults(jobContext.Result, TaskResult.Failed);
}
}
if (context.Variables.GetBoolean(Constants.Variables.Actions.RunnerDebug) ?? false)
{
Trace.Info("Support log upload starting.");
context.Output("Uploading runner diagnostic logs");
IDiagnosticLogManager diagnosticLogManager = HostContext.GetService<IDiagnosticLogManager>();
try
{
diagnosticLogManager.UploadDiagnosticLogs(executionContext: context, parentContext: jobContext, message: message, jobStartTimeUtc: jobStartTimeUtc);
Trace.Info("Support log upload complete.");
context.Output("Completed runner diagnostic log upload");
}
catch (Exception ex)
{
// Log the error but make sure we continue gracefully.
Trace.Info("Error uploading support logs.");
context.Output("Error uploading runner diagnostic logs");
Trace.Error(ex);
}
}
if (_processCleanup)
{
context.Output("Cleaning up orphan processes");
// Only check environment variable for any process that doesn't run before we invoke our process.
Dictionary<int, Process> currentProcesses = SnapshotProcesses();
foreach (var proc in currentProcesses)
{
if (proc.Key == Process.GetCurrentProcess().Id)
{
// skip for current process.
continue;
}
if (_existingProcesses.Contains($"{proc.Key}_{proc.Value.ProcessName}"))
{
Trace.Verbose($"Skip existing process. PID: {proc.Key} ({proc.Value.ProcessName})");
}
else
{
Trace.Info($"Inspecting process environment variables. PID: {proc.Key} ({proc.Value.ProcessName})");
string lookupId = null;
try
{
lookupId = proc.Value.GetEnvironmentVariable(HostContext, Constants.ProcessTrackingId);
}
catch (Exception ex)
{
Trace.Warning($"Ignore exception during read process environment variables: {ex.Message}");
Trace.Verbose(ex.ToString());
}
if (string.Equals(lookupId, _processLookupId, StringComparison.OrdinalIgnoreCase))
{
context.Output($"Terminate orphan process: pid ({proc.Key}) ({proc.Value.ProcessName})");
try
{
proc.Value.Kill();
}
catch (Exception ex)
{
Trace.Error("Catch exception during orphan process cleanup.");
Trace.Error(ex);
}
}
}
}
}
}
catch (Exception ex)
{
// Log and ignore the error from JobExtension finalization.
Trace.Error($"Caught exception from JobExtension finalization: {ex}");
context.Output(ex.Message);
}
finally
{
context.Debug("Finishing: Complete job");
context.Complete();
}
}
}
private Dictionary<int, Process> SnapshotProcesses()
{
Dictionary<int, Process> snapshot = new Dictionary<int, Process>();
foreach (var proc in Process.GetProcesses())
{
try
{
// On Windows, this will throw exception on error.
// On Linux, this will be NULL on error.
if (!string.IsNullOrEmpty(proc.ProcessName))
{
snapshot[proc.Id] = proc;
}
}
catch (Exception ex)
{
Trace.Verbose($"Ignore any exception during taking process snapshot of process pid={proc.Id}: '{ex.Message}'.");
}
}
Trace.Info($"Total accessible running process: {snapshot.Count}.");
return snapshot;
}
}
}