/// <summary>
/// To push logs in Log Analytics Workspace
/// </summary>
/// <param name="json"></param>
/// <param name="workspaceId"></param>
/// <param name="sharedKey"></param>
/// <param name="log"></param>
/// <returns></returns>
public static async Task <bool> PushLogsToLogAnalytics(string json, string logFileName, string workspaceId, string sharedKey, ILogger log)
{
try
{
// Create a hash for the API signature
var datestring = DateTime.UtcNow.ToString("r");
var jsonBytes = Encoding.UTF8.GetBytes(json);
string stringToHash = "POST\n" + jsonBytes.Length + "\napplication/json\n" + "x-ms-date:" + datestring + "\n/api/logs";
string hashedString = LogAnalyticsHelper.BuildSignature(stringToHash, sharedKey, log);
log.LogInformation($"HashedString : {hashedString}");
string signature = "SharedKey " + workspaceId + ":" + hashedString;
log.LogInformation($"Signature : " + signature);
bool ingestionStatus = await LogAnalyticsHelper.IngestToLogAnalytics(signature, datestring, json, logFileName, workspaceId, log);
return(ingestionStatus);
}
catch (Exception e)
{
log.LogInformation($"PushLogsToLogAnalytics got Exception \n Time: {DateTime.Now} \n Exception{e.Message} and complete Exception:{e}");
return(false);
}
}
public static async Task <HttpResponseMessage> Run(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequestMessage req,
ILogger log)
{
try
{
log.LogInformation("PushLogsToLogAnalytics Function Called");
//Get Request Data
dynamic data = await req.Content.ReadAsAsync <object>();
string customLogFile = data.LogFileName;
string automationName = data.AutomationName;
string moduleName = data.ModuleName;
string logData = Convert.ToString(data.LogData);
//Parsing provided logData Json
JObject logDataObj = JObject.Parse(logData);
string logDataJson = logDataObj.ToString(Newtonsoft.Json.Formatting.Indented);
//Preparing Final Json for Log Analytics Injection
dynamic obj = new JObject();
obj.AutomationName = automationName;
obj.ModuleName = moduleName;
obj.Log = logDataJson;
string myJson = obj.ToString(Newtonsoft.Json.Formatting.Indented);
log.LogInformation("PreparedFinalJson : " + myJson);
//Validating Json - User provided Log Data Json and prepared final Json
bool isChildJsonValid = LogAnalyticsHelper.IsValidJson(logDataJson, log);
bool isParentJsonValid = LogAnalyticsHelper.IsValidJson(myJson, log);
if (isChildJsonValid && isParentJsonValid)
{
log.LogInformation("Fetching details from KeyVault");
log.LogInformation("Invoking FetchKeyVaultSecret method");
string workspaceId = await KeyVaultHelper.FetchKeyVaultSecret(ConstantsHelper.GetEnvironmentVariable(ConstantsHelper.logAnalyticsWorkspaceID), log);
string primaryKey = await KeyVaultHelper.FetchKeyVaultSecret(ConstantsHelper.GetEnvironmentVariable(ConstantsHelper.logAnalyticsWorkspaceSharedKey), log);
log.LogInformation("FetchKeyVaultSecret executed successfully");
//Invoking PushLogsToLogAnalytics method to ingest the logs into workspace
bool status = await LogAnalyticsHelper.PushLogsToLogAnalytics(myJson, customLogFile, workspaceId, primaryKey, log);
if (status)
{
log.LogInformation("Ingestion of log analytics is completed.");
return(req.CreateResponse(HttpStatusCode.OK, "[Info] Ingestion of log analytics is completed."));
}
else
{
log.LogInformation("Ingestion of log analytics is failed");
return(req.CreateResponse(HttpStatusCode.BadRequest, "[Error] Ingestion of log analytics is failed"));
}
}
else
{
return(req.CreateResponse(HttpStatusCode.BadRequest, $"[Warning] Invalid Json Provided"));
}
}
catch (System.Exception ex)
{
return(req.CreateResponse(HttpStatusCode.NotFound, $"{ex.Message}"));
}
}
