How do I test if an installed global package is working in Elastic Beanstalk running Linux Ubuntu

See also questions close to this topic

• Java process command result fail to capture result

  I have a java program it does execute the shell command then wait for command to exit from shell to get result. But Process unable to read the output from command it just print result empty.

  However same command if I run from shell prompt I could see result printing there..

  {

  [root@localhost home]# tsp -I marker input.mpg -P marker -a 10 -v 10 -O file output.mpg

  • marker: 10
  • marker: 20
  • marker: 30
  • marker: 40
  • marker: 50
  • marker: 60
  • marker: 70
  • marker: 80
  • marker: 90
  • marker: 100
  • marker: OK [root@localhost home]#

  }

  Java program to execute shell command here {

  import java.io.BufferedReader;
  import java.io.InputStreamReader;
  
  public class ExecuteShellComand {
  
  public static void main(String[] args) {
  
      ExecuteShellComand obj = new ExecuteShellComand();
  
      String command = "tsp -I olesmarker input.mpg -P " + "olesmarker -a 10 -v 10 -O file output.mpg";
  
      String output = obj.executeCommand(command);
  
      System.out.println("Command Result = " + output);
  
  }
  
  private String executeCommand(String command) {
      StringBuilder output = new StringBuilder();
      Process p;
      try {
          p = Runtime.getRuntime().exec(command);
          p.waitFor();
          BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
  
          String line = "";
          while ((line = reader.readLine()) != null) {
              output.append(line + "\n");
          }
  
      } catch (Exception e) {
          e.printStackTrace();
      }
      return output.toString();
      }
  
  }
  
• PAM Service - External Authentication LDAP

  My application runs using a domain user and I need to access it through a webservice using this AD user with LDAP on linux.

  For this I am using the PAM Service, I created the appauth file inside /etc/pam.d. I made the following configuration :

  auth sufficient pam_unix.so use_first_pass 
  account sufficient pam_unix.so
  

  The following error occurs:

  pam_unix (appauth: auth): auth could not identify password for [webuser]
  

  Why would this happen?

  I was in doubt also between using the module pam_linux or pam_ldap.
• Freeze linux console ( with "USE DIRECT CONNECTION (NO GATEWAY)")

  I'm managing virtual machine in my office. I have one problem. One of the vms has freeze console. If force reboot, same problem occur. like below.

  

  why this happen? and how to fix it? I don't know about this linux version.
• angularjs app aws cloudfront routes without /#/ access denied

  I want to remove /#/ in angularjs app url. I could successfully add rewrite rules to s3 bucket. So, the s3 bucket url works without /#/ in url. I set html5mode true in angularjs app. So, it works perfectly.

  <RoutingRules>
    <RoutingRule>
      <Condition>
        <HttpErrorCodeReturnedEquals>404</HttpErrorCodeReturnedEquals>
      </Condition>
      <Redirect>
        <HostName>myangularjsapp.com</HostName>
        <ReplaceKeyPrefixWith>#/</ReplaceKeyPrefixWith>
      </Redirect>
    </RoutingRule>
  </RoutingRules>
  

  This is s3 redirection rules. I used cloudfront distribution to linked with route53 domain. cloudfrontID.cloudfront.com/login doesn't work. AccessDenied is shown.
  When enter cloudfrontID.cloudfront.com/#/login, it redirect to cloudfrontID.cloudfront.com/login and it works without access denied.
• SNS not executing while autoTagging the resources

  I am trying to execute AutoTag while any of the EC2 events happen. So through AWS document, I am able to perform this task.

  Now what I want is as soon as auto-Tagging happens I should get an email (through SNS) about- which user has initiated EC2 event.

  So simply What I want is as soon as someone initiates ec2 event auto-tagging, as well as email, should be sent about notifying the initiation by which user

  Here is the lambda code

  from __future__ import print_function
  import json
  import logging
  import time
  import datetime
  import boto3
  
  logger = logging.getLogger()
  logger.setLevel(logging.INFO)
  
  def lambda_handler(event, context):
      #logger.info('Event: ' + str(event))
      #print('Received event: ' + json.dumps(event, indent=2))
          ids = []
          try:
              region = event['region']
              detail = event['detail']
              eventname = detail['eventName']
              arn = detail['userIdentity']['arn']
              principal = detail['userIdentity']['principalId']
              userType = detail['userIdentity']['type']
  
              if userType == 'IAMUser':
                  user = detail['userIdentity']['userName']
  
              else:
                  user = principal.split(':')[1]
  
              logger.info('principalId: ' + str(principal))
              logger.info('region: ' + str(region))
              logger.info('eventName: ' + str(eventname))
              logger.info('detail: ' + str(detail))
  
              if not detail['responseElements']:
                  logger.warning('Not responseElements found')
                  if detail['errorCode']:
                      logger.error('errorCode: ' + detail['errorCode'])
                  if detail['errorMessage']:
                      logger.error('errorMessage: ' + detail['errorMessage'])
                  return False
  
              sns = boto3.client('sns')
  
              sns.publish(
              TopicArn = 'arn:aws:sns:xxxxxxxxxxxxxxx',
              Message = '${user} has initiated an Elastic Compute Service'
              )
  
              ec2 = boto3.resource('ec2')
  
              if eventname == 'CreateVolume':
                  ids.append(detail['responseElements']['volumeId'])
                  logger.info(ids)
  
              elif eventname == 'RunInstances':
                  items = detail['responseElements']['instancesSet']['items']
                  for item in items:
                      ids.append(item['instanceId'])
                  logger.info(ids)
                  logger.info('number of instances: ' + str(len(ids)))
  
                  base = ec2.instances.filter(InstanceIds=ids)
  
                  #loop through the instances
                  for instance in base:
                      for vol in instance.volumes.all():
                          ids.append(vol.id)
                      for eni in instance.network_interfaces:
                          ids.append(eni.id)
  
              elif eventname == 'CreateImage':
                  ids.append(detail['responseElements']['imageId'])
                  logger.info(ids)
  
              elif eventname == 'CreateSnapshot':
                  ids.append(detail['responseElements']['snapshotId'])
                  logger.info(ids)
              else:
                  logger.warning('Not supported action')
  
              if ids:
                  for resourceid in ids:
                      print('Tagging resource ' + resourceid)
                  ec2.create_tags(Resources=ids, Tags=[{'Key': 'Owner', 'Value': user}, {'Key': 'PrincipalId', 'Value': principal}])
  
              logger.info(' Remaining time (ms): ' + str(context.get_remaining_time_in_millis()) + '\n')
              return True
  
          except Exception:
              #logger.error('Something went wrong: ' + str(e))
              print('in catch')
              return False
  

  Thanks in advance
• AWS SES custom 'mail_from' is not getting verified if it's other than 'mail'

  Hi,

  I'm building a Laravel based application that is meant to send emails for users on their behalf. That means that they can add a custom domains and I'm using SES integration to verify them and send actual mail. Basically the app is working and almost done but one of our testers noticed that if you add a user domain and selecting a mail from value other than default one ('mail') then SES MAIL FROM domain just doesn't get verified, even though all the records are set and correct. However in case with 'mail_from' set to 'mail' verification works perfectly.

  (Should notice that I don't think that this has something to do with the API or my code as the same behavior can be seen when using AWS web interface so there's no code examples.
  I've also tried to Google this problem as much as I could as well as read SES manuals but still didn't find the answer.)

  So that leads me to a conclusion that I don't fully understand how this whole process works. Currently my best guess is that 'mail' is sort of a default value that you have to use (at least with SES) in order to be able to get verified and send 'first level' emails (I mean something like name@domain.com). But if you want to use anything other than 'mail' as from domain you actually have to create a matching subdomain that should be also verified by SES and only then you'll be able to use it. But in that case you'll be sending from something like name@subdomain.domain.com.
  
  I apologize for my bad understanding of how email protocol and SES in particular works, but I would really appreciate if any of you guys, who have more experience in that field could give me a hand and clarify this problem by pointing to the actual reason why that happens.

  Thanks!
• Output for ffmpeg

  Hello is there a way to output a saved image filename in a format such as yyyy-mm-dd_hrs:min:seconds_imagenumber? ie (img 2018-07-07_17:34:22_001). And the command has to include fps so that we are able to tweak the fps accordingly. The command also has to churn out images every second. Thanks!
• segmentation fault while installing rasa_nlu

  I am trying to use RASA to build a chatbot but I have an issue with the installation of RASA_NLU Here is the line I entered

  pip install rasa_nlu[spacy]
  Segmentation fault (core dumped)
  
• Refresh user folders in LDAP

  I have created couple of users on my ldap, and setup a couple of ubuntu ldap client machines, where users can login with their accounts. The problem is that if a user logins into two machines with his account, then for example creates a folder on the desktop in one of the two machines, he can't see the folder on the other machine. I wonder how to fix this so that updates are synched straight away across the machines? So that when a user logins in with his account from any machine he can see that it's the same and that his files and folders are there. Any advice please?
• CloudWatch dashboard: Environment failed to launch as it entered Terminated state

  I'm getting this error when something is wrong with a config file in the .ebextensions folder. There is nothing more in the log that would help. Where can I find additional information on what went wrong in cases like this?

  Log excerpt:

  08:09:42 UTC+0200   ROLLBACK_IN_PROGRESS    AWS::CloudFormation::Stack  pca-test    The following resource(s) failed to create: [pcaBackendEnvironment100WkHrs]. . Rollback requested by user.
  08:09:42 UTC+0200   CREATE_FAILED   AWS::ElasticBeanstalk::Environment  pcaBackendEnvironment100WkHrs   Environment failed to launch as it entered Terminated state
  Physical ID:pca-test
  Client Request Token:Console-CreateStack-45f9fd76-b43a-48ec-bab1-34f27f02c239
  08:09:11 UTC+0200   CREATE_IN_PROGRESS  AWS::ElasticBeanstalk::
  Environment pcaBackendEnvironment100WkHrs   Resource creation Initiated
  

  In this case, the error started after adding the Resources section to this file. Can anyone tell what's wrong with it?

  .ebextensions/cloudwatch.config:

  option_settings:
    aws:elasticbeanstalk:cloudwatch:logs:
      StreamLogs: true
  
  Resources:
    dashboard:
      Type: AWS::CloudWatch::Dashboard
      Properties:
        DashboardName: !Ref AWSEBEnvironmentName
        DashboardBody: !Sub |
          {
            "widgets": [
              {
                "type": "metric",
                "x": 6,
                "y": 0,
                "width": 6,
                "height": 6,
                "properties": {
                    "view": "timeSeries",
                    "stacked": false,
                    "metrics": [
                        [ "AWS/ApplicationELB", "RequestCount", "LoadBalancer", "${AWSEBV2LoadBalancer.Name}", { "stat": "Sum" } ]
                    ],
                    "region": "eu-west-1",
                    "period": 300
                }
              }
            ]
          }
  
• What's the API to read database config details in elastic beanstalk environment?

  AWS command line provides API to read elastic beanstalk environment information:

  aws elasticbeanstalk describe-environments --environment-ids 'e-438kcmnae5'

  However, I didn't find documentation to read the detailed database configuration (as shown in the browser console below) from an API.

  
• Unable to connect (SSH) to instance with elastic ip

  I'm having issues connecting to the (only) EC2 instance in my VPC. The VPC was has public and private subnets, a nat-gateway, an internet-gateway and a bunch of security groups. After trying nearly everything I'm at the stage of adding an Elastic IP that points to my EC2 instance without any luck of getting in. I've added SSH (port 22) 0.0.0.0/0 to ALL my security groups, just to try to connect, but nothing is working.

  The command I'm trying to ssh with is this ssh -i "path-to-my-key.pem" ec2-user@<public-dns>.eu-west-3.compute.amazonaws.com and the result is ssh: connect to host <public-dns>.eu-west-3.compute.amazonaws.com port 22: Operation timed out

  • VPC DNS Hostnames is set to true
  • VPC DNS Resolution is set to true
  • Instance has Public DNS (IPv4), the one i'm trying to connect to
• Returning file data in nodejs imageMagick

  I'm using ImageMagick for node using this package.

  As per the examples, I'm successfully writing a new/converted png file using the following code:

  gm('myfile.jpg')
  .resize(240, 240)
  .strip()
  .write('./test.png', (err => {
    if (err) console.log(err);
  }
  

  But what I actually want to do is get the file data of the newly created file, not write it. The ability to get the file data like this would be great (where datais the file data, although this below example obviously doesn't work):

  gm('myfile.jpg')
  .resize(240, 240)
  .strip()
  .write('./test.png', ((err, data) => {
    console.log(data);
  }
  

  Any advice would be most welcome :)
• Stream yields empty buffer on aws lambda when I try to setFormat to webp

  Using AWS Lambda to resize and convert images . It works fine. Now I want to convert image to webp extension also.

  My code works fine on local but it gives an error on Lambda

  function resize(last) {
     self.resize(width, height)
     .quality(80)
     .strip()
     .gravity('Center')
     .setFormat('webp')
     .toBuffer('webp', function(err, buffer) {
      if (err) last(err);
         else last(null, buffer);
     });
  

  This code gives error on AWS Lambda

  due to an error: Error: Stream yields empty buffer
  

  I think its due to missing webp format on Lambda
• Getting error when I try to use GraphicsMagick in nodejs

  I am using graphicsMagick in my node code.

     var tokenvalue;
     tokenvalue = randomstring.generate({
         length: 16,
         numeric: true,
         letters: true,
         special: false,
      });
      var image = tokenvalue + '.png';
      var pathToFile = path.join(__dirname, req.file.path)
      , pathToSnapshot =path.join(__dirname,pro_root_path+'public/uploads/thumbnail/'+image);
          gm(pathToFile).thumb(150, // Width
                      150, // Height
               pathToSnapshot, // Output file name
               40, // Quality from 0 to 100
               function (error, stdout, stderr, command) {
                     if (!error) {
                     console.log("command");
                     }
                     else {
                     console.log(error);
                     }
                    });
  

  Am getting error like this :

  Error: Could not execute GraphicsMagick/ImageMagick: gm "identify" "-ping" "-format" "%wx%h" "E:\vishnu\Thumbnail View for doc\folder\app\public\uploads\docs\tmp\mypdf.pdf" this most likely means the gm/convert binaries can't be found
      at ChildProcess.<anonymous> (E:\vishnu\Thumbnail View for doc\folder\node_modules\gm\lib\command.js:232:12)
      at emitOne (events.js:116:13)
      at ChildProcess.emit (events.js:211:7)
      at ChildProcess.cp.emit (E:\vishnu\Thumbnail View for doc\folder\node_modules\gm\node_modules\cross-spawn\lib\enoent.js:36:37)
      at Process.ChildProcess._handle.onexit (internal/child_process.js:198:12)
  

  I have done search and install graphics magic for windows. But even though am getting error. What I have to do. I need to convert pdf to thumbnail(in any format jpeg,png,gif) Is there any other npm to sort out this issue.