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

See also questions close to this topic

• How is this Docker service called?

  I am studying the Crunchy Postgres implementation to understand how it works.

  The Dockerfile at this link runs this start.sh script as a service which remains running until the service receives a kill signal.

  Can someone please explain each of the circumstances in which the start.sh script is called?

  Obviously, the start.sh script is run when the container is initialized. Under this scenario, the PG_MODE environment variable is set to equal set because that is the default setting in the kubernetes statefulset code at this link.

  However, the start.sh code contains a block of conditional logic for PG_MODE=replica located above the first PG_MODE=set conditional block. This indicates that start.sh can be called at times during which the PG_MODE variable has already been changed to differ from the set value defined in the Kubernetes code.

  So what are the situations under which the start.sh script/service can be called? And where in the open source github code can I find the code that would trigger start.sh at a time other than startup?
• Export keyboard shortcuts on linux mint mate

  Is there any way to export keyboard shortcuts in Linux Mint, so that they can be set on the same OS on other machine? Maybe the bindings are being stored in a plain file?
• Unable to output buffer

  I am trying to run nikto -h {url} on kali. My nikto -h command works fine, but when I add an URL, nothing is output.

  I am not sure if it is the process or something else.

  How can I see the output directly rather than buffering and displaying it?

  package main
  
  import (
          "bytes"
          "fmt"
          "log"
          "os/exec"
  //      "strings"
  )
  
  func main() {
          cmd := exec.Command("nikto","-h","google.com")
  //      cmd.Stdin = strings.NewReader("some input")
          var out bytes.Buffer
          cmd.Stdout = &out
          err := cmd.Run()
          if err != nil {
                  log.Fatal(err)
          }
  }
  
• Multiple Lambda functions from the sam.yml file

  Still waiting for actual AWS support for this: https://github.com/aws-samples/aws-serverless-samfarm/issues/5

  How is this suppose to work?

  My use case is I have an API Gateway fronted lambda that writes events to an SNS topic. I have another lambda that is subscribed to that topic.

  Could these lambdas be in separate repos? yes. Is part of the purpose of using a pub/sub pattern to separate these two applications in the first place? yes.

  BUT this is a simple app. The topic wont be shared with other functions and the whole thing is self contained. It should all be deployed together ideally all in the same template.

  I can easily add all the functions I want to my SAM template but how do I deploy them? Should they each have a different CodeURI? That mean I need to script copying and install each lambdas dependancies into a different folder then point the codeuri's for each lambda in the template to the different folder.

  Is there not better support for this?
• Kafka consumer repeatedly reads the same messages in multi-region AWS

  I'm building an event dissemination application, which is distributed in 3 AWS locations. The application in each site is connected to 2 kafka instances (located in one of the EC2), and depending on the application behavior it writes (produces) to one queue, or reads (consumes) from the other queue.

  The application is built with NodeJS and uses the kafka-node library (https://www.npmjs.com/package/kafka-node).

  The problem is that the consumer reads the messages, supposedly commits it, but once all messages are read, the consumer starts from the beginning. Besides that, the message in offset = 0 is always empty, even though I never produce an empty message.

  Suprisingly, this only happens when it is deployed in different locations. In my localhost setup works perfectly.

  Below is a snippet of my consumer:

  function consumeKafkaMessages() {
    const client = new kafka.KafkaClient({kafkaHost: process.env.KAFKA_CONSUMER_HOSTNAME});
  
    const consumer = new kafka.Consumer(
      client,
      [{ topic: config.KAFKA_TOPIC }],
      { autoCommit: true }
    );
  
    consumer.on('message', async function(message) {
      console.log("===============\n");
      console.log("Consumed operation from kafka => " + JSON.stringify(message));
      console.log("===============\n");
      let parsedMessage;
  
      let failed = false;
      try {
        parsedMessage = JSON.parse(message.value);  
      } catch (error) {
        failed = true;
      }
  
      if (!failed) {
        // application logic, not important
      }
    });
  

  Any idea?

  All the help is welcome :-)
• AWS hosting a single application using multi domain ssl with ELB

  Im using RoR to build a webshop for a customer, who owns multiple domains and desires to have a single backend to serve these domains a more or less simular webshop with some small differences between the shops and domains.

  Locally I've got everything working as expected, and going to http://shop1.test or http://shop2.test serves the same app, with small differences in the layout, and different products based on the store, so far so good.

  I've setup an Beanstalk environment with an Application Loadbalancer, and configured the listner with the additional SSL certs, but it didn't gave me the expected result.

  --

  question: Is the desired behavior possible on an AWS instance?

  domain1.com and domain2.com pointing to the same app, whilst the app is aware of the domain it is requested from over ssl with a single application load balancer serving one single app

  --
• Unable to navigate to /opt/lampp/htdocs in Ubuntu after granting permissions

  Problem
  I installed lampp in my fresh Ubuntu 18.04 computer. I'm using Gitkraken and i want to clone a repository inside /opt/lampp/htdocs, but Gitkraken gui shows me a permission error (Could not read the contents of opt) when i try to navigate to /opt or hardcode /opt/lampp/htdocs.

  What i have tried
  1. First i followed the steps from this question:
  sudo chown -R username:username /opt/lampp/htdocs
  2. Then i tried chmod
  sudo chmod 755 -R /opt/lampp/htdocs

  My folder owner is correct
  

  // htdocs owner:
  drwxrwxr-x 6 myusername myusername 4096 sep 20 23:27 /opt/lampp/htdocs/
  
  // Gitkraken is in:
  /snap/girkraken
  

  I don't know why i can't access that folder if my user is the owner. I'm running out of ideas. Any tips?

  Thanks!
• Linux no sound on headphone jack

  I am unable to get sound out of the headphone jack on my laptop while the speakers work properly, I`m running this;
  HP Spectre X360 (13-w010nd x360)
  Linux Lite 4.0 (based on Ubuntu 18 LTS)
  Im not aware of any other audio software besides ALSA and PulseAudio

  The sound output stops from the speakers when I plug in headphones (and I can confirm that the output port changes from 'speaker' to 'headphone' in alsamixer). When I last ran the laptop under Win10, the port worked, I can also confirm the headphones to be working on a different device (and these specific headphones worked under Win10 before).
  Solutions I've tried are;
  https://askubuntu.com/questions/829520/ubuntu-16-04-no-sound-from-speakers-only-headphones-working/929766 (I tried the reverse as well)
  https://bbs.archlinux.org/viewtopic.php?id=114946
  https://bbs.archlinux.org/viewtopic.php?id=161581

  I have attempted to change the analog-output-headphones.conf file in /usr/share/pulseaudio/alsa-mixer/paths/ to no avail. Running pactl list | grep 'Active Port' returns analog-output-speaker without headphones plugged in and analog-output-headphones with them plugged in. Also running pactl list sinks indicates that the active port switches between plugging in and out. Both seem to imply that jack insertion works as intended. I can't seem to find any indication of what would be wrong with my configuration.
  I'd really like help with this! If there's anything else you'd like me to mention, let me know!
• Virtual private network for creating cluster in Hadoop

  I am trying to create a 2 node cluster in Hadoop using rather than creating a common hotspot between two machine. I want to create a virtual private network so that I and my friend can work from far away is it possible and if then how to create a VPN in Ubuntu for making Hadoop cluster.

  Thanks in advance.
• How can I deploy multiple application inside single elastic beanstalk container in different IIS site

  Want to deploy Asp.net core application to elastic beanstalk. How can I deploy multiple application inside single container in different IIS site?

  I have a custom aws-windows-deployment-manifest.json which want to deploy using vsts build pipleline.
• How to set the health-check-type of an auto-scaling-group created by elastic-beanstalk as ELB programmatically?

  I just followed this tutorial to learn how to use eb command.

  One thing I want to do is to modify the Health Check Type of the auto scaling group created by Elastic-Beanstalk to ELB. But I just can't find how to do it.

  Here's what I have done:

  1. Change the Health Check Type of the environment dev-env to ELB through the AWS console.

  2. Use eb config save dev-env --cfg my-configuration to save the configuration file locally.

  3. The ELB health check type doesn't appear inside .elasticbeanstalk/saved_configs/my-configuration.cfg.yml file. This means that I must specify the health check type somewhere else.

  Then I find another article saying that you can put the health check type inside .ebextensions folder.

  So I make a modification to eb-python-flask, which is the example of the tutorial.

  Here's my modification of eb-python-flask.

  I thought that running eb config put prod, and eb create prod2-env --cfg prod with my eb-python-flask would create an environment whose health-check-type of the auto scaling group is ELB. But I was wrong. The health check type created by the eb commands is still EC2.

  Anyone know how to set the health check type programmatically?

  I don't want to set it through AWS console. It's inconvenient.
• Django and ElasticBeanstalk: Internal server error, HTTP/2 protocol will be inactive

  I'm trying to deploy my Django app in eb. I've created the environment on eb and even though all things seems good internal server error happens.

  I was just following the tutorial on official site. I already committed my requirements.txt and .ebextensions to my git. I set the environement variables on eb configuration.

  But there's an internal server error. And also eb open doesn't work.

  .ebextensions/django.config

  option_settings:
    aws:elasticbeanstalk:container:python:
     WSGIPath: config/wsgi.py
  

  settings.py

  ALLOWED_HOSTS = ["*"]
  

  I'm still using sqlite3 on local.

  error.log is like this

  [Mon Sep 17 03:26:31.366607 2018] [mpm_prefork:notice] [pid 10621] AH00169: caught SIGTERM, shutting down
  [Mon Sep 17 03:26:32.520377 2018] [suexec:notice] [pid 11711] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Mon Sep 17 03:26:32.536121 2018] [so:warn] [pid 11711] AH01574: module wsgi_module is already loaded, skipping
  [Mon Sep 17 03:26:32.538258 2018] [http2:warn] [pid 11711] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
  [Mon Sep 17 03:26:32.538272 2018] [http2:warn] [pid 11711] AH02951: mod_ssl does not seem to be enabled
  [Mon Sep 17 03:26:32.538809 2018] [lbmethod_heartbeat:notice] [pid 11711] AH02282: No slotmem from mod_heartmonitor
  [Mon Sep 17 03:26:32.538869 2018] [:warn] [pid 11711] mod_wsgi: Compiled for Python/3.6.2.
  [Mon Sep 17 03:26:32.538875 2018] [:warn] [pid 11711] mod_wsgi: Runtime using Python/3.6.5.
  [Mon Sep 17 03:26:32.541103 2018] [mpm_prefork:notice] [pid 11711] AH00163: Apache/2.4.33 (Amazon) mod_wsgi/3.5 Python/3.6.5 configured -- resuming normal operations
  [Mon Sep 17 03:26:32.541124 2018] [core:notice] [pid 11711] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  [Mon Sep 17 03:26:35.694597 2018] [:error] [pid 11716] /opt/python/run/venv/local/lib/python3.6/site-packages/storages/backends/s3boto3.py:282: UserWarning: The default behavior of S3Boto3Storage is insecure and will change in django-storages 2.0. By default files and new buckets are saved with an ACL of 'public-read' (globally publicly readable). Version 2.0 will default to using the bucket's ACL. To opt into the new behavior set AWS_DEFAULT_ACL = None, otherwise to silence this warning explicitly set AWS_DEFAULT_ACL.
  [Mon Sep 17 03:26:35.694625 2018] [:error] [pid 11716]   "The default behavior of S3Boto3Storage is insecure and will change "
  [Mon Sep 17 03:26:35.763182 2018] [:error] [pid 11716] /opt/python/run/venv/local/lib/python3.6/site-packages/storages/backends/s3boto3.py:282: UserWarning: The default behavior of S3Boto3Storage is insecure and will change in django-storages 2.0. By default files and new buckets are saved with an ACL of 'public-read' (globally publicly readable). Version 2.0 will default to using the bucket's ACL. To opt into the new behavior set AWS_DEFAULT_ACL = None, otherwise to silence this warning explicitly set AWS_DEFAULT_ACL.
  [Mon Sep 17 03:26:35.763199 2018] [:error] [pid 11716]   "The default behavior of S3Boto3Storage is insecure and will change "
  

  How can I fix this error?

  The part caused by django-storages solved. But other part is still the same.

  [Mon Sep 17 06:44:13.104471 2018] [mpm_prefork:notice] [pid 18559] AH00169: caught SIGTERM, shutting down
  [Mon Sep 17 06:44:14.259136 2018] [suexec:notice] [pid 19102] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
  [Mon Sep 17 06:44:14.274950 2018] [so:warn] [pid 19102] AH01574: module wsgi_module is already loaded, skipping
  [Mon Sep 17 06:44:14.277045 2018] [http2:warn] [pid 19102] AH10034: The mpm module (prefork.c) is not supported by mod_http2. The mpm determines how things are processed in your server. HTTP/2 has more demands in this regard and the currently selected mpm will just not do. This is an advisory warning. Your server will continue to work, but the HTTP/2 protocol will be inactive.
  [Mon Sep 17 06:44:14.277059 2018] [http2:warn] [pid 19102] AH02951: mod_ssl does not seem to be enabled
  [Mon Sep 17 06:44:14.277619 2018] [lbmethod_heartbeat:notice] [pid 19102] AH02282: No slotmem from mod_heartmonitor
  [Mon Sep 17 06:44:14.277677 2018] [:warn] [pid 19102] mod_wsgi: Compiled for Python/3.6.2.
  [Mon Sep 17 06:44:14.277681 2018] [:warn] [pid 19102] mod_wsgi: Runtime using Python/3.6.5.
  [Mon Sep 17 06:44:14.279864 2018] [mpm_prefork:notice] [pid 19102] AH00163: Apache/2.4.33 (Amazon) mod_wsgi/3.5 Python/3.6.5 configured -- resuming normal operations
  [Mon Sep 17 06:44:14.279883 2018] [core:notice] [pid 19102] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
  
• GraphicsMagick does not produce image

  I've recently upgraded Debian server from wheezy to jessie. My system is TYPO3. After server upgrade GraphicsMagick which is in use to generate thumbnails stopped generating them. Command to generate thumbnail is:

  '/usr/bin/gm' convert +profile '*' -sample 56x56 '/var/www/virtual/someserver.com/htdocs/fileadmin/grafika/2009_01_02/expo01.jpg'[0]
  

  Now I receive such error:

  /usr/bin/gm convert: Request did not return an image.
  

  and no thumbnail image is generated. What might be the reason behind that?
• Converting SVG to PNG without changing the font

  I'm trying to make a simple app which takes text from users and edit the text in svg file (generated from illustrator) and sends back to the user with the final result.

  I'm able to change the SVG file text in javascript but I'm having problems with converting it to png. When I do, it changes to a different roboto like font.

  Here is my svg

  <svg id="Layer_1" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 2248.1 769.99">
      <defs>
          <style>
              .cls-1{
                  font-size:350px;
                  font-family:Granger-Regular, Granger;
              }
          </style>
      </defs>
      <title>test</title>
      <text class="cls-1" x="50%" y ="50%" >
          <tspan  text-anchor="middle">Example</tspan>
          <tspan  text-anchor="middle" x="50%" y ="50%" dy="300">SVG</tspan>
      </text>
  </svg>
  

  Here is the code I'm using to convert,

  var fs = require('fs')
    , gm = require('gm');
  
  gm('./../src/images/test.svg')
      .write('./../src/images/test.png', function (err) {
          //console.log(err)
          if (!err) console.log('done');
      });
  

  Svg looks something like this,

  

  But when I convert it looks like this,

  So how can I fix it? :(
• how to accurately specify color with minimagick library?

  The current results I am getting with #draw is darker than the RGB I've specified, what am i missing?

  Current the text or image rendered with draw will have transparency covering the original.

  c.color "#336633"
  c.draw "text 20, 20 'Hello World'"