How To Resolve “Certificate_Verify_Failed” error when trying an AWS CLI command?

2 Comments

Problem Scenario  You try to use an AWS CLI command, but you get an error.  The error says “[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:…)”

Possible solutions

#1  Redo the AWS configuration.  Issue this command: aws configure
Leave the AWS Access Key ID and the AWS Secret Access Key the way they are.  Look at the “Default region name.”  Verify there is no letter at the end. 

…

Continue reading “How To Resolve “Certificate_Verify_Failed” error when trying an AWS CLI command?”

The Apparent Story Behind OpenStack Component Log File Names

0 Comments

AWS used to have a separate API package from their CLI package; now the two are the same.  OpenStack components’ command line interface activity is captured in a log when proper thresholds are set (e.g., nova.conf, glance.conf etc.) and later met.  CLI activity (which bypasses Horizon) as well as GUI API activity (e.g., mouse clicks on buttons in Horizon) is written to a file named api.log.  The location of this api.log file follows this convention: /var/log/OpenStackComponentName/api.log (where “OpenStackComponentName” is nova,

…

Continue reading “The Apparent Story Behind OpenStack Component Log File Names”

How To Install Docker on an AWS Instance of RedHat Linux

0 Comments

Update on 11/20/20: We recommend you see How Do You Install the docker.service File on RHEL 8.x? instead of the directions below. (Many times this command will work: sudo yum -y install docker )

Update on 9/10/19: These directions below work to install Docker version 17.05.0-ce on RHEL 8.x.

These “directions” to install Docker on RedHat Enterprise Linux include a script and how to run it. 

…

Continue reading “How To Install Docker on an AWS Instance of RedHat Linux”

How To Install Docker on an AWS Instance of Ubuntu

0 Comments

Updated 12/26/18
Problem scenario
You want to install Docker.  You can make changes to the Ubuntu Linux repositories so you can use apt-get to install it.  How do you install Docker on an AWS EC-2 instance?

Solution
There is an alternative set of directions if you click on this link here (if you would prefer not to configure the apt-get repositories).  These directions below to install Docker on Ubuntu Linux include a script and how to run it (but the script below will make a change to the repositories that the Linux server uses). 

…

Continue reading “How To Install Docker on an AWS Instance of Ubuntu”

What is TCP port 8080 typically used for?

0 Comments

Question
What is TCP port 8080 typically used for?

Answer
Jenkins, Docker, NodeJS, Apache Ambari, Apache Marathon, Apache Tomcat, Amazon Web Services’ Elastic Load Balancer, JBoss Application Server, GitLab, M2MLogger (remote monitoring), InfoSphere BigInsights Console (IBM’s proprietary Hadoop and Spark solution), JasperReports (because of Apache Tomcat), remote management of physical routers, and enterprise network proxy services all commonly use port 8080. 

In part, taken from Learning AWS, 

…

Continue reading “What is TCP port 8080 typically used for?”

AWS S3 Problem: “The specified key does not exist.” How do you solve this?

0 Comments

Problem scenario:  You are trying to upload a file to S3 but get an error.  You use a command like this:
curl -T /path/to/sourcefile.java http://s3.amazonaws.com/my.bucket/sourcefile.java
You get an error in XML that includes “The specified key does not exist.”

Solution:  Check the path to your source file.  Verify your source file is there with the name you expect it to be.

…

Continue reading “AWS S3 Problem: “The specified key does not exist.” How do you solve this?”

How Do You Troubleshoot the Error “eve.exceptions.ConfigException: DOMAIN dictionary missing or wrong.”?

0 Comments

Problem scenario
You are trying to use Python Eve.  You are using Python’s interactive command prompt, and you run these two commands:

from eve import Eve
app = Eve()

But you get this error:

“File “/usr/local/lib/python2.7/dist-packages/eve/flaskapp.py”, line 138, in __init__
    self.validate_domain_struct()
  File “/usr/local/lib/python2.7/dist-packages/eve/flaskapp.py”, line 269, in validate_domain_struct
    raise ConfigException(‘DOMAIN dictionary missing or wrong.’)
eve.exceptions.ConfigException: DOMAIN dictionary missing or wrong.”

What should you do?

…

Continue reading “How Do You Troubleshoot the Error “eve.exceptions.ConfigException: DOMAIN dictionary missing or wrong.”?”

How Do You Copy Many Files from Your Linux Server into a Docker Container?

0 Comments

Problem scenario
You want to move copies of all the files in a given subdirectory (we’ll say /tmp/a/ for an example) on a Docker host to go into a Docker container.  

Solution
From the server use the command “docker ps” to find the container ID.  Now that you have the container ID, you can write a script to move copies of the files into the Docker container.  

…

Continue reading “How Do You Copy Many Files from Your Linux Server into a Docker Container?”

How To Install Docker on an AWS Instance of SUSE Linux?

0 Comments

Updated on 12/26/18

These directions show how to install Docker on SUSE Linux. These commands are for installing Docker 1.x on an AWS instance of SUSE 15.  These directions require that your AWS SUSE Linux server is in a security group that has access to the internet.  (If you want to see more directions for install Docker on different distributions of Linux in different public clouds, see this posting.)

Step #1 

…

Continue reading “How To Install Docker on an AWS Instance of SUSE Linux?”