DEVOPS PRACTITIONER/NOVICE/Jul07-Aug04

Discussion in 'Cloud Computing' started by The Novice, Jul 7, 2018.

  1. The Novice

    The Novice Well-Known Member
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    Thread created for the DevOps Practitioner Certification Training batch being taken up by Siddharth.

    Topic: Devops Practitioner/Batch 3/Jul 7,8,14,15,21,22,28,29 Aug 4 2018
    Host: Siddharth
    Date: Every Saturday, Sunday, from Saturday, July 7, 2018 to Saturday, August 4, 2018
    Time: 7:30 pm, India Time (Mumbai, GMT+05:30)

    This forum/thread has been created for each and everyone who has taken up all or partially the classes which are scheduled of this batch.
    • Ensure all your queries regarding DevOps certification are posted here as and when you have it.
    • This forum will not only be active till the session ends but post that forever. So whenever you have any concerns even after the session completes don't hesitate to use thread.
    • Ensure that maximum benefit of this platform is used by each one of you.
    PS: Please like / comment on the forum messages so that it is visible that you are engaged in the forum discussions. Thanks.
     
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  2. Neeraj Kumar(4280)

    Neeraj Kumar(4280) New Member
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  3. Bharanidharan P

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    who can take this course? is it required to have cloud knowledge before taking up this course?
     
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  4. _33458

    _33458 New Member

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    My name is Deepankshi
     
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  5. Varsha Mahehwari

    Varsha Mahehwari Customer
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    test
     
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  6. The Novice

    The Novice Well-Known Member
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    who can take this course? Answered in the session itself. let me know if it is still needs clarification.

    is it required to have cloud knowledge before taking up this course? Absolutely NO.


    PS: Please like / comment on the forum messages so that it is visible that you are engaged in the forum discussions. Thanks.
     
    #6
  7. _32635

    _32635 the.kesavan
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    Testing Access. This is Murali Kesavan.
     
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  8. _33449

    _33449 Member

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    Quota 'SSD_TOTAL_GB' exceeded. Limit: 100.0 in region asia-south1. - any idea on this error , getting this error when creating a VM instance.
     
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  9. Bharanidharan P

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    please share some links or videos explained in simple way with example about Union File System.
    also, how do i run light weight linux shell on my windows 10 laptop? Windows Subsystem for Linux is fine or you recommend anything else? this way i dont have to connect GCP everytime to test something.
     
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  10. _32287

    _32287 Active Member
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    What is the difference between base image and parent image in docker?
     
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  11. _32287

    _32287 Active Member
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    When I am creating a chroot , I am getting below error :
    "
    /bin/bash: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory "

    I have correctly copied /bin/bash and the libraries associated with them to the jailed directory.
     
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  12. The Novice

    The Novice Well-Known Member
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    Please create with space of 50 GB as you may require lesser than that too during your lab exercise.

    PS: Please like / comment on the forum messages so that it is visible that you are engaged in the forum discussions. Thanks.
     
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  13. The Novice

    The Novice Well-Known Member
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    Here are few videos which I would suggest to go through for better understanding of Union File System:


    Also as of now would suggest to for GCP as the instance has been built keeping the course agenda in mind.

    Post the session you may opt for other platforms for more knowledge which I would help later on.

    PS: Please like / comment on the forum messages so that it is visible that you are engaged in the forum discussions. Thanks.
     
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  14. The Novice

    The Novice Well-Known Member
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    We are yet to cover the Docker Images section. Hope it gets answered there else do raise appropriately.

    PS: Please like / comment on the forum messages so that it is visible that you are engaged in the forum discussions. Thanks.
     
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  15. The Novice

    The Novice Well-Known Member
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    Please let me know which lab exercise are you stuck with and where along with step by step information of their execution.


    PS: Please like / comment on the forum messages so that it is visible that you are engaged in the forum discussions. Thanks.
     
    #15
  16. _32287

    _32287 Active Member
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    Hello,

    I am doing a lab (2.2) of creating a docker file and running a container after that.

    Docker image got created successfully.

    student@lab:~$ docker ps -a
    CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
    c21ca1530360 ssh:alpine "/bin/sh -c '[\"/usr/s" 15 minutes ago Exited (127) 15 minutes ago ssh
    3ee3e5272d9e alpine "/bin/sh" 4 days ago Exited (0) 4 days ago client
    student@lab:~$

    But I am not able to run the container. Please find below error :

    student@lab:~$ docker logs ssh/bin/sh: [/usr/sbin/sshd,: not foundstudent@lab:~$ docker run -d -p 2022:22 --name ssh alpine
    docker: Error response from daemon: Conflict. The name "/ssh" is already in use by container c21ca1530360eb3168bb66ba0721d60c051f9b5973f4e41e9952f69d5891b94f. You have to remove (or rename) that container to be able to reuse that name..See 'docker run --help'.

    Let me know the resolution asap.

    ~ Saumya
     
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  17. _32287

    _32287 Active Member
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    In continuation for the above post .

    student@lab:~$ docker run -d -p 2022:22 --name ssh ssh:alpine
    e3c6b09d89f4422af6d92e7ef6666e45d44d5d5170d5ce36d4bcaf681bce0f03
    student@lab:~$ docker logs ssh
    /bin/sh: [/usr/sbin/sshd,: not found
    student@lab:~$ ssh -p 2022 student@localhost
    ssh: connect to host localhost port 2022: Connection refused
    student@lab:~$
     
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  18. _32287

    _32287 Active Member
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    Also, in the lab 2.3 :

    when I am pulling the ubuntu image from the local registry, I am getting below error :

    docker push localhost:5000/Ubuntu
    The push refers to a repository [localhost:5000/ubuntu]
    b6f13d447e00: Pushed
    a20a262b87bd: Pushed
    904d60939c36: Pushed
    3a89e0d8654e: Pushed
    db9476e6d963: Pushed
    latest: digest: sha256:b3b3faa143218448e3a13d93f23eab31ad3127816067348e19a6973e53e96844 size: 1357
    student@lab:~$ docker images
    REPOSITORY TAG IMAGE ID CREATED SIZE
    ssh alpine 97c9284d28c0 About an hour ago 9.706 MB
    registry 2 b2b03e9146e1 8 days ago 33.32 MB
    alpine latest 11cd0b38bc3c 8 days ago 4.413 MB
    debian latest 9a5d7185d3a6 2 weeks ago 100.6 MB
    localhost:5000/ubuntu latest 113a43faa138 5 weeks ago 81.15 MB
    ubuntu latest 113a43faa138 5 weeks ago 81.15 MB
    hello-world latest e38bc07ac18e 3 months ago 1.848 kB
    student@lab:~$ docker pull locathost:5000/ubuntu
    Using default tag: latest
    Error response from daemon: Get https://locathost:5000/v1/_ping: dial tcp: lookup locathost on 169.254.169.254:53: no such host
    student@lab:~$ docker images
    REPOSITORY TAG IMAGE ID CREATED SIZE
    ssh alpine 97c9284d28c0 About an hour ago 9.706 MB
    registry 2 b2b03e9146e1 8 days ago 33.32 MB
    alpine latest 11cd0b38bc3c 8 days ago 4.413 MB
    debian latest 9a5d7185d3a6 2 weeks ago 100.6 MB
    localhost:5000/ubuntu latest 113a43faa138 5 weeks ago 81.15 MB
    hello-world latest e38bc07ac18e 3 months ago 1.848 kB
    student@lab:~$


    Please advise !!


    Regards
    Saumya
     
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  19. _32326

    _32326 New Member

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    Hello,
    I am doing Lab 2.2 .I am getting below error, while creating docker image using docker file. Could you please help ?
    I have followed the steps in the documents already.

    tudent@lab:~/build$ docker build -t ssh:alpine .
    Sending build context to Docker daemon 3.072 kB
    Step 1 : FROM alpine:latest
    ---> 11cd0b38bc3c
    Step 2 : RUN apk update
    ---> [Warning] IPv4 forwarding is disabled. Networking will not work.
    ---> Running in 2106d194cd3b
    fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/main/x86_64/APKINDEX.tar.gz
    ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.8/main: temporary error (try again later)
    WARNING: Ignoring APKINDEX.adfa7ceb.tar.gz: No such file or directory
    fetch http://dl-cdn.alpinelinux.org/alpine/v3.8/community/x86_64/APKINDEX.tar.gz
    ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.8/community: temporary error (try again later)
    WARNING: Ignoring APKINDEX.efaa1f73.tar.gz: No such file or directory
    2 errors; 13 distinct packages available
    The command '/bin/sh -c apk update' returned a non-zero code: 2

    Thanks,
    Sankar
     
    #19
  20. The Novice

    The Novice Well-Known Member
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    Your container is already there running with the name ssh hence in the next command you have to choose some other name. Due to conflict the error is coming.
     
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  21. The Novice

    The Novice Well-Known Member
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    Are you working on a personal or office laptop/system ? if office then it could be a problem.

    Else please share screenshot of all the commands along with the results that you executed for lab 2.2.
     
    #21
  22. _33420

    _33420 Member

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    kalyani - >

    1)Please share references for learning more on dockers networking , swarm , compose preferably with examples .
     
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  23. _33420

    _33420 Member

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    kalyani ->
    2)How about memory , cpu performance management in dockers , Application installations ,how do we integrate applications between containers that are dependent on each other.Any possibility of doing a small project on this ?
     
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  24. _33420

    _33420 Member

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    kalyani -> As we are new to devops we are not sure what exactly we need to know before going to make a change in career to devops so would like to know more on practical front too.

    what issues we may face in production environments
    1) while running dockers as different services or networks
    2) how to debug them ? do we have any tools ?
    3) how do share port details to third parties with whom we are interested in sharing the application .
    4)Any other issues we may need to discuss based out of your expertise
     
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  25. _32635

    _32635 the.kesavan
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    Kesavan here...
    I would like to learn Continuous Delivery Pipeline (not Continuous Deployment) and all inputs are welcome.
    1. What is Continuous Delivery Pipeline?
    2. How is CD Pipeline different from CI/CD? and
    3. What are the CD Pipeline tools available in the market?
     
    #25
    Last edited: Jul 15, 2018
  26. _32635

    _32635 the.kesavan
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    Kesavan here...
    1. Do we have any developers in our batch?
    2. What do you do for Code Quality (structure, naming, comments, security, quality and like)?
    3. What kind of tools do you use for Code Quality?
     
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  27. _32635

    _32635 the.kesavan
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    Kesavan Here.

    I worked on the Lab 2.2 and faced this error below. Did anyone had this issue?

    P.S., I am planning to flush and start fresh tomorrow.
    lab21.png
     
    #27
  28. _33449

    _33449 Member

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    I selected 20GB space. It worked Thanks
     
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  29. _33449

    _33449 Member

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    Hi Kesavan ,

    I am working as a .net developer.
    Code Quality Tool we use is Resharper and StyleCop.
    These tools will correct the naming structure , adding comments and other coding standards.
     
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  30. _32635

    _32635 the.kesavan
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    ====
    Thanks for the response. Your name please!
     
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  31. _33449

    _33449 Member

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    Bhagyashree
     
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  32. _33449

    _33449 Member

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    Starting VM instance "lab" failed.Error:Google Compute Engine is not available in this project you requested because it is in an inactive billing state .Billing state may take several minutes to update. - Please suggest on this
     
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  33. _32287

    _32287 Active Member
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    Even I faced the same issue. God knows why !!
    I have raised a ticket with the support.

    ~ Saumya
     
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  34. _32287

    _32287 Active Member
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    I am doing Lab 2.2 exercise and face an issue while building an image.

    I am uploading an image for the error.

    Please assist.

    ~Saumya
     

    Attached Files:

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  35. The Novice

    The Novice Well-Known Member
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    It is simply because you need to update your correct credit card details and get it verified.

    Since it hasn't been successful hence the error. Need to sort by yourself as these are personal information which shouldn't be shared with anyone.
     
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  36. The Novice

    The Novice Well-Known Member
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    you have not followed all the steps properly. The one where authorized key folder is created hence the error.
     
    #36
  37. _33449

    _33449 Member

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    Thanks for the reply. I updated the details again. But now i am getting below error:
    Starting VM instance "lab" failed. Error: The default network interface [nic0] is frozen.
    Should i create a new VM instance ?
     
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  38. _32287

    _32287 Active Member
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    I have updated the correct card details . Money too was deducted and still I am not able to use google instance lab. I have however created a ticket with google support.
     
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  39. The Novice

    The Novice Well-Known Member
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    Could you please share some screenshots of the problem that you are facing.
     
    #39
  40. The Novice

    The Novice Well-Known Member
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    Sure go ahead and let me know if you face any trouble.
     
    #40
  41. _32635

    _32635 the.kesavan
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    #41
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  42. _32635

    _32635 the.kesavan
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    The videos below are good intros.
    Watch between 1:20 and 8:40 minutes, that should suffice -
    Watch this for Namespace, cgroup and Union File System -
     
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  43. _32635

    _32635 the.kesavan
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    @sidh: Are we suppose to do the Capstone Project 1?
    > Kesavan
     
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  44. The Novice

    The Novice Well-Known Member
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    Yes, you have to do that too .
     
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  45. _32635

    _32635 the.kesavan
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    Unable to Join WebEx DevOps Certification Training Jul 21, 2018
    Hi:
    See the image. I am receiving the message "Today's class yet to start. Start time: 09:00 (CDT)", although it should have started by 9a US Central / 10a US Eastern. No one is picking up the phone call either from SimpliLearn. Please help.
    Best Regards,
    > Kesavan
    2018-07-21.png
     
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  46. _33420

    _33420 Member

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    same here , is anyone able to login

    upload_2018-7-21_9-31-56.png
     
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  47. The Novice

    The Novice Well-Known Member
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    All, due to technical glitch in Cisco Webex tool the session hasn't started yet. Sorry for all the inconvenience caused.

    Simplilearn team will reach out to you if the session starts today of which the probability as of now is uncertain.
     
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  48. _32635

    _32635 the.kesavan
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    Thanks for the update Sidh! Appreciated!
    > Kesavan
     
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  49. The Novice

    The Novice Well-Known Member
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    The session has started now please join in asap. Cheers !!
     
    #49
  50. _32287

    _32287 Active Member
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    By when can we expect the session for yesterday to get uploaded? Its not uploaded yet.
    Its already over 12 hours.
     
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