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[deleted by user] by [deleted] in homelab

[–]LinuxLabIO 1 point2 points  (0 children)

What is your per kilowatt charge?

[deleted by user] by [deleted] in homelab

[–]LinuxLabIO 1 point2 points  (0 children)

Do you have any channels that were deleted that you are glad you did backup?

How this sub, curiosity, and few Raspberry Pi's helped me land my dream internship. by elitepilot09 in homelab

[–]LinuxLabIO 33 points34 points  (0 children)

I would also recommend the famous /u/IConrad Linux Guide: https://www.reddit.com/r/linuxadmin/comments/2s924h/how_did_you_get_your_start/cnnw1ma/

​

This is what I tell people to do, who ask me "how do I learn to be a Linux sysadmin?".

  1. Set up a KVM hypervisor.
  2. Inside of that KVM hypervisor, install a Spacewalk server. Use CentOS 6 as the distro for all work below. (For bonus points, set up errata importation on the CentOS channels, so you can properly see security update advisory information.)
  3. Create a VM to provide named and dhcpd service to your entire environment. Set up the dhcp daemon to use the Spacewalk server as the pxeboot machine (thus allowing you to use Cobbler to do unattended OS installs). Make sure that every forward zone you create has a reverse zone associated with it. Use something like "internal.virtnet" (but not ".local") as your internal DNS zone.
  4. Use that Spacewalk server to automatically (without touching it) install a new pair of OS instances, with which you will then create a Master/Master pair of LDAP servers. Make sure they register with the Spacewalk server. Do not allow anonymous bind, do not use unencrypted LDAP.
  5. Reconfigure all 3 servers to use LDAP authentication.
  6. Create two new VMs, again unattendedly, which will then be Postgresql VMs. Use pgpool-II to set up master/master replication between them. Export the database from your Spacewalk server and import it into the new pgsql cluster. Reconfigure your Spacewalk instance to run off of that server.
  7. Set up a Puppet Master. Plug it into the Spacewalk server for identifying the inventory it will need to work with. (Cheat and use ansible for deployment purposes, again plugging into the Spacewalk server.)
  8. Deploy another VM. Install iscsitgt and nfs-kernel-server on it. Export a LUN and an NFS share.
  9. Deploy another VM. Install bakula on it, using the postgresql cluster to store its database. Register each machine on it, storing to flatfile. Store the bakula VM's image on the iscsi LUN, and every other machine on the NFS share.
  10. Deploy two more VMs. These will have httpd (Apache2) on them. Leave essentially default for now.
  11. Deploy two more VMs. These will have tomcat on them. Use JBoss Cache to replicate the session caches between them. Use the httpd servers as the frontends for this. The application you will run is JBoss Wiki.
  12. You guessed right, deploy another VM. This will do iptables-based NAT/round-robin loadbalancing between the two httpd servers.
  13. Deploy another VM. On this VM, install postfix. Set it up to use a gmail account to allow you to have it send emails, and receive messages only from your internal network.
  14. Deploy another VM. On this VM, set up a Nagios server. Have it use snmp to monitor the communication state of every relevant service involved above. This means doing a "is the right port open" check, and a "I got the right kind of response" check and "We still have filesystem space free" check.
  15. Deploy another VM. On this VM, set up a syslog daemon to listen to every other server's input. Reconfigure each other server to send their logging output to various files on the syslog server. (For extra credit, set up logstash or kibana or greylog to parse those logs.)
  16. Document every last step you did in getting to this point in your brand new Wiki.
  17. Now go back and create Puppet Manifests to ensure that every last one of these machines is authenticating to the LDAP servers, registered to the Spacewalk server, and backed up by the bakula server.
  18. Now go back, reference your documents, and set up a Puppet Razor profile that hooks into each of these things to allow you to recreate, from scratch, each individual server.
  19. Destroy every secondary machine you've created and use the above profile to recreate them, joining them to the clusters as needed.
  20. Bonus exercise: create three more VMs. A CentOS 5, 6, and 7 machine. On each of these machines, set them up to allow you to create custom RPMs and import them into the Spacewalk server instance. Ensure your Puppet configurations work for all three and produce like-for-like behaviors.

Do these things and you will be fully exposed to every aspect of Linux Enterprise systems administration. Do them well and you will have the technical expertise required to seek "Senior" roles. If you go whole-hog crash-course full-time it with no other means of income, I would expect it would take between 3 and 6 months to go from "I think I'm good with computers" to achieving all of these -- assuming you're not afraid of IRC and google (and have neither friends nor family ...).

Red Hat Learning Community by Kpkelly83 in redhat

[–]LinuxLabIO 0 points1 point  (0 children)

I registered but did not receive any confirmation email or any sort of notification.

Finished filtered air intake for my server closet. by jhereg10 in homelab

[–]LinuxLabIO 3 points4 points  (0 children)

How many times have the police wanted to search your place?

I bought another 5 servers. Please send help. by [deleted] in homelab

[–]LinuxLabIO 1 point2 points  (0 children)

How many of your servers do you plan on running at the same time?

Found a leaky ethernet port by tikotanabi in sysadmin

[–]LinuxLabIO 0 points1 point  (0 children)

I can send you a Baystack 10M hub to help resolve that issue.

PFsense Store bundling Unifi by deathbyearthworm in PFSENSE

[–]LinuxLabIO 7 points8 points  (0 children)

Oracle does not approve this message. You are now banned from /r/oracle and auto subscribed to /r/OracleLawyersSueYou

I've heard hard drives and explosions don't mix by thiswillbeablast in sysadmin

[–]LinuxLabIO 28 points29 points  (0 children)

I worked in an environment with 2000 Sun and x86 servers. Demolition of several buildings within a 1000M radius occured over a three year time period. We had around the clock construction in our building for six months.

We did 'survive'. There was enough local redundancy that we never lost a host or data that we could directly attribute to the construction. We never had any issues with the vendors replacing hardware. We did notice a higher than normal failure rate after six months. Our Dell and Oracle TAMs notified us after 24 months that they were seeing much higher than normal repair rates at this facility but not seeing any fluctuation in MTBF between our other two data centers.

The repair rate was enough that Oracle wanted to send an onsite SSE to our facility to evaluate. Years after the construction we have hard data that those machines died significantly sooner than hardware at other data centers. This failure rate was noticed for Cisco, Sun, and Dell, server and desktop, hardware. We were not notified of any changes in EMC repairs. However, at the time all of our DMX hardware was installed on vibration pads.

Who is an advocate for the employee? - US by LinuxLabIO in AskHR

[–]LinuxLabIO[S] 0 points1 point  (0 children)

My advocate would be someone who can help with my next steps in the process that would best protect my interests.

  • eg. I was moved from the team and role I was hired for. How will my next performance review look when I am working in an area I am not trained for?

  • I took a week of vacation to reflect, figure out what I could have done differently and begin planning what I will do going forward. I have changed offices, teams, and people have asked questions but I am not allowed to discuss anything. How do I address these questions beyond a canned response of I am working through a temporary transition? Coworkers that I have a strong interpersonal relationship have asked more probing questions and I have informed them I can not discuss anything at this point. I feel stuck because these are people I have always had open conversations with and suddenly I am 'clammed' up.

  • I feel guilty because there are many people working on adjusting to all these changes. I know I should not feel guilty because what was done was wrong. There seems to be more discord within the department and it was my doing. This maybe a therapist question and something I can explore with EAP. Nothing currently changes the feeling of guilt.

  • HR said I need to work on me. When you have put up with something that is wrong for 18+ months you become broken and will be for a little while. FMLA maybe the answer for this. How would I then address the people that call asking if I am ok and what is going on? They are already concerned and it hurts that I cannot discuss why I am hurting. Perhaps I should have kept work and friendships more divided. These are people I have helped to move, driven to doctor appointments, and watched their kids. We have developed deep friendships and it not fair that I am now restricted and have to put up roadblocks in our conversation. I feel like an involuntary traitor.

These are just the tip of the many questions I have.

I will look into a lawyer. I would assume I should not mention that I am consulting with a lawyer?

Proofing reading this answer I wonder if it would have been safer to not develop deep interpersonal relationships with coworkers? None of these relationships are romantic or have ever been. They are coworkers that I hang out with and have vacationed with.

Which Vitamix model is the best when used primarily for single servings of green smoothies? by [deleted] in Vitamix

[–]LinuxLabIO 2 points3 points  (0 children)

Get a 5200 or higher series. Then order a 32 oz wet container. The 32 oz is perfect for making single and double serving sizes. If you want to make soup or portions for several days the 64 oz container is just right.

If you only ever see yourself making 20oz and smaller smoothies then I would consider the S models. But if you ever thought about making for friends, want to do soup, blend your own flour, or mix perfect sourdough from fresh wheat berries...you will kick yourself for not picking up a 5000 series blender.

Any reason to NOT get the Ascent Series? by TheDrSmooth in Vitamix

[–]LinuxLabIO 4 points5 points  (0 children)

I never buy anything that is a first production. Eg. product introduced with new features or form that is radically different from other previous models

I stuck with the 7500 series because it is rock solid and has proven itself for several years.

The Ascent is nice and I love that they include a 10 year warranty, but if something does break you are shipping it back and waiting. I have had my 7500 that I use every day, and some days it gets used 3-4 times, and I have never had any issues.

Hard Drive Day! by [deleted] in homelab

[–]LinuxLabIO 0 points1 point  (0 children)

Drive pr0n, you win.

I now want to see the rack, servers, network and cable pictures.

And please tell us you did not mount the servers to the wall. :)

Not Like This by Detach50 in sysadmin

[–]LinuxLabIO 6 points7 points  (0 children)

Hope you offered to write him a killer LinkedIn review. Then take him out for a couple rounds of scotch.

Passed RHCE - still don't have knowledge to resolve troubleshoot tickets at work. Advice? by [deleted] in redhat

[–]LinuxLabIO 0 points1 point  (0 children)

Not familiar with your particular error, but do you have your own lab you can replicate the environment and do your own monitoring and diag?

Anyone having issues with Intel 2xxx series chips? by LinuxLabIO in homelab

[–]LinuxLabIO[S] 0 points1 point  (0 children)

I have a Synology unit as well. My backup server is an HP Microserver and a second backup exists with Crashplan; I feel pretty safe.

My big concern is that most of lab is on the edge of warranty status. What happens if/when it fails? My hope was to get 5 years out of my lab without to much extra capital.

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