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...California State University Stanislaus

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  • Svetlana Belkin: Back to Android (Again!)

    A few months ago, my dad wanted me to switch to the next gen phones. I didn’t want to do this because I was using and testing the Ubuntu (Touch). But with some though on what features that my Nexus 4 was missing,  those features” forced” me into switching. These were:

    • Expandable memory
    • A real GPS
    • A good cam
    • A good ROM that allows handwriting
    • Being able to read an e-book (from the browser)

    I remember that one at my classmates owned a Samsung Galaxy Note a few years ago. It has all at the features that I want out of my next phone.  A few weeks ago, I brought a international version of Samsung Galaxy Note Edge.  I already had it for two weeks, and I love it.  The edge screen is like the closest thing to Unity on the Ubuntu (Touch).

    But there are a couple of things that I dislike about Android and the stock ROM of Samsung Galaxy Note Edge:

    • Not being able to open a notification without unlocking the screen
    • Not being able to root the phone with command-line and adb tools

    I gave up on going all the way Google-free, there are many apps that F-droid does not have.  One example is Firefox- it’s being removed from the F-droid’s repos.  I also made VLC my media player for both audio and videos because it just rocks on Android.

    I still have my Nexus 4 and Nexus 7 and I will still try to test/play around with Ubuntu (Touch).

    I am also re-working my workflow and I will have a post about this soon…



  • Jorge Castro: Super fast local workloads with LXD, ZFS, and Juju

    I was at Config Management Camp last week in Belgium and I ran into James Page, who was running OpenStack on his laptop. I mean a real OpenStack in containers, not a devstack, a real thing you could poke at. He would stand it up, do a bit of work on it, commit, test, tear it all down, retest, and so on.

    He had repartitioned his hard drive so he could have a ZFS partition, and together with LXD and the OpenStack Juju Charms it all just worked and was very fast. His Thinkpad X230 was sweating a bit, but it all worked.

    I had to have this. Real instances with ip’s that behave just as they would on a real cloud, except you don’t spend money, and thanks to LXD and ZFS, hella fast. It’s up to you if you want to run xenial a few months before release, but for me it’s worth it, so I went all in. Here are my notes:

    First off you need a machine. :) I needed to redo my workstation anyway so this became an evening of moving drives around and scrounging some parts. When I was done I had an i7 3770, 16GB of RAM, 4x2TB drives, and 2 SSDs.

    Step 1 - Installation

    Install Xenial. I installed this on one of my SSDs. I used the normal ext4 filesystem. Next I had the 4x2TB drives and a 60GB Intel SSD, let’s put the spinning rust in a mirror, and use the SSD as cache for some decent writes (EDIT: Apparently the cache command in this context is for reads, not writes, thanks Manual Zachs for the correction). Feel free to set it up how you wanted, but I wanted a bunch of room so I could run large workloads and not worry about space or speed.

    # apt install zfsutils-linux
    # zpool create home mirror /dev/sda /dev/sdb /dev/sdc /dev/sdd cache /dev/sde
    

    As you can tell, /dev/sde is the SSD and we’re just going to use the array as our home directory. If you’re in your desktop you’ll want to logout and not be in your home directory so you don’t step on yourself when you do this. After some activity, you can see the SSD start to be used as a cache device:

    # zpool iostat -v
    
                   capacity     operations    bandwidth
    pool        alloc   free   read  write   read  write
    ----------  -----  -----  -----  -----  -----  -----
    home         132G  7.12T      3     64   314K  5.34M
      sda       33.0G  1.78T      0     16  78.8K  1.33M
      sdb       32.9G  1.78T      0     16  78.0K  1.33M
      sdc       32.9G  1.78T      0     16  78.7K  1.34M
      sdd       32.9G  1.78T      0     16  78.8K  1.34M
    cache           -      -      -      -      -      -
      sde       25.9G  30.0G      0     34  41.0K  4.19M
    ----------  -----  -----  -----  -----  -----  -----
    

    Step 2 - LXD configuration

    Now time for our containers …. first install what we need:

    sudo apt install lxd
    newgrp lxd
    

    The newgrp command puts you in the lxd group, and you don’t even need to log out, bad ass. Now we tell LXD to use our ZFS pool for the containers:

    lxd init
    

    And follow the directions, select zfs and put in your zpool name, mine was called home from the command above.

    LXD needs images of operating systems to launch containers (duh), so we’ll need to download them. While my host is xenial, we want trusty here because just like the real world, cloud workloads run on Ubuntu LTS:

    lxd-images import ubuntu trusty amd64 --sync --alias ubuntu-trusty
    

    Now chill for a minute while it gets images. Ok so now you’ve got lxd installed, let’s make sure it works by “sshing” into the container:

    lxc launch ubuntu-trusty my-test-container
    lxc exec my-test-container /bin/bash
    

    And there you go, you’re own new OS container. Make as many as you want, go nuts. Make sure you check out the fine docs at linuxcontainers.org

    Exit out of that and move on to step 3!

    Step 3 - Modelling Workloads on your shiny new setup

    Ok now we need to put something awesome on this. Check out the docs for the LXD provider for Juju, here’s the TLDR:

    sudo apt-add-repository -y ppa:juju/devel
    sudo apt update
    sudo apt install juju-local
    

    OK, now let’s tell Juju to use LXD:

    juju init
    juju switch lxd
    juju bootstrap --upload-tools
    

    Now let’s plop a workload on there … how about some realtime syslog analytics?

    juju deploy realtime-syslog-analytics
    

    Nine containers worth of Hadoop, Spark, Yarn, Flume, and we’ll plop an Apache Zeppelin on top to make it all pretty:

    Since we’re fetching all those Hadoop resources it’ll take a bit, on my system with decent internet about 10 minutes total from zero to finished. Do a watch juju status and the bundle will update the status messages with exactly what it’s doing. Keep an eye on IO and cpu usage while this is happening and if you’re coming from the world of VMs then prepare to be impressed.

    Step 4 - Small tweaks

    apt update and apt upgrade can be slow. If you think about it that’s a bunch of http requests, deb package downloads which are then unpacked, and then installed in the container. Multiply that 9 times and happening at the same time on your computer. We can mitigate this by telling juju to not update/upgrade when we spawn a new instance. Find ~/.local/share/juju/environments.yaml and turn off updates for your lxd provider:

    lxd:
        type: lxd
        enable-os-refresh-update: false
        enable-os-upgrade: false
    

    Since we publish cloud images every few weeks anyway (and lxd will refresh these for you via a cron job) you don’t really need to have every update installed when doing development. For obvious reasons, we recommend you leave updates on when doing things “for real”.

    Conclusion

    Well, I hope you enjoy the speed and convenience. It’s a really nice combination of technologies. And I haven’t even gotten to things like rollback, snapshots, super dense stuff, and more complex workloads. LXD, ZFS, and Juju each have a ton more features that I won’t cover today, but this should get you started working faster!

    In the meantime here are some more big data workloads you can play with. Next up will be OpenStack but that will be for another day.



  • David Tomaschik: Time for More Changes

    This isn’t the first time I’ve changed blogging platforms, and it probably won’t be the last. I got tired of having to do maintenance on a blogging platform, so I decided to look for something lightweight. Enter Jekyll.

    Jekyll is basically a static website compiler – it takes templates and content and produces static HTML output. No databases, no runtimes, no attack surface (beyond a static webserver). Given that I don’t mind writing in Markdown (in fact, I was using a Markdown plugin for Mezzanine), it seemed like a perfect fit. I wrote a quick script to get content out of Mezzanine/Django and export as HTML/Markdown, then spent some time tweaking the settings and theme (based on Hyde).

    I’m going to be setting a goal to blog at least once a week, so watch this space for updates. And if you notice something odd going on (I know there are some issues with old posts and code blocks) please email me or ping me on Twitter.



  • Michael Terry: FastMail is the Perfect Gmail Alternative

    If, for whatever reason, you’re looking to switch from Gmail, I think you’ll love FastMail.

    Its workflow, interface, and features will be immediately recognizable to you: it has conversation view, archiving, spam detection, categorization, filtering, keyboard shortcuts, a modern and fast web UI (ditto for mobile), fast search, calendars, contacts, two-factor authentication, and the option to use your own domain name.

    I’ve looked around and having even just that first one (a conversation view) is a shocking rarity in either webmail or mail apps. Let alone all those features.

    Switching is easy too. You can import email directly from Gmail and can just export/import any calendars and contacts from Google. Plus, for any shared calendars that you still want to host at Google, you can have FastMail show them and sync any changes.

    The big catch of course is that it isn’t free. But it’s not expensive either.

    I know this post reads like an ad, but I’m just genuinely pleased so far (and I’m intentionally not using a referral code on the link above). Hopefully the next person doesn’t have to do as much comparison shopping as I did.



  • Benjamin Mako Hill: Unhappy Birthday Suspended

    More than 10 years ago, I launched Unhappy Birthday in a fit of copyrighteous exuberance. In the last decade, I have been interviewed on the CBC show WireTap and have received an unrelenting stream of hate mail from random strangers.

    With a recently announced settlement suggesting that “Happy Birthday” is on its way into the public domain, it’s not possible for even the highest-protectionist in me to justify the continuation of the campaign in its original form. As a result, I’ve suspended the campaign while I plan my next move. Here’s the full text of the notice I posted on the Unhappy Birthday website:

    Unfortunately, a series of recent legal rulings have forced us to suspend our campaign. In 2015, Time Warner’s copyright claim to “Happy Birthday” was declared invalid. In 2016, a settlement was announced that calls for a judge to officially declare that the song is in the public domain.

    This is horrible news for the future of music. It is horrible news for anybody who cares that creators, their heirs, etc., are fairly remunerated when their work is performed. What incentive will there be for anybody to pen the next “Happy Birthday” knowing that less than a century after their deaths — their estates and the large multinational companies that buy their estates — might not be able to reap the financial rewards from their hard work and creativity?

    We are currently planning a campaign to push for a retroactive extension of copyright law to place “Happy Birthday,” and other works, back into the private domain where they belong! We believe this is a winnable fight. After all, copyright has been retroactively extended before! Stay tuned! In the meantime, we’ll keep this page here for historical purposes.

    —“Copyrighteous“ Benjamin Mako Hill (2016-02-11)