{"id":198,"date":"2021-03-08T21:57:55","date_gmt":"2021-03-08T21:57:55","guid":{"rendered":"https:\/\/andrejacobs.org\/?p=198"},"modified":"2022-04-11T20:24:24","modified_gmt":"2022-04-11T20:24:24","slug":"100-days-of-learning-day-0-serverless-openfaas-and-multipass","status":"publish","type":"post","link":"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-0-serverless-openfaas-and-multipass\/","title":{"rendered":"100 Days of Learning: Day 0 &#8211; Serverless, OpenFaaS and Multipass"},"content":{"rendered":"\n<p class=\"has-small-font-size\">Photo by <a href=\"https:\/\/unsplash.com\/@lucabravo?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Luca Bravo<\/a> on <a href=\"https:\/\/unsplash.com\/s\/photos\/function?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Unsplash<\/a><\/p>\n\n\n\n<div class=\"wp-block-jetpack-markdown\"><p>Today I started a 100 Day challenge to learn about new things.<\/p>\n<p>See my <a href=\"https:\/\/github.com\/andrejacobs\/100DayChallenges\/blob\/main\/2021%20March\/100DaysOfLearning\/100DaysOfLearning.md\">Log book<\/a>\nfor more information about my challenge.<\/p>\n<p>The first topic I want to learn about is the idea of Function as a Service (FaaS) and to start off on this journey I will be working through <a href=\"https:\/\/blog.alexellis.io\/\">Alex Ellis&#8217;<\/a> <a href=\"https:\/\/gumroad.com\/l\/serverless-for-everyone-else\">Serverless for Everyone Else<\/a> book.<\/p>\n<p>Next I will go over the steps I took to get my first function deployed on my Mac.<\/p>\n<h2>Installing Multipass<\/h2>\n<p>Follow the instructions at: <a href=\"https:\/\/multipass.run\/\">https:\/\/multipass.run\/<\/a> for macOS<\/p>\n<ul>\n<li>\n<p>Download and run the installer as an Admin user<\/p>\n<\/li>\n<li>\n<p>Spin up an Ubuntu instance, test and delete<\/p>\n<p>Spin up (this took about 5 minutes the first time to get the latest Ubuntu LTS image)<\/p>\n<pre><code>  $ multipass launch --name test\n  Launched: test\n<\/code><\/pre>\n<p>Test a command<\/p>\n<pre><code>  $ multipass exec test -- lsb_release -a\n  No LSB modules are available.\n  Distributor ID:\tUbuntu\n  Description:\tUbuntu 20.04.2 LTS\n  Release:\t20.04\n  Codename:\tfocal\n<\/code><\/pre>\n<p>List instances<\/p>\n<pre><code>  $ multipass list\n  Name     State      IPv4            Image\n  test     Running    192.168.64.2    Ubuntu 20.04 LTS\n<\/code><\/pre>\n<p>Stop and clean up\n$ multipass stop test\n$ multipass delete test\n$ multipass purge<\/p>\n<\/li>\n<\/ul>\n<h2>Installing faasd<\/h2>\n<ul>\n<li>\n<p>Create a new Ubuntu instance using <code>multipass<\/code><\/p>\n<p>2 cores and 2 gigs of RAM<\/p>\n<pre><code>  $ multipass launch --name faasd --cpus 2 --mem 2G\n  Launched: faasd\n<\/code><\/pre>\n<\/li>\n<li>\n<p>Open a bash shell on the Ubuntu instance<\/p>\n<pre><code>  $ multipass exec faasd \/bin\/bash \n  To run a command as administrator (user &quot;root&quot;), use &quot;sudo &lt;command&gt;&quot;.\n  See &quot;man sudo_root&quot; for details.\n\n  ubuntu@faasd:~$\n<\/code><\/pre>\n<p><img decoding=\"async\" src=\"wp-content\/uploads\/2021\/03\/multipass_launch.png\" alt=\"\"><\/p>\n<\/li>\n<li>\n<p>Copy your ssh public key over to the instance so we can run ssh sessions directly against the instance<\/p>\n<p>NOTE: See the last section on how to create a SSH key if you don&#8217;t already have one.<\/p>\n<pre><code>  $ cat ~\/.ssh\/id_rsa.pub | pbcopy\n  [pbcopy copies to the clipboard on macOS]\n  \n  Edit the authorized ssh keys for the instance and add the id_rsa.pub value\n  ubuntu@faasd:~$ nano ~\/.ssh\/authorized_keys\n<\/code><\/pre>\n<\/li>\n<li>\n<p>Test ssh to the instance. Open a new terminal.<\/p>\n<p>Get the IP address of the instance<\/p>\n<pre><code>  $ multipass info faasd\n  Name:           faasd\n  State:          Running\n  IPv4:           192.168.64.4\n  Release:        Ubuntu 20.04.2 LTS\n  Image hash:     c5f2f08c6a1a (Ubuntu 20.04 LTS)\n  Load:           0.00 0.00 0.00\n  Disk usage:     1.2G out of 4.7G\n  Memory usage:   148.6M out of 1.9G\t\t\n<\/code><\/pre>\n<p>SSH into the instance (note: ubuntu is the default username)<\/p>\n<pre><code>  $ ssh ubuntu@192.168.64.4\n<\/code><\/pre>\n<p>In my case because I have multiple keys for a number of services and because of the way my ~\/.ssh\/config file is setup, I need to explicitly state to use <code>PreferredAuthentications=publickey<\/code><\/p>\n<pre><code>  $ ssh -i ~\/.ssh\/id_rsa -o PreferredAuthentications=publickey ubuntu@192.168.64.4\n<\/code><\/pre>\n<\/li>\n<li>\n<p>Now you have two ways to get a shell on the running instance<\/p>\n<pre><code>  $ multipass exec faasd \/bin\/bash\n  or\n  $ ssh ubuntu@INSTANCE_IP\n<\/code><\/pre>\n<\/li>\n<li>\n<p>Install faasd on the instance<\/p>\n<p>Drop to root user (just incase sudo fails along the way)<\/p>\n<pre><code>  ubuntu@faasd:~$ sudo -i\n  root@faasd:~#\n<\/code><\/pre>\n<p>Clone the repo<\/p>\n<pre><code>  root@faasd:~# git clone https:\/\/github.com\/openfaas\/faasd --depth=1\n  Cloning into 'faasd'...\n  ...\n<\/code><\/pre>\n<p>Install<\/p>\n<pre><code>  root@faasd:~# cd faasd\n  root@faasd:~# .\/hack\/install.sh\n  ...\n  Creating alias 'faas' for 'faas-cli'.\n    ___                   _____           ____\n   \/ _ \\ _ __   ___ _ __ |  ___|_ _  __ _\/ ___|\n  | | | | '_ \\ \/ _ \\ '_ \\| |_ \/ _` |\/ _` \\___ \\\n  | |_| | |_) |  __\/ | | |  _| (_| | (_| |___) |\n   \\___\/| .__\/ \\___|_| |_|_|  \\__,_|\\__,_|____\/\n        |_|\n  \n  CLI:\n   commit:  6b5e7a14a598527063c7c05fb4187739b6eb6d38\n   version: 0.13.6\n<\/code><\/pre>\n<p>Verify faasd is running<\/p>\n<pre><code>  root@faasd:~\/faasd# systemctl status faasd\n  \u25cf faasd.service - faasd\n       Loaded: loaded (\/lib\/systemd\/system\/faasd.service; enabled; vendor preset: enabled)\n       Active: active (running) since Mon 2021-03-08 20:25:14 GMT; 5min ago\n     Main PID: 14201 (faasd)\n        Tasks: 7 (limit: 2344)\n       Memory: 37.8M (limit: 500.0M)\n       CGroup: \/system.slice\/faasd.service\n               \u2514\u250014201 \/usr\/local\/bin\/faasd up\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h2>Deploying your first function<\/h2>\n<p>I will be using the UI (web portal) for exploring the faasd setup as well as deploy my first FaaS.<\/p>\n<ul>\n<li>\n<p>Get the admin user&#8217;s password<\/p>\n<pre><code>  ubuntu@faasd:~$ sudo cat \/var\/lib\/faasd\/secrets\/basic-auth-password ;echo\n  zI24jRLe45DhUPa21S6BoNy5q1DpYUb0FuDwlLfUoBNo6yaDBMZEPTO2W3K\n<\/code><\/pre>\n<\/li>\n<li>\n<p>Open up the UI in your browser. E.g. http:\/\/INSTANCE_IP:8080<\/p>\n<\/li>\n<li>\n<p>Provide username &quot;admin&quot; and the password from the previous steps<\/p>\n<p><img decoding=\"async\" src=\"wp-content\/uploads\/2021\/03\/openfaas.png\" alt=\"\"><\/p>\n<\/li>\n<li>\n<p>Select &quot;Deploy New Function&quot; and search for &quot;ASCII Cows&quot;. Deploy it.<\/p>\n<\/li>\n<li>\n<p>After a few seconds or so you will see COWS in the sidebar. Select it.<\/p>\n<\/li>\n<li>\n<p>Invoke the function and you will get a random ascii cow<\/p>\n<\/li>\n<li>\n<p>You can also run curl against the deployed function<\/p>\n<pre><code>  $ curl http:\/\/192.168.64.4:8080\/function\/cows\n  *        (__)\n   \\       (OO)\n    \\-------\\\/\n     \/     \\\\\n    \/\/------\\\\\n   ^^        ^^\n  Cow who's just\n  seen a McDonalds\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<h2>Miscellaneous<\/h2>\n<h3>Creating a SSH key-pair<\/h3>\n<p>I like to have a SSH key-pair per machine or service I use and store a backup copy in my password manager (1Password). For this example I will just create the default id_rsa key pair that will also be used for connecting to the Ubuntu local instances.<\/p>\n<p>Run the following command to create a 4kb RSA public and private key-pair. The filenames will be id_rsa (the private key, never ever share this one!) and id_rsa.pub (the public key)<\/p>\n<pre><code>$ ssh-keygen -t rsa -b 4096 -f ~\/.ssh\/id_rsa -C &quot;Add a comment here if you want&quot;\n<\/code><\/pre>\n<p><img decoding=\"async\" src=\"wp-content\/uploads\/2021\/03\/generate_ssh_key.png\" alt=\"\"><\/p>\n<p>I use the password manager to generate a strong passphrase. To rule out any copy\/paste and unrecoverable errors in the future, I like to copy\/paste the stored secret from my recording (password manager entry) and then when asked to confirm, I manually type it in. This way I can be sure that what I copy\/paste will always be correct and at the very least I would be able to manually type it in if the need ever presented itself.<\/p>\n<p>Backup the generated key-pair (~\/.ssh\/id_rsa and ~\/.ssh\/id_rsa.pub) to your password manager. <strong>Tip:<\/strong> To see hidden files on macOS (in Finder or File dialogue) enter <code>Cmd + Shift + .<\/code> (period for dot files).<\/p>\n<p>Add the key to your macOS login keychain so you don&#8217;t have to always enter the passphrase.<\/p>\n<pre><code>$ ssh-add -K ~\/.ssh\/id_rsa<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Photo by Luca Bravo on Unsplash [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-0-serverless-openfaas-and-multipass\/\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":2,"featured_media":204,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[37],"tags":[35,36],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>100 Days of Learning: Day 0 - Serverless, OpenFaaS and Multipass - Andr\u00e9 Jacobs<\/title>\n<meta name=\"description\" content=\"I started a 100 Days of Learning Challenge and first up is to learn about Function as a Service using OpenFaaS.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-0-serverless-openfaas-and-multipass\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"100 Days of Learning: Day 0 - Serverless, OpenFaaS and Multipass - Andr\u00e9 Jacobs\" \/>\n<meta property=\"og:description\" content=\"I started a 100 Days of Learning Challenge and first up is to learn about Function as a Service using OpenFaaS.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-0-serverless-openfaas-and-multipass\/\" \/>\n<meta property=\"og:site_name\" content=\"Andr\u00e9 Jacobs\" \/>\n<meta property=\"article:published_time\" content=\"2021-03-08T21:57:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-04-11T20:24:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2021\/03\/luca-bravo-XJXWbfSo2f0-unsplash-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1280\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Andr\u00e9 Jacobs\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@andrejacobs81\" \/>\n<meta name=\"twitter:site\" content=\"@andrejacobs81\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Andr\u00e9 Jacobs\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-0-serverless-openfaas-and-multipass\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/andrejacobs.org\/100-days-challenge\/100-days-of-learning-day-0-serverless-openfaas-and-multipass\/\"},\"author\":{\"name\":\"Andr\u00e9 Jacobs\",\"@id\":\"https:\/\/andrejacobs.org\/#\/schema\/person\/3d38360883015e883c80c2fb875c5a68\"},\"headline\":\"100 Days of Learning: Day 0 &#8211; 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