<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
    <id>https://srizan.dev/blog</id>
    <title>Sr Izan's Blog</title>
    <updated>2023-11-23T19:24:31.024Z</updated>
    <generator>https://github.com/jpmonette/feed</generator>
    <author>
        <name>Sr Izan</name>
        <email>izan@srizan.dev</email>
        <uri>https://srizan.dev</uri>
    </author>
    <link rel="alternate" href="https://srizan.dev/blog"/>
    <link rel="self" href="https://srizan.dev/blog/atom.xml"/>
    <subtitle>My little donowall place on the net</subtitle>
    <logo>https://srizan.dev/pfp.png</logo>
    <icon>https://srizan.dev/pfp.png</icon>
    <rights>Copyleft 2023, Sr Izan</rights>
    <entry>
        <title type="html"><![CDATA[My tales of MongoDB migration]]></title>
        <id>https://srizan.dev/blog/2</id>
        <link href="https://srizan.dev/blog/2"/>
        <updated>2023-11-11T23:00:00.000Z</updated>
        <summary type="html"><![CDATA[Here I ramble about the last service migration I did, MongoDB, and all the difficulties that came with it.]]></summary>
        <content type="html"><![CDATA[<h2>Introduction</h2>
<p>So, the last few months I&#39;ve been migrating services from my good old Raspberry Pi into my new HP server and the last service I migrated was MongoDB.</p>
<p>I&#39;ve been using MongoDB for a while now and I&#39;ve been using it for a few things, like my discord bots, <a href="https://github.com/SrIzan10/webhooks-ui">webhooks-ui</a> and probably other projects I don&#39;t remember right now.</p>
<p>So, let&#39;s get started!</p>
<h2>Testing the plan</h2>
<p>My database instance is on Docker with a replica set of 1 node (itself) so <a href="https://www.prisma.io/">Prisma</a> works.</p>
<p>My idea is to add the HP server as a secondary replica and then promote it to be the primary one, but I don&#39;t know if that will work, so we need to test some stuff.</p>
<p>I first created 2 docker containers on my <a href="https://gist.github.com/SrIzan10/50bc2ba689a4cc43bcbac2799cc733c9">main Ryzen machine</a>&#39;s WSL Ubuntu instance.</p>
<p>I created a <code>docker-compose.yml</code> file with the following content:</p>
<pre><code class="language-yml">version: &quot;3.8&quot;
services:
  mongo1:
    image: mongo:4.4.17-rc0-focal
    container_name: mongo1
    restart: always
    ports:
      - 27017:27017
    volumes:
      - ./mongo1:/data/db
    command: mongod --replSet mongoset
    networks:
      - mongo
  mongo2:
    image: mongo:4.4.17-rc0-focal
    container_name: mongo2
    restart: always
    ports:
      - 27018:27017
    volumes:
      - ./mongo2:/data/db
    command: mongod --replSet mongoset
    networks:
      - mongo
networks:
  mongo:
</code></pre>
<p>and ran it with <code>docker compose up -d</code>.</p>
<p>I went to connect with MongoDB Compass and it didn&#39;t work for some reason. I asked GPT and nothing. It looks like it accepted the connection but it won&#39;t connect, so I installed <code>mongosh</code> and tried to connect with that.</p>
<pre><code class="language-bash">$ mongosh mongodb://localhost:27017
</code></pre>
<p>...and it worked! That didn&#39;t make any sense, but okay, we can work with it.</p>
<p>I then connected to the <code>mongo1</code> instance and ran the following commands:</p>
<pre><code class="language-bash">&gt; rs.initiate()
</code></pre>
<p>and it worked, but only that same database connected. Before adding the second database to the replica, I went ahead and pinged it from the first container (just to check if the network configuration worked):</p>
<pre><code class="language-bash">docker exec mongo1 sh -c &quot;rm /bin/ping;apt update;apt install inetutils-ping -y;ping mongo2&quot;
</code></pre>
<p>I removed /bin/ping because I tried to transfer the binary from WSL to the container but it still needed some libraries and I didn&#39;t want to bother, so I just installed the package.</p>
<p>It worked, so I went ahead and added the second database to the replica set:</p>
<pre><code class="language-bash">&gt; rs.add(&quot;mongo2&quot;)
</code></pre>
<p>After waiting for it, the second database connected and everything was working fine. Let&#39;s create a collection and some documents on the primary replica (mongo1):</p>
<pre><code class="language-bash">&gt; use test
&gt; db.createCollection(&quot;test&quot;)
&gt; db.test.insertOne({ name: &quot;test&quot; })
</code></pre>
<p>and then, let&#39;s check if it&#39;s on the second replica (mongo2):</p>
<pre><code class="language-bash">$ mongosh mongodb://localhost:27017
</code></pre>
<pre><code class="language-bash">&gt; use test
&gt; db.getMongo().setReadPref(&quot;secondaryPreferred&quot;)
&gt; db.test.find()
</code></pre>
<p>and, yeah, that worked.</p>
<p>I don&#39;t really know if ORMs will read when connecting to the second replica, but for now it&#39;s fine as the main plan is on track.<br>So, to promote I connected to the primary replica (mongo1) and ran the following command:</p>
<pre><code class="language-bash">&gt; rs.stepDown()
</code></pre>
<p>And that worked! Woo! The second replica is now the primary one. We can now start <em>drum rolls please</em>:</p>
<h2>The migration</h2>
<p>This is it. We&#39;re doing it.</p>
<p>I went ahead and created a new docker-compose file on my server with the following content:</p>
<pre><code class="language-yml">version: &quot;3.8&quot;
services:
    mongo:
        image: mongo:4.4.17-rc0-focal
        container_name: mongodb
        restart: unless-stopped
        ports:
            - 27017:27017
        volumes:
            - ./mongo:/data/db
        command: mongod --replSet rs0
</code></pre>
<p>After deploying the stack, I connected using mongosh to the primary db and ran the following command:</p>
<pre><code class="language-bash">&gt; rs.add(&quot;ip&quot;)
</code></pre>
<p>and after waiting for a while it looked like it worked. I then connected to the new database and ran the following command to check if the replica cloned fine:</p>
<pre><code class="language-bash">&gt; db.getMongo().setReadPref(&quot;secondaryPreferred&quot;)
</code></pre>
<p>and let&#39;s just let the results speak for themselves:</p>
<pre><code class="language-bash">rs0 [direct: secondary] test&gt; show dbs
# author&#39;s note: some dbs are redacted for privacy reasons 
admin         80.00 KiB
api           80.00 KiB
ava           40.00 KiB
bask         168.00 KiB
config       144.00 KiB
local        348.00 KiB
vinci        428.00 KiB
rs0 [direct: secondary] test&gt; use vinci
switched to db vinci
rs0 [direct: secondary] vinci&gt; show tables
afk
birthdays
chatgpt
giveaways-enters
giveaways-message
padyama
suggestions
twitter
warns
youtube
rs0 [direct: secondary] vinci&gt; db.afk.find()
[
  {
    _id: ObjectId(&quot;sadfsad fsadfsdf&quot;),
    id: &#39;redacted&#39;,
    reason: &#39;redacted&#39;,
    __v: 0
  },
  {
    _id: ObjectId(&quot;asdfsadfadf&quot;),
    id: &#39;redacted&#39;,
    reason: &#39;readacted&#39;,
    __v: 0
  }
]
rs0 [direct: secondary] vinci&gt;
</code></pre>
<p>Nice. let&#39;s now try to write something to the database from Vinci:<br><img src="https://img.srizan.dev/Discord_a2iXkWYxwn.png" alt=""><br>That just worked and we can see it on the secondary replica:</p>
<pre><code class="language-bash">rs0 [direct: secondary] vinci&gt; db.afk.find({ id: &#39;703974042700611634&#39; })
[
  {
    _id: ObjectId(&quot;6550eccc6154a8c9030fe76a&quot;),
    id: &#39;703974042700611634&#39;,
    reason: &#39;test&#39;,
    __v: 0
  }
]
</code></pre>
<p>Let&#39;s now edit all .envs and change the database url to the new secondary one. For this I checked all dbs that I have and then go from top to bottom editing the secrets.</p>
<p>After that was done I needed to deploy all changes. I went ahead and created too many tabs on my terminal and ran the all deployment commands on each tab. At the same time.<br>I really hope that doesn&#39;t make my server run out of ram, because I&#39;m really short on that.</p>
<p>After executing all the commands I <code>rs.stepDown()</code>&#39;ed the primary Raspberry Pi replica and, as expected, the HP Server took over.</p>
<p>The last command of the day:</p>
<pre><code class="language-bash">&gt; rs.remove(&quot;ip&quot;)
</code></pre>
<p>...SIKE! I needed to check the logs of the containers to see if everything was working fine. The <code>api</code> and <code>vinci</code> to be exact.<br>This is because <code>api</code> runs Prisma and <code>vinci</code> runs the now defunct in my stack, <a href="https://mongoosejs.com/">mongoose</a>.</p>
<p>Luckily enough, both were fine, so I was free. Yay!</p>
<h2>Conclusion</h2>
<p>Welp, that was a lot of work. I&#39;m glad it&#39;s over. I got my HP server on July and it&#39;s now November and I just finished migrating.<br>Could I have done it in less time? Yes.<br>Was I lazy? Also yes.</p>
<p>So that answers all your questions.</p>
<p>I hope you enjoyed this my first blog post, and thankfully it was a big one.<br>This took 3 hours in total, but at the end of the day, it was worth it.</p>
<p>I&#39;ll see you in the next one!</p>
]]></content>
        <author>
            <name>Sr Izan</name>
            <uri>https://srizan.dev</uri>
        </author>
    </entry>
    <entry>
        <title type="html"><![CDATA[How to change the user password in Arch Linux if you forgot it]]></title>
        <id>https://srizan.dev/blog/3</id>
        <link href="https://srizan.dev/blog/3"/>
        <updated>2023-11-22T23:00:00.000Z</updated>
        <summary type="html"><![CDATA[This post was made for a certain person who loves to lose passwords]]></summary>
        <content type="html"><![CDATA[<p>Alright, let&#39;s do this. Fast.
Disclaimer: this only works when the /home directory is on the same partition, which is the default option if you don&#39;t specify.</p>
<h1>Step 1: Boot up a live environment.</h1>
<p>For the sake of simplicity, I&#39;ll be using the Endeavour OS Galileo installation media, but <a href="https://command-not-found.com/arch-chroot">any linux distro should work</a></p>
<p>When you&#39;re in, open the terminal:
<img src="https://img.srizan.dev/vmware_zCwt9ac9KE.png" alt=""></p>
<h1>Step 2: Mounting the linux distro</h1>
<p>Type in <code>lsblk</code>. This will show all mounted drives.
<img src="https://img.srizan.dev/vmware_LPBNlTo9BI.png" alt=""></p>
<p>Locate the drive and partition where your installation is.<br>It&#39;s usually the partition with the most space. The space is on the size row (duh)<br>If you have multiple drives with the same size and want more info about the volumes, type in <code>fdisk -l</code>.</p>
<p>In my case it&#39;s <code>/dev/sda1</code>.</p>
<p>So let&#39;s mount the partition to the <code>/mnt</code> directory with <code>sudo mount /dev/sda1 /mnt</code>.  </p>
<h1>Step 3: Chrootin&#39;</h1>
<p>Chroot is a linux tool which basically changes the root directory to whatever directory you specify. This will be used to run the <code>passwd</code> command inside your installation&#39;s context.</p>
<p>Arch Linux has it&#39;s own chroot command which does some magic in the background to make it useable on this distro&#39;s environments.</p>
<pre><code class="language-sh">sudo arch-chroot /mnt
</code></pre>
<p>should chroot into your installation and after a few seconds a shell will show up!<br><img src="https://img.srizan.dev/vmware_nyyqOA9ELo.png" alt=""></p>
<p>And now one last command, the one that actually changes the password:</p>
<pre><code class="language-sh">passwd yourusername
</code></pre>
<p>and boom! that&#39;s it! impressive, right? <code>exit</code> off the console and then reboot.</p>
<h1>The end</h1>
<p>That was quick.</p>
]]></content>
        <author>
            <name>Sr Izan</name>
            <uri>https://srizan.dev</uri>
        </author>
    </entry>
    <entry>
        <title type="html"><![CDATA[Welcome to my new blog!]]></title>
        <id>https://srizan.dev/blog/1</id>
        <link href="https://srizan.dev/blog/1"/>
        <updated>2023-08-19T22:00:00.000Z</updated>
        <summary type="html"><![CDATA[This post welcomes you to my new blog]]></summary>
        <content type="html"><![CDATA[<h1>Hey!</h1>
<p>This is probably the last time I&#39;m going to make a blog. I&#39;ve made a few in the past, but I&#39;ve never really stuck to them. I&#39;m hoping that this time will be different.<br>This one was made entirely from scratch using React and Markdown, initially trying to use MDX, but it was a pain to set up, and it didn&#39;t end up working in the end.<br>I&#39;m hoping to post about my projects, and maybe some other stuff too. I&#39;m not sure yet, but I&#39;ll figure it out as I go along.<br>Anyways, thank you for reading. I hope you enjoyed my UX/UI for this one!</p>
<p>PD: I need some help for making the blog text look good and readable, so hit me up on my Discord if you have any ideas.</p>
]]></content>
        <author>
            <name>Sr Izan</name>
            <uri>https://srizan.dev</uri>
        </author>
    </entry>
</feed>