http://blog.pdan.dev/tags/ansible/ Recent content in Ansible on myblog Hugo en-US Mon, 08 May 2023 21:29:01 +0800 http://blog.pdan.dev/posts/consul/ Mon, 08 May 2023 21:29:01 +0800 http://blog.pdan.dev/posts/consul/ <p><img src="images/consul1.svg" alt="consul1"></p> <p>Consul provides feature such as:</p> <ul> <li> <p>Service discovery</p> </li> <li> <p>Tagging</p> </li> <li> <p>Health checks</p> </li> <li> <p>Secure Service Communication</p> </li> <li> <p>Multi Datacenter</p> </li> <li> <p>System-wide key/value storage</p> </li> </ul> <p><img src="images/consul2.webp" alt="consul2"></p> <h2 id="server-vs-client">Server vs Client</h2> <p>Server:</p> <p>running on individual machine</p> <p>form a failsafe cluster</p> <p>communicating with client machine</p> <p>Client:</p> <p>working on machine were running service</p> <p>checking health of server</p> <p>sending information on server</p> <p>example config registration service</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-json" data-lang="json"><span style="display:flex;"><span><span style="color:#960050;background-color:#1e0010">`</span>{ <span style="color:#f92672">&#34;service&#34;</span>:{<span style="color:#f92672">&#34;name&#34;</span>: <span style="color:#e6db74">&#34;web&#34;</span>, <span style="color:#f92672">&#34;tags&#34;</span>:[<span style="color:#e6db74">&#34;be&#34;</span>], <span style="color:#f92672">&#34;port&#34;</span>: <span style="color:#ae81ff">80</span>,<span style="color:#f92672">&#34;check&#34;</span>:{<span style="color:#f92672">&#34;args&#34;</span>: [<span style="color:#e6db74">&#34;curl&#34;</span>, <span style="color:#e6db74">&#34;localhost&#34;</span>], <span style="color:#f92672">&#34;interval&#34;</span>: <span style="color:#e6db74">&#34;10s&#34;</span> }}}<span style="color:#960050;background-color:#1e0010">`</span> </span></span></code></pre></div><h2 id="instal-consul">Instal consul</h2> <p>create account consul</p> <pre tabindex="0"><code>useradd -s /bin/false -m consul </code></pre><p>download binar file <a href="https://developer.hashicorp.com/consul/downloads">https://developer.hashicorp.com/consul/downloads</a> for ubuntu</p>