The latest articles on Debug School by Sivakumar (@sivakumar99445). https://www.debug.school/sivakumar99445 https://www.debug.school/images/PuK--YL76qs3r2e10ajMKYciJRloHPkhW7kd3W7uvV0/rs:fill:90:90/g:sm/mb:500000/ar:1/aHR0cHM6Ly93d3cu/ZGVidWcuc2Nob29s/L3VwbG9hZHMvdXNl/ci9wcm9maWxlX2lt/YWdlLzM0OS83N2I3/NTE0ZS00MjI0LTQx/ZGUtYTRiNi0yNDg0/M2Q0OWI3ZjIucG5n https://www.debug.school/sivakumar99445 en Sivakumar Tue, 17 Jan 2023 16:38:29 +0000 https://www.debug.school/sivakumar99445/datadog-assignment-infra-17-jan-5hjd https://www.debug.school/sivakumar99445/datadog-assignment-infra-17-jan-5hjd <h2> Datadog Agent </h2> <p>The Datadog Agent is a software that runs on your hosts that collects events and metrics from hosts and sends them to Datadog (SAAS), where we can analyze the collected monitoring and performance data.</p> <h2> Methods to send data to Datadog </h2> <ol> <li>Collector collects host infra data.</li> <li>DogstatsD collects application metrics on code level.</li> <li>Both the above collected data will be transferred to forwarder using TCP protocol.</li> <li>Forwarder send data to DataDog SAAS using http protocol.</li> <li>For Apache, the metrices will be saved separately which in-turn was fetched by DataDog agent.</li> <li>From DataDog SAAS, the metrices will be published or fetched in DataDog UI</li> </ol> <h2> Top 10 commands of Datadog Agent </h2> <div class="highlight js-code-highlight"> <pre class="highlight plaintext"><code>datadog-agent health datadog-agent status datadog-agent stop datadog-agent check datadog-agent hostname datadog-agent launch-gui datadog-agent run datadog-agent version datadog-agent config datadog-agent diagnose </code></pre> </div> <h2> Top 10 Techniques for troubleshooting Datadog Agent </h2> <ul> <li>Check Datadog Agent Process is running or not</li> <li>Check Datadog Agent Logs for Error</li> <li>Check Datadog Agent Configuration file(datadog.yaml) syntax Error</li> <li>Check Datadog Integration Configuration file(datadog.yaml) syntax Error</li> <li>Check Datadog Agent API Key in datadog.yaml</li> <li>Check ENV variable set for Datadog Agent conflict with datadog.yaml</li> <li>Print the runtime configuration of a running agent</li> <li>Print all configurations loaded &amp; resolved of a running agent</li> <li>Execute some connectivity diagnosis on your system</li> <li>Print the current agent health</li> <li>Print basic statistics on the metrics processed by DogStatsD</li> </ul> <h2> Top 10 Metrices of Linux Servers </h2> <p><code>system.cpu.idle<br> system.cpu.iowait<br> system.cpu.num_cores<br> system.cpu.system<br> system.cpu.user<br> system.disk.free<br> system.disk.in_use<br> system.disk.total<br> system.disk.used<br> system.mem.total<br> system.mem.usable<br> system.mem.used</code></p> <h2> Steps to enable apache integration in DataDog </h2> <ol> <li>Install datadog-agent in the host.</li> <li>Install Apache in the host and configure variables.</li> <li>Click on “Install Integration” in apache tile on integration tab</li> <li>Enable mod_status &amp; ExtendedStatus in Apache</li> <li>Enable Datadog Apache Integration configuration to start collecting your Apache metrics.</li> <li>Verify the Apache Metrics on Datadog Console</li> </ol> <h2> Top 10 Metrices of Windows Servers </h2> <p><code>system.cpu.idle<br> system.cpu.system<br> system.cpu.user<br> system.disk.free<br> system.disk.total<br> system.disk.used<br> system.disk.write_time<br> system.mem.free<br> system.mem.total<br> system.mem.usable<br> system.mem.used</code></p> <h2> Top 5 Metrices of Apache </h2> <p><code>apache.net.bytes_per_s<br> apache.net.request_per_s<br> apache.performance.cpu_load<br> apache.performance.idle_workers<br> apache.performance.max_workers</code></p>