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Last modified by Alexandru Pentilescu on 2024/07/22 21:37
From version 10.1
edited by Alexandru Pentilescu
on 2024/07/22 21:05
Change comment: There is no comment for this version
To version 11.1
edited by Alexandru Pentilescu
on 2024/07/22 21:24
Change comment: There is no comment for this version

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163 163  wget https://github.com/prometheus/node_exporter/releases/download/v0.15.2/node_exporter-0.15.2.linux-amd64.tar.gz
164 164  {{/code}}
165 165  
166 +Once this is done, extract the contents of the archive:
167 +
168 +{{code language="bash"}}
169 +tar -xf node_exporter-0.15.2.linux-amd64.tar.gz
170 +{{/code}}
171 +
172 +We will be running this as its own user. In order to avoid having to create a home directory for that user, it's best if we move the utilities that just got extracted to the root directories:
173 +
174 +{{code language="bash"}}
175 +mv node_exporter-0.15.2.linux-amd64/node_exporter /usr/local/bin
176 +{{/code}}
177 +
178 +Create the new user:
179 +
180 +{{code language="bash"}}
181 +useradd -rs /bin/false node_exporter
182 +{{/code}}
183 +
184 +Create a new systemd service file, that will start the node_exporter automatically, after each boot:
185 +
186 +{{code language="systemd"}}
187 +[Unit]
188 +Description=Node Exporter
189 +After=network.target
190 +
191 +[Service]
192 +User=node_exporter
193 +Group=node_exporter
194 +Type=simple
195 +ExecStart=/usr/local/bin/node_exporter
196 +
197 +[Install]
198 +WantedBy=multi-user.target
199 +{{/code}}
200 +
201 +Once this has been done, reload the service files, enable the newly created service and start it:
202 +
203 +{{code language="bash"}}
204 +systemctl daemon-reload
205 +systemctl enable node_exporter
206 +systemctl start node_exporter
207 +{{/code}}
208 +
209 +== Installing Prometheus ==
210 +Prometheus will be aggregating all the data that is collected by the node_exporter and allowing for it to be queried with a standardized syntax.
211 +
212 +To install Prometheus, we must first download it:
213 +
214 +{{code language="bash"}}
215 +wget https://github.com/prometheus/prometheus/releases/download/v2.1.0/prometheus-2.1.0.linux-amd64.tar.gz
216 +tar -xf prometheus-2.1.0.linux-amd64.tar.gz
217 +{{/code}}
218 +
219 +Much like with node_exporer above, we will force Prometheus to run as its own user, for security reasons. As such, we should isolate its files to the root filesystem:
220 +
221 +{{code language="bash"}}
222 +mv prometheus-2.1.0.linux-amd64/prometheus prometheus-2.1.0.linux-amd64/promtool /usr/local/bin
223 +{{/code}}
224 +
225 +We should also create new directories to store the relevant data for Prometheus:
226 +
227 +{{code language="bash"}}
228 +mkdir /etc/prometheus /var/lib/prometheus
229 +{{/code}}
230 +
231 +Then move the current directories to the appropriate system-level locations:
232 +
233 +{{code language="bash"}}
234 +mv prometheus-2.1.0.linux-amd64/consoles prometheus-2.1.0.linux-amd64/console_libraries /etc/prometheus
235 +{{/code}}
236 +
237 +== Configuring Prometheus ==
238 +Create a new /etc/prometheus/prometheus.yml with the following contents:
239 +
240 +{{code language="yml"}}
241 +global:
242 + scrape_interval: 10s
243 +scrape_configs:
244 + - job_name: 'node'
245 + static_configs:
246 + - targets: ['localhost:9100']
247 +{{/code}}
248 +
249 +Once the above is done, we should create the new prometheus user:
250 +
251 +{{code language="bash"}}
252 +useradd -rs /bin/false prometheussudo chown -R prometheus: /etc/prometheus /var/lib/prometheus
253 +chown -R prometheus: /etc/prometheus /var/lib/prometheus
254 +{{/code}}
255 +
256 +Then, please create an /etc/systemd/system/prometheus.service file with the following contents:
257 +
258 +{{code language="systemd"}}
259 +[Unit]
260 +Description=Prometheus
261 +After=network.target
262 +
263 +[Service]
264 +User=prometheus
265 +Group=prometheus
266 +Type=simple
267 +ExecStart=/usr/local/bin/prometheus \
268 + --config.file /etc/prometheus/prometheus.yml \
269 + --storage.tsdb.path /var/lib/prometheus/ \
270 + --web.console.templates=/etc/prometheus/consoles \
271 + --web.console.libraries=/etc/prometheus/console_libraries
272 +
273 +[Install]
274 +WantedBy=multi-user.target
275 +{{/code}}
276 +
277 +Then reload:
278 +
279 +{{code language="bash"}}
280 +systemctl daemon-reload
281 +systemctl enable prometheus
282 +systemctl start prometheus
283 +{{/code}}
284 +
166 166  )))
167 167  
168 168