Install the Screenshot Microservice

This applies to: Visual Data Discovery

To install the Screenshot microservice:

Download the Screenshot microservice package using the link provided by Symphony Technical Support.
Install the software using the appropriate command below, modifying <filename> to match the installation package provided by Symphony Technical Support:

In CentOS 7 environments:
```
sudo yum localinstall <filename>.rpm
```
In Ubuntu environments:
```
sudo dpkg -i <filename>.deb
```

Install the correct version of ChromeDriver. Refer to the ChromeDriver documentation for more information.

Run the script install-dependencies.sh (located in the /opt/zoomdata/docs/screenshot-service/ installation directory) or enter the following commands on the command line (for all operating systems):

CHROMEDRIVER_LATEST_VERSION=$(curl -s https://chromedriver.storage.googleapis.com/LATEST_RELEASE)
curl -s -o /tmp/chromedriver.zip \
"https://chromedriver.storage.googleapis.com/${CHROMEDRIVER_LATEST_VERSION}/chromedriver_linux64.zip" sudo unzip /tmp/chromedriver.zip -d /usr/bin/
rm -f /tmp/chromedriver.zip

Optionally, modify the zoomdata.properties file to enable and set up the Screenshot microservice. In addition to enabling the Screenshot microservice, you can also set the time period for capturing screenshots of your visuals to be displayed on the dashboard library page.
- To create screenshots in the background, set the screenshot.daemon.enabled property to true:
- Specify which types of screenshots you want to enable. Set the screenshots.dashboards.enabled property to true if you want to enable capturing and displaying the screenshots for the dashboards.
When both screenshot.daemon.enabled and screenshots.dashboards.enabled properties are enabled, screenshots are created automatically when a dashboard is created or updated and at the rate specified by the screenshot.daemon.schedule.rate property (set in the next step of this procedure). If either the screenshot.daemon.enabled or screenshots.dashboards.enabled properties is disabled, screenshots are not created automatically, but you can still create a screenshot manually using the API.
Specify the frequency at which the screenshots are refreshed by configuring the property screenshot.daemon.schedule.rate=<n>h in zoomdata.properties. The default frequency is every 24 hours, but you can set your own frequency (in hours) by replacing <n> with your desired frequency.
Enable and start the Screenshot microservice. If you are using systemctl, run the following commands:
```
sudo systemctl enable zoomdata-screenshot-service

sudo systemctl start zoomdata-screenshot-service
```
If you are not using systemctl, adjust these commands accordingly. Additional information on restarting microservices is provided in Restart Symphony Microservices.
Watch the /opt/zoomdata/logs/screenshot-service.log file. The microservice is running successfully when the log displays a line similar to this:
```
"Started ScreenshotServiceApplication in 12.184 seconds
```