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Sematext Monitoring FAQ

General

What should I do if I can't find the answer to my question in this FAQ?

Check the general FAQ for questions that are not strictly about Sematext Monitoring. If you can't find the answer to your question please email support@sematext.com or use our live chat.

Is there a limit to how many servers/nodes/containers I can monitor with Sematext?

There are no limits on the number of servers, nodes, or containers. Each Sematext Monitoring plan covers monitoring of a certain number of containers at no extra charge.

What types of applications and infrastructure can Sematext monitor?

See integrations. You can also send custom metrics.

Can I reduce the amount of logs generated by SPM monitor?

Yes, starting with 1.20.6 version of SPM client you can make SPM monitor reduce the number of messages it logs every minute (otherwise it logs detailed info about its monitoring lifecycle). To do that, change properties files of your Monitoring Apps. You can find those files with:

ls /opt/spm/spm-monitor/conf/spm-monitor-config-*.properties

You can adjust one or more of them, depending on which application's monitor log output you want to reduce. At the bottom of those files add the following line:

SPM_MONITOR_LOGGING_LEVEL=reduced

After you have made the changes, restart your SPM monitor. If you are using standalone agent, run: sudo service spm-monitor restart

Otherwise, restart your application/java process.

How frequently does SPM monitor collect metrics and can I adjust that interval?

SPM monitor by default collects metrics every 10 seconds. To reduce this frequency to 30 seconds, for example, simply add the following line to your SPM monitor properties files located in /opt/spm/spm-monitor/conf:

SPM_MONITOR_COLLECT_INTERVAL=30000

The value is expressed in milliseconds. If you are adjusting it, we recommend setting it to 30000. With bigger values it is possible some 1-minute intervals would be displayed without the data in the UI.

After you make this change, make sure SPM monitor is restarted (if using in-process monitor, restart the monitored services; if using standalone monitor, just run sudo service spm-monitor restart).

How much memory is standalone SPM monitor using and can it be adjusted?

By default, each standalone SPM monitor process is started with "-Xmx384m" setting. This means that its JVM heap will use 384 MB at most. In many cases SPM monitor doesn't actually need or use that much memory. If you want to be absolutely sure about it, simply lower this number in /opt/spm/spm-monitor/bin/spm-monitor-starter.sh, with the following variable (around line 63):

JAVA_OPTIONS="$JAVA_OPTIONS -Xmx384m -Xms128m -Xss256k"

You can change "-Xmx" part to "-Xmx192m" for example and see how it goes (check if SPM monitor is still working over the next few hours/days and is still not using much CPU).

We don't recommend changing this setting if you are monitoring Elasticsearch or Solr clusters with a high number of indices or shards. In those cases SPM monitor has to parse and gather large amounts of metrics data returned by Elasticsearch or Solr. Contact us in chat or via support@sematext.com if you'd like to get more info and help making this adjustment.

Can I use Sematext to monitor multiple applications running on the same server / VM?

Yes. There are really 2 different scenarios here:

  1. If each of those applications should be monitored under a different Monitoring App (e.g., you could have Solr running on your server along with some Java app and you want to monitor both - Solr would be monitored with Monitoring App of Solr or SolrCloud type, while the Java app would be monitored with Monitoring App of JVM type), just complete all installation steps (which are accessible from https://apps.sematext.com/ui/monitoring, click Actions > Install Monitor for app you are installing) for each of them separately.

  2. If you want them monitored under the same Monitoring App (e.g., you have 3 Solr instances running on a server), you must use different JVM name for each of them. To do this, "1. Package installation" step should be run only once on this machine, while "2. Client configuration setup" step should be run once for each of the 3 Solr instances (installation instructions are accessible from https://apps.sematext.com/ui/monitoring, click Actions > Install Monitor for app you are installing). When running script /opt/spm/bin/spm-client-setup-conf.sh in step "2. Client configuration setup", you should add jvmname parameter (and value) at the end of parameter list, like this:

sudo bash /opt/spm/bin/spm-client-setup-conf.sh 11111111-1111-1111-1111-111111111111 solr javaagent jvmname:solr1

In this example, we are setting up things for 3 separate Solr processes, monitored under JVM names: solr1, solr2 and solr3 (you choose any names), so this is adjusted command for solr1 instance.

In the remaining sub-steps of "2. Client configuration setup", replace word "default" with the jvmname value you just used.

"2. Client configuration setup" step will have to be repeated N times, once for each monitored application (in our example 3 times with 3 different jvmname values).

Note: By using this kind of setup, you will be able to see JVM stats of all 3 processes separately (JVM name filter is used to do the filtering). When it comes to other, non-JVM stats, they will be aggregated into single value (for instance, request rate chart will show sum of request rate value of these 3 Solr instances). If you want to see even non-JVM stats separately, you will have to create 3 separate SPM Solr applications (one for each Solr instance running on this machine).

Can I use Sematext to monitor my service which runs on Windows or Mac?

SPM client installers currently exist only for Linux, however there is still a way to monitor your service. If you are OK with installing SPM client on separate linux box, and pointing it (more about that further below) to your service (which should be monitored) running on Windows or Mac, you can use Sematext to monitor all non-OS related metrics. That means you will not be able to see CPU or system Memory metrics, but metrics specific to your process will be displayed (for example, in case of Solr, you will see all search, index, cache metrics along with all JVM metrics like pool memory, GC stats, JVM threads etc; as another example, in case of MySQL you will see all metrics related to connections, users, queries, handlers, commands, MyISAM, InnoDB, MySQL traffic, etc) .

When monitoring Solr, Elasticsearch, HBase, Hadoop and other Java-based services, you will have an option to choose between using In-process (javaagent) or Standalone monitor. The workaround described here requires the use of standalone monitor variant. Here's what you'd need to do to see your metrics in SPM:

  1. Install spm-client on any Linux box (you can use this box for anything else, it is needed here just to run a process which collects metrics and sends them to Sematext). Installation instructions are accessible from https://apps.sematext.com/ui/monitoring, just click Actions > Install Monitor for app are installing. In step 1 choose the "Other" tab to create a minimal installation. This will not install modules needed for monitoring OS metrics - if those modules were installed, they would collect OS metrics of your Linux box, which is probably something you don't need. If you decide to follow instructions from some other tab, keep in mind OS metrics displayed in Sematext UI will not be OS metrics of your Windows/Mac machine.
  2. In step 2, if you are given a choice between In-process and Standalone monitor, choose Standalone monitor. It will use remote JMX to collect metrics from your Windows/Mac machine. Just follow instructions given on Standalone tab. The only difference you will want to make is in -Dspm.remote.jmx.url parameter used in monitor properties. You will know where to adjust it if you follow standard instructions for Standalone monitor. While this parameter will usually have a value like -Dspm.remote.jmx.url=localhost:3000, in this case you will have to replace localhost with the address of your Windows/Mac machine(s) by which it can be reached from your helper Linux box.
  3. If you are monitoring something that doesn't offer a choice between In-process and Standalone monitor, installation instructions will explain where you can define your own address. Instructions typically use localhost, but you can instead use something like 10.1.2.3 or my-win-solr-server.mycompany.com to point to the machine that hosts the service you intend to monitor.

In case you want to monitor multiple machines belonging to the same cluster in this way, you can still use SPM monitor installed on a single Linux helper box. Just do this:

  • Create a separate Monitoring App (https://apps.sematext.com/ui/integrations) for each of the machines which should be monitored
  • For each of those Monitoring Apps (and your monitored machines), go through installation process presented after the app was created (installation instructions are accessible from https://apps.sematext.com/ui/monitoring, just click Actions > Install Monitor for app your are installing). Note: Since each Monitoring App uses its own token, they all have slightly different installation commands. Besides different token, you will also use different addresses of Windows/Mac machines that host the monitored service.

Can Sematext monitor metrics via http-remoting-jmx protocol (e.g. WildFly, JBoss, etc.)?

Yes. The following steps are needed:

  • In /opt/spm/spm-monitor/conf/spm-monitor-config-YOUR_TOKEN-default.rt look for a line similar to this (the file name might be a bit different, depending on app type you have chosen):
SPM_MONITOR_JAR="/opt/spm/spm-monitor/lib/spm-monitor-jvm.jar"

Replace this line with something like the following (e.g. in case of WildFly adjust the path depending on where your WildFly is installed, like /opt/wildfly/bin/client/jboss-cli-client.jar):

SPM_MONITOR_JAR="/opt/spm/spm-monitor/lib/spm-monitor-jvm.jar:/path/to/your/jboss-cli-client.jar"
  • Change the value of SPM_MONITOR_JMX_PARAMS in /opt/spm/spm-monitor/conf/spm-monitor-config-YOUR_TOKEN-default.properties. Of course, you can append to that additional JMX parameters, for example with password file location etc:
SPM_MONITOR_JMX_PARAMS="-Dspm.remote.jmx.url=service:jmx:http-remoting-jmx://localhost:9990"
  • Restart spm-monitor with: sudo service spm-monitor restart

At this point the metrics will start appearing in charts. If they don't, run the diagnostics script to get fresh output of errors: sudo bash /opt/spm/bin/spm-client-diagnostics.sh

If you see errors similar to:

Caused by: javax.security.sasl.SaslException: Authentication failed: all available authentication mechanisms failed:

java.io.FileNotFoundException: /opt/wildfly/standalone/tmp/auth/local8363680782928117445.challenge (Permission denied)

javax.security.sasl.SaslException: DIGEST-MD5: Cannot perform callback to acquire realm, authentication ID or password [Caused by javax.security.auth.callback.UnsupportedCallbackException

it means there is permissions issue on WildFly dirs. There are two ways to get around this:

  1. Run SPM monitor with the same user that is running WildFly. To do that, add an entry like this to the end of /opt/spm/spm-monitor/conf/spm-monitor-config-YOUR_TOKEN-default.properties:
SPM_MONITOR_USER="wildfly"

After that restart spm-monitor with: sudo service spm-monitor restart

  1. Change permissions for the problematic directory, adjusting the path to match your environment:
chmod 777 /opt/wildfly/standalone/tmp/auth

This approach is not encouraged because of the obvious security problem, so use such approach only while testing, or if other options are not possible. As usual, restart spm-monitor after this change.

When should I run Standalone and when Embedded SPM monitor?

Standalone SPM monitor runs as a separate process, while Embedded monitor runs embedded in the Java/JVM process. Thus, if you are monitoring a non-Java application, Standalone monitor is the only option. Standalone monitor is a bit more complex to set up when one uses it to monitor Java applications because it typically requires one to enable out-of-process JMX access, as described on Standalone SPM monitor page. With Embedded monitor this is not needed, but one needs to add the SPM agent to the Java command-line and restart the process of the monitored application. When running Standalone monitor one can update the SPM monitor without restarting the Java process being monitored, while a restart is needed when Embedded SPM monitor is being used. To be able to trace transactions or database operations you need to use the Embedded SPM monitor.

Can I use Sematext for (business) transaction tracing?

Yes, see Transaction Tracing.

Can I move SPM client to a different directory?

Yes. Starting with version 1.22.25, SPM client provides two scripts that can be used to move SPM client files/directories to another location:

  • Soft move script - Moves all SPM files/directories to a new location, but symlinks /opt/spm to the new location. Use this script if you are OK with having /opt/spm symlinked. This script is recommended for most situations since it keeps your SPM client installation completely in line with standard setup (all standard SPM client commands and arguments are still valid).

It accepts 1 parameter: new directory where SPM client should be moved to (if such directory doesn't exist, it will be created)

sudo bash /opt/spm/bin/move-spm-home-dir-soft.sh /mnt/some_dir

And that is it.

  • Full move script - Moves all SPM files/directories to a new location without leaving any SPM artifacts in /opt directory. Please note that using this script will make management of SPM client a bit harder (for example, there will be some required actions before running SPM client upgrade; also, if you are using in-process (javaagent) type of monitor you will need to adjust some paths in java arguments - more about that below).

It accepts 2 parameters: the current location (by default /opt/spm), and the new location (if such directory doesn't exist, it will be created). It can be run as:

sudo bash /opt/spm/bin/move-spm-home-dir.sh /opt/spm /mnt/some_other_dir/spm

If you are using in-process (javaagent) versions of SPM monitor to monitor Java-based applications, please adjust agent path(s) you use when starting application(s) you monitor with the SPM agent and make sure to use new location where old location was used before. Also add the following argument to the monitored application's Java process (you can add it right before -javaagent part; adjust the value to match directory you used):

-Dspm.home=/mnt/some_other_dir/spm

and restart your application/server.

Note: When doing SPM client update on systems where SPM client was moved to different directory using "2) Full move script", you will first have to move SPM client back to original /opt/spm directory:

sudo bash /opt/spm/bin/move-spm-home-dir.sh /mnt/some_other_dir/spm /opt/spm

and then proceed with regular update. After update is done, you can again move SPM client to location which suits you.

Is there an HTTP API?

Yes, see API Reference.

I have multiple Monitoring Apps installed on my machine, can I uninstall just one of them?

Yes, you can use the following command for that (it accepts only one parameter, token of Monitoring App you want to uninstall):

sudo bash /opt/spm/bin/spm-remove-application.sh 11111111-1111-1111-1111-111111111111

Can I disable SPM agent without uninstalling the SPM client?

Yes, just find its .properties file in /opt/spm/spm-monitor/conf and add to it:

SPM_MONITOR_ENABLED=false

After that restart the monitor to apply the change. In case of standalone agent, run:

sudo service spm-monitor restart

And in case of in-process agent, just restart the service that has this monitor's javaagent parameter.

Sharing

How can I share my Sematext Apps with other users?

See sharing FAQ.

What is the difference between OWNER, ADMIN, BILLING_ADMIN, and USER roles?

See info about user roles in sharing FAQ.

Agent Automation

Is there an Ansible Playbook for the SPM client?

Yes, see the Install and Configure playbooks, with examples.

Is there a Puppet Module for the SPM client?

Yes, see the Install and Configure module, with examples.

Is there a Chef Recipe for the SPM client?

Yes, see SPM client Chef Recipe example.

Agent Updating

How do I upgrade the SPM client?

If you have previously installed the SPM client package (RPM, Deb, etc.), simply upgrade via apt-get (Debian, Ubuntu, etc.), or yum (RedHat, CentOS, etc.), or zypper (SuSE).

Debian/Ubuntu:

# NOTE: this will update the sematext gpg key
wget -O - https://pub-repo.sematext.com/ubuntu/sematext.gpg.key | sudo apt-key add -
# NOTE: this does not update the whole server, just spm-client
sudo apt-get update && sudo apt-get install spm-client

RedHat/CentOS/...

# NOTE: this will update sematext repo file
sudo wget https://pub-repo.sematext.com/centos/sematext.repo -O /etc/yum.repos.d/sematext.repo
# NOTE: this does not update the whole server, just spm-client
sudo yum clean all && sudo yum update spm-client

SuSE:

sudo zypper up spm-client

After that is done, also do:

  • if you are using SPM monitor in in-process/javaagent mode - restart monitored server (restart your Solr, Elasticsearch, Hadoop node, HBase node... Exceptions: In case of Memcached, Apache and plain Nginx - no need to restart anything; in case of Redis only standalone SPM monitor exists so check below how to restart it)

OR

  • if you are using standalone SPM monitor, restart it with:
sudo service spm-monitor restart

Note: In case of Memcached, Apache and plain Nginx - after completing upgrade steps described above, you must also run commands described in Step 2 - Client Configuration Setup (which is accessible from https://apps.sematext.com/ui/monitoring, click Actions > Install Monitor for app you have installed)

Note: If you moved SPM client from /opt/spm to different directory, you will first have to move SPM client back to original /opt/spm directory:

sudo bash /opt/spm/bin/move-spm-home-dir.sh /mnt/some_other_dir/spm /opt/spm

and then proceed with regular update. After update is done, you can again move SPM client to location which suits you.

Agent Uninstalling

How do I uninstall the SPM client?

On servers where you want to uninstall the client do the following:

  1. remove spm-client, for instance: sudo apt-get purge spm-client
    OR sudo yum remove spm-client
  2. after that, ensure there are no old logs, configs, etc. by running the following command: sudo rm -R /opt/spm
  3. if you used in-process (javaagent) version of monitor, remove "-javaagent" definition from startup parameters of process which was monitored

Note: in case you used installer described on "Other" tab (found on https://apps.sematext.com/ui/monitoring, click Actions > Install Monitor for app your are installing), instead of commands from step 1 run: sudo bash /opt/spm/bin/spm-client-uninstall.sh . After that proceed with steps 2 and 3 described above.

Alerts

Can I send alerts to HipChat, Slack, Nagios, or other WebHooks?

See alerts FAQ.

What are Threshold-based Alerts?

See alerts FAQ.

What is Anomaly Detection?

See alerts FAQ.

What are Heartbeat Alerts?

See alerts FAQ.

Troubleshooting

Can I enable debugging in the SPM agent?

Yes. Simply add or edit the SPM_MONITOR_LOGGING_LEVEL property in any of the /opt/spm/spm-monitor/conf/spm-monitor/*.properties files and restart the agent (or the process the agent is attached to). Available levels are: FATAL, ERROR, WARN, INFO, DEBUG, TRACE

Can I install SPM client on servers that are behind a proxy?

Yes. If you are installing the RPM, add this to /etc/yum.conf:

proxy=http or https://proxy-host-here:port
proxy_username=optional_proxy_username
proxy_password=optional_proxy_password

If you are using apt-get, set the http_proxy environmental variable:

export http_proxy=http://username:password@yourproxyaddress:proxyport

Can SPM client send data out from servers that are behind a proxy?

Yes, just provide the proxy info in the /opt/spm/properties/spm-sender.properties file:

spm_sender_proxy_host=
spm_sender_proxy_port=
spm_sender_proxy_user_name=
spm_sender_proxy_password=

When installing SPM client, I see "The certificate of pub-repo.sematext.com is not trusted" or similar error. How can I avoid it?

There can be multiple reasons for this, most likely:

  • system time on your machine is not correct and adjusting it should fix the problem
  • you are installing SPM client as root user - in some cases that can cause this error and installing SPM client as a different user may help
  • you are missing the ca-certificates package. Use one of the following commands to install it:
sudo apt-get install ca-certificates
sudo yum install ca-certificates

If none of the above eliminates the problem for you try adding a flag to avoid certificate checking. In case the command with wget is failing in your case, add --no-check-certificate as wget argument. If command with curl is failing, add -k flag.

How do I create the diagnostics package?

If you are having issues with Sematext Monitoring, you can create diagnostics package on affected machines where SPM client was installed by running:

sudo bash /opt/spm/bin/spm-client-diagnostics.sh

The resulting package will contain all relevant info needed for our investigation. You can send it, along with short description of your problem, to support@sematext.com or contact us in chat.

I see only my system metrics (e.g. CPU, Memory, Network, Disk...), but where is the rest of my data?

Make sure you have followed all steps listed on installation instructions page. Package installation steps should be done first, followed by Client configuration setup. If you have done that and you still don't see application metrics, run sudo bash /opt/spm/bin/spm-client-diagnostics.sh to generate diagnostics package and send it to support@sematext.com with description of your problem.

I do not see any system metrics (e.g. CPU, Memory, Network, Disk), what could be the problem?

Make sure you have followed all steps listed on installation instructions page. It is possible you missed Client configuration setup step. If you have done that and you still don't see application metrics, run sudo bash /opt/spm/bin/spm-client-diagnostics.sh to generate diagnostics package and send it to support@sematext.com with description of your problem.

I am using trying to monitor Solr / Elasticsearch. My Request Rate and Latency charts are empty?

If other Solr/ES charts are showing the data, it is most likely that there were no requests sent to your Solr/ES in the time range you are looking at. Try sending some queries and see if request rate/latency charts will show them. If they don't, please send us an email to support@sematext.com or contact us in chat.

I am not seeing any data in Monitoring charts. How do I check if network connectivity is OK?

SPM agents send the data to Sematext via HTTP(S) so it is important that servers where you install SPM agent can access the internet. Things to check to ensure network connectivity is ok:

1. Try connecting to spm-receiver.sematext.com / spm-receiver.eu.sematext.com (if using Sematext Cloud Europe) with the following command:

nc -zv -w 20 spm-receiver.sematext.com 443

The output should show something like: Connection to spm-receiver.sematext.com 443 port [tcp/https] succeeded!

In case you see some other result:

  • if your server requires proxy to access the internet, you can define its settings in /opt/spm/properties/spm-sender.properties. After that restart SPM agent.
  • if firewall is used to protect your server, it may be blocking outbound traffic from it. SPM agent sends the data over port 443, so please ensure with your network admins that port 443 is open for outbound traffic
  • check your DNS (see below)

2. Check if your DNS has correct entries for SPM Receiver:

nslookup spm-receiver.sematext.com
nslookup spm-receiver.eu.sematext.com

The output of this command should look like this, although the IP addresses and names may be somewhat different, as they change periodically:

Server:        127.0.1.1
Address:    127.0.1.1#53

Non-authoritative answer:
spm-receiver.sematext.com    canonical name = SPM-Prod-Receiver-LB-402293491.us-east-1.elb.amazonaws.com.
Name:    SPM-Prod-Receiver-LB-402293491.us-east-1.elb.amazonaws.com
Address: 50.16.206.179
Name:    SPM-Prod-Receiver-LB-402293491.us-east-1.elb.amazonaws.com
Address: 107.20.222.136

If you see different output, you may want to check with your network admins if everything with your DNS is ok or may need adjustment to be able to reach spm-receiver.sematext.com / spm-receiver.eu.sematext.com.

I don't see any of my metrics / I am getting errors when starting SPM monitor or when starting my service which uses javaagent version of SPM monitor. What should I check?

Here are a few things to check and do:

  1. Log into your monitored servers and make sure there are running SPM monitor processes (there should be more than one of them)

  2. Check if system time is correct. If not, you should adjust the time, restart the SPM monitor with:

    sudo service spm-monitor restart
    

    and restart any other javaagent (in-process) based SPM monitors by restarting your server which is being monitored.

  3. Check network connectivity as described elsewhere in the FAQ

  4. Make sure disks are not full

  5. Make sure user spmmon can have more than 1024 files open:

sudo vim /etc/security/limits.conf
spmmon     -    nofile    32000

and

sudo vim /etc/pam.d/su
session    required   pam_limits.so

Restart SPM monitor after the above changes.

  1. Check if hostname of your server is defined in /etc/hosts

  2. If you are starting your Jetty (or some other server) with command like java ... -jar start.jar ... and using inprocess (javaagent) version of monitor, make sure -D and -javaagent definitions occur before "-jar start.jar" part in your command

  3. If none of the suggestions helped, run sudo bash /opt/spm/bin/spm-client-diagnostics.sh to generate diagnostics package and send it to support@sematext.com

My server stopped sending metrics, so why do I still see it under Hosts Filter?

Filters have 1 day granularity, which means that a server will be listed under Hosts filter until 24 hours since it last sent data have passed. For example, if a server stopped sending data at 1 PM and if at 8 PM you are looking at the last 6 hours of data (for a period from 2 PM until 8 PM) you will not see data from this server on the graph, but you will still see this server listed under the Hosts filter until 1 PM on the following day. After 1 PM on the following day this server should disappear from the Hosts filter.

I rebooted my server and now I don't see any data in my graphs. What should I check?

Here are a few things to check and do:

  1. Make sure SPM monitor is running: sudo service spm-monitor restart
  2. Make sure disk is not full: df -h
  3. Make sure maximal open files limit was not reached: see "I registered for SPM more than 5 minutes ago and I don't see any of my data, what should I check?"

How come Disk Space Usage report shows more free disk space than df command?

Sematext Monitoring reports both free and reserved disk space as free, while df does not include reserved disk space by default.

I changed my server's hostname and now I don't see new data in my graphs. What should I do?

Simply restart SPM monitor:

sudo service spm-monitor restart

and restart any process which is using javaagent/in-process version of SPM monitor.

Can I specify which Java runtime the SPM monitor should use?

Yes, you can edit the /opt/spm/properties/java.properties file where you can specify the location of Java you want the SPM monitor to use.

Can SPM client use HTTP instead of HTTPS to send metrics from my servers?

Yes, although we recommend using HTTPS. Since version 1.22.0, SPM client by default uses HTTPS to send metrics data to Sematext. If you prefer to use HTTP instead (for example, if you are running Sematext Enterprise on premises or if you don't need metric data to be encrypted when being sent to Sematext over the internet), you can adjust that in /opt/spm/properties/spm-sender.properties by changing protocol to http in property:

spm_sender_receiver_url=https://spm-receiver.sematext.com/receiver/v1

Security

What information are SPM agents sending?

SPM agents are sending metrics and data used for filtering those metrics, such as hostnames (which can be obfuscated). To see what exactly is being sent you can use tcpdump or a similar tool to sniff the traffic. SPM agents ship data via HTTPS, but can also ship it via HTTP. Java-based agents let you change the protocol in appropriate files under /opt/spm/spm-sender/conf/ directory, while Node.js-based agents let you change it via the SPM_RECEIVER_URL environmental variable.

Can hostnames in Sematext Monitoring be obfuscated or customized?

Yes, you can obfuscate or alias hostnames starting with SPM client version 1.17.7. This lets you:

  • never send your real hostnames over the internet
  • use custom hostname in Sematext UI in case original hostname is too cryptic (e.g. have Sematext show "my-solr-host1" instead of "ip-12-123-321-123")

To achieve this, after SPM client is installed, open /opt/spm/properties/spm-sender.properties file and just add desired hostname to the value of property spm_sender_hostname_alias, e.g.

spm_sender_hostname_alias=web1.production.

After that, restart SPM monitor with:

sudo service spm-monitor restart

and restart any Java process which was using javaagent/in-process version of SPM monitor.

Note:

  • you can do this change at any point, even after SPM client was running on your machine for the past few months or years - you just have to upgrade SPM client to version 1.17.7 or greater
  • old data will still be seen in Sematext under the old hostname, while new data (after hostname change) will be displayed under the new hostname
  • if you are installing SPM client for the first time and you want to be 100% sure its original hostname never leaves your network, define your hostname alias in spm-sender.properties file immediately after you complete "1. Package installation" step and before you begin with "2. Client configuration setup" step (installation instructions can be accessed from https://apps.sematext.com/ui/monitoring, click Actions > Install Monitor on app you are installing)

Billing

How do you bill for infrastructure and server monitoring?

Usage is metered hourly on a per-agent basis. For example:

If you send metrics from a server A to Monitoring App Foo between 01:00 and 02:00 that's $0.035 for the Standard plan.

If another agent is monitoring something else, even if that is running on the same server A, and sending metrics to a different Monitoring App Bar, that's another $0.035.

If you are not sending metrics from a server A for a Monitoring App Foo between 02:00 and 03:00 then you pay $0 for that hour.

A single agent monitoring 24/7 will end up being ~ $25/month. If you run another agent on another server it will be 2 x ~ $25/mo.

How do you bill for Docker container monitoring?

Docker monitoring is based on the base price and per-container price. The base price includes monitoring of a Docker host and free monitoring of up to N containers. Per-container price is applied only if you run more than N containers per host. The number of containers per host is averaged for the whole account. The base price and the number of containers included in it depends on the plan. Note that monitoring of Docker host and containers is independent of monitoring of applications you run in those containers. Containerized applications monitored by Sematext are metered as separate hosts. In other words, whether the monitored application is running in a container or in a VM or directly on a server or in a public cloud instance is the same as far as metering and billing is concerned. For plans and price details see https://sematext.com/spm/pricing.

Which credit cards are accepted?

See billing FAQ.

Can I be invoiced instead of paying with a credit card?

See billing FAQ.

How often will I get billed?

See billing FAQ.

Can the billing email be sent to our Accounts Payable/Accounting instead of me?

See billing FAQ.

Do I have to commit or can I stop using Sematext at any time?

See billing FAQ.

Can I get invoices?

See billing FAQ.