SPM FAQ

• never send your real hostnames over the Internet
• use custom hostname in SPM UI in case original hostname is too cryptic (e.g. have SPM shows "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.

After that, restart SPM sender with sudo /etc/init.d/spm-sender restart

Few notes to keep in mind:

• 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 SPM under the old hostname, while new data (after hostname change) will be displayed under the new hostname
• if you are installing SPM client on some machine 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 described on page http://apps.sematext.com/spm-reports/client.do.

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 SPM applications. 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 variant, run: sudo /etc/init.d/spm-monitor restart , otherwise restart your application/java process.

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

A: Yes. There are really 2 different scenarios here:

1) If each of those applications should be monitored under a different SPM application (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 SPM application of Solr or SolrCloud type, while the Java app would be monitored with SPM application of JVM type), just complete all installation steps from http://apps.sematext.com/spm-reports/client.do for each of them separately.

2) If you want them monitored under the same SPM application (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 on http://apps.sematext.com/spm-reports/client.do 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. 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 SPM to monitor my service which runs on Windows or Mac OS X?

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 SPM 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), following steps from http://apps.sematext.com/spm-reports/client.do . 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 SPM 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 at http://apps.sematext.com/spm-reports/client.do 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 installed on a single Linux helper box. Just do this:

• Create a separate SPM application in SPM UI (https://apps.sematext.com/spm-reports/registerApplication.do) for each of the machines which should be monitored
• For each of those SPM applications (and your monitored machines), go through installation process described in http://apps.sematext.com/spm-reports/client.do . Note: Since each SPM application 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.

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.  At Sematext we use Embedded monitor in almost all cases and use Standalone mode only for monitoring non-Java applications like MySQL and Apache. 

Can I move SPM client to different directory?

Yes. Starting with version 1.22.3, SPM client provides a script one can use to move SPM client files/directories to another location. 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

I am using SPM for Solr and I don't see any data on Solr and JVM reports, what is the problem?

You should probably enable JMX in your Solr. Add or uncomment the <jmx /> directive in solrconfig.xml and restart Solr.  See http://wiki.apache.org/solr/SolrJmx for more info.

1. Log into your monitored servers and make sure Collectd and SPM Sender are running.
2. Check if system time is correct. If not, you should adjust the time, restart the SPM Sender with:
   

   sudo /etc/init.d/spm-sender restart

   and restart SPM Monitor by restarting your server which is being monitored (in case in-process/javaagent variant of SPM Monitor) or (in case of standalone SPM Monitor installation):

   sudo /etc/init.d/spm-monitor restart

3. Make sure disks are not full.

4. Make sure user spmsender can have more than 1024 files open:
   
   

   sudo vim /etc/security/limits.conf
   spmsender     -    nofile    32000
   
   sudo vim /etc/pam.d/su
   session    required   pam_limits.so

   Restart SPM Sender after the above changes.

5. Check if hostname of your server is defined in /etc/hosts
6. 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
7. If none of the suggestions helped, run sudo bash /opt/spm/bin/spm-client-diagnostics.sh to generate diagnostics package and send it to spm-support@sematext.com

1. Make sure Collectd is running: sudo service collectd restart. Make sure Collectd is set up to start at boot.
2. Make sure SPM Sender is running: sudo /etc/init.d/spm-sender restart
3. Make sure disk is not full: df -h
4. 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?"

sudo /etc/init.d/spm-sender restart

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

A: Yes. Since version 1.22.0, SPM sender by default uses HTTPS to send metrics data to Sematext servers. If you prefer to use HTTP instead (for example, if you are running SPM on premises or if you don't need metric data to be encrypted when being sent to SPM 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

Can SPM collect metrics even when Elasticsearch HTTP API is disabled?

http.host: "127.0.0.1"

Upgrading

How do I upgrade the SPM client?

A: If you have previously installed the SPM client package (RPM, Deb, etc.) as described on https://apps.sematext.com/spm-reports/client.do simply upgrade via apt-get (Debian, Ubuntu, etc.), or yum (RedHat, CentOS, etc.), or zypper (SuSE):

sudo apt-get update && sudo apt-get install spm-client
sudo yum update spm-client
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, 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 /etc/init.d/spm-monitor restart

If you used bash script based installer, then just run the installation command again ("curl -ko installer.sh ...." or "wget --no-check-certificate -O installer.sh ..."). There is no need to go through "Client configuration setup" steps from https://apps.sematext.com/spm-reports/client.do since the existing configuration will be preserved.

After that is done, next step is the same as with apt-get/yum/zipper upgrade - you should restart monitored server (if using in-process/javaagent monitor) or standalone SPM monitor.

Uninstalling

How do I uninstall the SPM client?

A: 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 on http://apps.sematext.com/spm-reports/client.do , 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.

Billing

Which credit cards are accepted?

A: We accept all major credit cards - Visa, MasterCard, American Express, JCB, Discover, and Diners Club.

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

A: Yes, we offer a pre-payment option.  When you select this option just email us and tell us how much you want to pre-pay.  We'll invoice you and once we receive your payment we'll enter in the system and you'll be good to go.  Every month when we do the billing we'll subtract your usage cost for the previous month from your balance in our system.  We'll notify you before your balance gets too low, so that we can repeat the invoicing process.

How often will I get billed?

A: We bill on a monthly basis and send an email to notify you of the amount.

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

A: Yes, when you select your plan and payment method you will also be able to enter an alternative billing email address.

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

A: There is no commitment and no contract. When/if you want to stop using SPM you simply stop sending us your metrics and/or switch to the Free plan.