LTTng: Difference between revisions
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Reboot with the vanilla kernel, you'll have to either change the default kernel flavour in /etc/update-extlinux.conf or uninstall the grsec kernel. Then build the LTTng modules from source. | Reboot with the vanilla kernel, you'll have to either change the default kernel flavour in /etc/update-extlinux.conf or uninstall the grsec kernel. Then build the LTTng modules from source. | ||
{{Cmd|wget | {{Cmd|wget https://lttng.org/files/lttng-modules/lttng-modules-latest-2.8.tar.bz2 | ||
tar xvf lttng-modules-latest-2.8.tar.bz2 | tar xvf lttng-modules-latest-2.8.tar.bz2 | ||
cd lttng-modules-* | cd lttng-modules-* | ||
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If you have an already running lttng-sessiond at this point, it will need to be restarted to enable kernel tracing. | If you have an already running lttng-sessiond at this point, it will need to be restarted to enable kernel tracing. | ||
For more information on kernel tracing, | For more information on kernel tracing, read [https://lttng.org/docs/#doc-tracing-the-linux-kernel Tracing the Linux kernel] in the lttng’s documentation. | ||
= Userspace tracing = | = Userspace tracing = | ||
The userspace tracing part of LTTng requires your application to be instrumented and linked with liblttng-ust, on Alpine you'll need the lttng-ust-dev package. | |||
{{Cmd|apk add lttng-ust-dev}} | {{Cmd|apk add lttng-ust-dev}} | ||
For more information on userspace tracing, | For more information on userspace tracing, read [https://lttng.org/docs/#doc-tracing-your-own-user-application Tracing your own user application] in the lttng’s documentation. | ||
[[Category:Monitoring]] | [[Category:Monitoring]] | ||
Latest revision as of 11:11, 7 August 2023
 Do not follow instructions here until this notice is removed. |
Installation
apk add lttng-tools
Kernel tracing
The kernel tracing part of LTTng requires out of tree modules to be built against the running kernel. These modules depend on the tracepoint facility which is disabled in the current Alpine Linux grsec kernel. However, the alternate vanilla kernel has all the required options built-in.
apk add linux-vanilla linux-vanilla-dev
Reboot with the vanilla kernel, you'll have to either change the default kernel flavour in /etc/update-extlinux.conf or uninstall the grsec kernel. Then build the LTTng modules from source.
wget https://lttng.org/files/lttng-modules/lttng-modules-latest-2.8.tar.bz2 tar xvf lttng-modules-latest-2.8.tar.bz2 cd lttng-modules-* make sudo make install sudo depmod
If you have an already running lttng-sessiond at this point, it will need to be restarted to enable kernel tracing.
For more information on kernel tracing, read Tracing the Linux kernel in the lttng’s documentation.
Userspace tracing
The userspace tracing part of LTTng requires your application to be instrumented and linked with liblttng-ust, on Alpine you'll need the lttng-ust-dev package.
apk add lttng-ust-dev
For more information on userspace tracing, read Tracing your own user application in the lttng’s documentation.