59 lines
1.9 KiB
ReStructuredText
59 lines
1.9 KiB
ReStructuredText
Bare Metal Service state report (via Guru Meditation Reports)
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=============================================================
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The Bare Metal service contains a mechanism whereby developers and system
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administrators can generate a report about the state of running Bare Metal
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executables (ironic-api and ironic-conductor). This report is called a Guru
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Meditation Report (GMR for short).
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GMR provides useful debugging information that can be used to obtain
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an accurate view on the current live state of the system. For example,
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what threads are running, what configuration parameters are in effect,
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and more. The eventlet backdoor facility provides an interactive shell
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interface for any eventlet based process, allowing an administrator to
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telnet to a pre-defined port and execute a variety of commands.
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Generating a GMR
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----------------
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A *GMR* can be generated by sending the *USR2* signal to any Bare Metal process
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that supports it. The *GMR* will then be output to stderr for that particular
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process. For example:
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Suppose that ``ironic-api`` has process ID ``6385``, and was run with
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``2>/var/log/ironic/ironic-api-err.log``. Then, sending the *USR* signal::
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kill -USR2 6385
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will trigger the Guru Meditation report to be printed to
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``/var/log/ironic/ironic-api-err.log``.
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Structure of a GMR
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------------------
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The *GMR* consists of the following sections:
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Package
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Shows information about the package to which this process belongs, including
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version information.
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Threads
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Shows stack traces and thread IDs for each of the threads within this
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process.
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Green Threads
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Shows stack traces for each of the green threads within this process (green
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threads don't have thread IDs).
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Configuration
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Lists all the configuration options currently accessible via the CONF object
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for the current process.
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Sample GMR Report
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-----------------
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Below is a sample GMR report generated for ``ironic-api`` service:
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.. include:: report.txt
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:literal:
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