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Log collection
Overview
Collecting logs and reproducing issues slow down the diagnostics and degrade the user experience. Log collection is enabled for the Linux VDA by default.
Configuration
The ctxlogd daemon and the setlog utility are included in the Linux VDA release package. By default, the ctxlogd daemon starts after you install and configure the Linux VDA.
The ctxlogd daemon
All the other services that are traced depend on the ctxlogd daemon. You can stop the ctxlogd daemon if you do not want to keep the Linux VDA traced.
The setlog utility
Log collection is configured using the setlog utility, which is under the /opt/Citrix/VDA/bin/ path. Only the root user has the privilege to run it. You can use the GUI or run commands to view and change the configurations. Run the following command for help with the setlog utility:
setlog help
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Values
By default, Log Output Path is set to /var/log/xdl/hdx.log, Max Log Size is set to 200 MB, and you can save up to two old log files under Log Output Path.
View the current setlog values:
setlog values
log_path (Log Output Path) = /var/log/xdl/hdx.log
log_size (Max Log Size (MiB)) = 200
log_count (Max Old Log Files) = 2
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View or set a single setlog value:
setlog value <name> [<value>]
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For example:
setlog value log_size 100
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Levels
By default, log levels are set to warning (case-insensitive).
To view log levels set for different components, run the following command:
setlog levels
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To set log levels (including Disabled, Inherited, Verbose, Information, Warnings, Errors, and Fatal Errors), run the following command:
setlog level <class> [<level>]
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| Log Level | Command Parameter (Case-Insensitive) |
|---|---|
| Disabled | none |
| Inherited | inherit |
| Verbose | verbose |
| Information | info |
| Warnings | warning |
| Errors | error |
| Fatal Errors | fatal |
The <class> variable specifies one component of the Linux VDA. To cover all components, set it to all. For example:
setlog level all error
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Flags
By default, the flags are set as follows:
setlog flags
DATE = true
TIME = true
NAME = true
PID = true
TID = false
SID = true
UID = false
GID = false
CLASS = false
LEVEL = false
FUNC = true
FILE = false
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View the current flags:
setlog flags
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View or set a single log flag:
setlog flag <flag> [<state>]
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Restore Defaults
Revert all levels, flags, and values to the default settings:
setlog default
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Important:
The
ctxlogdservice is configured using the /var/xdl/.ctxlog file, which only root users can create. Other users do not have write permission to this file. We recommend that root users not give write permission to other users. Failure to comply can cause the arbitrary or malicious configuration toctxlogd, which can affect server performance and therefore the user experience.
Troubleshooting
The ctxlogd daemon fails and you cannot restart the ctxlogd service when the /var/xdl/.ctxlog file is missing (for example, accidentally deleted).
/var/log/messages:
Apr 1 02:28:21 RH72 citrix-ctxlogd[17881]: Failed to open logging configuration file.
Apr 1 02:28:21 RH72 systemd: ctxlogd.service: main process exited, code=exited, status=1/FAILURE
Apr 1 02:28:21 RH72 systemd: Unit ctxlogd.service entered failed state.
Apr 1 02:28:21 RH72 systemd: ctxlogd.service failed.
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To solve this issue, run setlog as a root user to recreate the /var/xdl/.ctxlog file. Then restart the ctxlogd service on which other services depend.
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