schema: Enlarge Command Argument and Environment Key #792
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From the beginning, the Icinga DB schema allowed 64 characters for both
the command arguments and environment variable names[0]. In particular,
this affects CheckCommand, EventCommand and NotificationCommand Icinga 2
objects.
But if a command with either an argument key or an environment variable
that is longer than 64 characters was defined in Icinga 2, Icinga DB
will try to insert it into the database and may end up crashing.
Although it may seem large enough, it is sometimes exceeded.
After evaluating that there was no technical limitation[1], the limit
was increased to 255 characters. This limit was chosen over the wider
text type as it allows indexes in the future and requires less space.
For example, the following CheckCommand was not possible before:
> object CheckCommand "icingadb-i791" {
> import "plugin-check-command"
> command = [ "/bin/true" ]
> env = {
> "THAT_ARE_64_AS_WOW_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" = "huhu"
> }
> arguments = {
> "java.class.that.was.used.as.an.argument.that.was.eighty.seven.characters.long.and.broke" = {
> value = "F"
> }
> }
> }
Another thing was a type difference between the MySQL and PostgreSQL
schemas. While the MySQL schema defined argument_key_override as
varchar(64), in PostgreSQL it was a citext. So it was changed to
varchar(255) in MySQL and kept as it was in PostgreSQL.
Closes #791.
[0]: 05d5e97
[1]: #791 (comment)
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lippserd
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Aug 26, 2024
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From the beginning, the Icinga DB schema allowed 64 characters for both the command arguments and environment variable names. In particular, this affects
CheckCommand,EventCommandandNotificationCommandIcinga 2 objects.But if a command with either an argument key or an environment variable that is longer than 64 characters was defined in Icinga 2, Icinga DB will try to insert it into the database and may end up crashing. Although it may seem large enough, it is sometimes exceeded.
After evaluating that there was no technical limitation, the limit was increased to 255 characters. This limit was chosen over the wider
texttype as it allows indexes in the future and requires less space.For example, the following
CheckCommandwas not possible before:Another thing was a type difference between the MySQL and PostgreSQL schemas. While the MySQL schema defined
argument_key_overrideasvarchar(64), in PostgreSQL it was acitext. So it was changed tovarchar(255)in MySQL and kept as it was in PostgreSQL.Closes #791.