One problem with very supporting and protectiveĮnvironments is that the hard problems may be discovered too late orĪlso, a rare problem is harder to find than a frequent one Someone who avoids the simple problems may simply be heading forĪ not-so-simple one. As you protect people fromĭangers, they get themselves into new and less obvious problems. What people tend to miss, is that what I said there about C++ is toĮxtent true for all powerful languages. Yes, I said something like that (in 1986 or so). In the foot C++ makes it harder, but when you do it blows your whole There are undoubtedly more genuine quotes 'out there' but I can only confirm the ones I know of. Made up ones, misquote, and poor translations.Īlso, in some cases, I provide some context for a quote. My main motivation for posting this is to confirm genuine quotes so as to help people distinguish them from Defines the resource limit for RLIMIT_STACK that should be set at start-up.Here is a collection of quotes from my writings, talks, and interviews. Value cannot be set lower than the default 16 * 1024. Defines the resource limit for RLIMIT_NPROC that should be set at start-up. Defines the resource limit for RLIMIT_NOFILE that should be set at start-up. Defaults to false.Īdvanced sysconfig environment variables, defined in /etc/sysconfig/icinga2 (RHEL/SLES) or /etc/default/icinga2 (Debian/Ubuntu). Whether to attach a debugger when Icinga 2 crashes. The epoll interface is only supported on Linux. The name of the socket event engine, can be poll or epoll. Please only use them if advised by support or developers. Defaults to LocalStateDir + '/run'.Īdvanced runtime constants. Contains the path of the local state directory. Contains the path of the sysconf directory. Contains the installation prefix that was specified with cmake -DCMAKE_INSTALL_PREFIX. You don’t need themįor future builds and configuration based on the newly available constants above. The constants below have been used until Icinga v2.10, and are still intact. Defaults to PrefixDir + '/share/icinga2'. Contains the path of the package data directory. Contains the path of the Icinga 2 PID file. Contains the path of the Icinga 2 objects file. Contains the path of the Icinga 2 state file. To change them, as they are pre-compiled based on the constants above. In addition to that, the constants below are used to define specific file paths.

Writable constants can be specified on the CLI using the -define/-D parameter.ĭefault paths which include /etc and /var as base directory continue to workīased on the SysconfDir and LocalStateDir constants respectively. The name of the host Icinga was built on, e.g. The version of the compiler Icinga was built with, e.g. The name of the compiler Icinga was built with, e.g. The version of the operating system kernel, e.g. The name of the operating system kernel, e.g. The version of the operating system, e.g. Overrides the default value for the ApiListener bind_port attribute. Defaults to :: if IPv6 is supported by the operating system and to 0.0.0.0 otherwise. Overrides the default value for the ApiListener bind_host attribute.

The number of max checks run simultaneously. Defines the group the Icinga 2 daemon is running as. Defines the user the Icinga 2 daemon is running as. Included in the SNI host name for outbound connections. Defines the reload timeout for child processes. Contains a dictionary with global custom variables. Global Configuration Constants ¶ Constant Contains the path of the zones.d directory. Directory for PID files and sockets in daemon mode. Spool directory for certain data outputs.

These include directory paths, global configurationĪnd runtime parameters for the application version and (build) platform. Icinga 2 provides a number of special global constants. Constants cannot be changedīest practice is to manage constants in the nf file. Once defined a constant can be accessed from any file.

True & false (false), 3 & 7 (7), 0 & 7 (0)Ī reference to a value can be obtained using the & operator. Operatorġ + 3 (4), “hello ” + “world” (“hello world”) The operators are sorted by descending precedence. The following operators are supported in expressions. An array may simultaneously contain values of different types, such as

Definitin of indirection quotation