Joachim Wiberg
03a14bcaa5
Conditions in Finit are dependencies: if A is asserted, service B is
allowed to run. When A goes through FLUX (e.g., upstream reloads),
dependents are PAUSED and then simply resumed when the condition is
reasserted -- this is the correct behavior for barrier-style deps
like <pid/syslogd>.
However, some setups have tightly coupled services where dependents
must be reloaded/restarted when an upstream service reloads, not just
resumed. E.g., the FRR routing stack on Infix OS:
netd <pid/mgmtd> ← zebra <!pid/netd> ← {staticd,ripd} <!pid/zebra>
When netd reloads (SIGHUP), zebra and its dependents must be restarted
to pick up the new configuration.
The new '~' condition prefix marks a dependency as flux-sensitive:
service <!~pid/netd> name:zebra ...
When the upstream condition goes FLUX and returns to ON, the dependent
is reloaded (SIGHUP) or restarted (noreload '!') instead of merely
resumed. Transitivity follows naturally through the condition chain.
Closes #416
Closes #476
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Finit Test Suite
Finit comes with a set of tests and a small framework for running them. Contributors are encouraged to write new tests when implementing features, or fixing bugs.
Each test is run in isolation, in it's own namespace. Finit will therefore be able to be launched as PID 1. Since it's also running with it's own root directory it will be able to function properly without having any super user privileges in the host environment.
Running tests
To run the test suite, first build Finit, e.g:
./configure --prefix=/usr --exec-prefix= --sysconfdir=/etc --localstatedir=/var --enable-testserv-plugin
make -j9 clean all
Then run (parallel does not work atm):
make check
make check will set up the required assets for the test environment, and then
run the full set of tests. The environment is not removed afterwards so at
this point individual tests can be executed without having to run the entire
test suite, which is handy when developing new tests or debugging existing
test. To execute an individual test, simply invoke the script containing it:
./test/name-of-the-test.sh
Another way to run a single (or more) test(s) is to define the TESTS
environment variable:
TESTS="start-kill-service" make check