ci

README

CI (unit testing)

This README describes how the Core CI Tests Github Actions works, which provides Nomad with continuous integration unit testing.

Steps

1. When a branch is pushed, GHA triggers .github/workflows/test-core.yaml.

2. The first job is mods which creates a pre-cache of Go modules.

• Only useful for the followup jobs on Linux runners
• Is keyed on hash(go.sum), so a cache is re-used until deps are modified.

1. The checks, test-api, test-* jobs are started.

• The checks job runs make check
• The test job runs groups of tests, see below

3i. The check step also runs make missing

• Invokes tools/missing to scan ci/test-cores.json && nomad source.
• Fails the build if any packages in Nomad are not covered.

4a. The test-* jobs are run.

• Configured as a matrix of "groups"; each group is a set of packages.
• The GHA invokes test-nomad with $GOTEST_GROUP for each group.
• The makefile uses tools/missing to translate the group into packages
• Package groups are configured in ci/test-core.json

4b. The test-api job is run.

• Because api is a submodule, invokation of test command is special.
• The GHA invokes test-nomad-module with the name of the submodule.

1. The compile jobs are run

• Waits on checks to complete first
• Runs on each of linux, macos, windows

Documentation

Index

• Variables
• func Parallel(t *testing.T)
• func SkipSlow(t *testing.T, reason string)

Variables

var TinyChroot = map[string]string{

	"/usr/bin/sleep": "/bin/sleep",
	"/usr/bin/dash":  "/bin/sh",
	"/usr/bin/bash":  "/bin/bash",
	"/usr/bin/cat":   "/bin/cat",

	"/usr/bin/stty":   "/usr/bin/stty",
	"/usr/bin/head":   "/usr/bin/head",
	"/usr/bin/mktemp": "/usr/bin/mktemp",
	"/usr/bin/echo":   "/usr/bin/echo",
	"/usr/bin/touch":  "/usr/bin/touch",
	"/usr/bin/stat":   "/usr/bin/stat",

	"/etc/ld.so.cache":  "/etc/ld.so.cache",
	"/etc/ld.so.conf":   "/etc/ld.so.conf",
	"/etc/ld.so.conf.d": "/etc/ld.so.conf.d",
	"/etc/passwd":       "/etc/passwd",
	"/etc/resolv.conf":  "/etc/resolv.conf",

	"/lib":                 "/lib",
	"/lib32":               "/lib32",
	"/lib64":               "/lib64",
	"/usr/lib/jvm":         "/usr/lib/jvm",
	"/run/resolvconf":      "/run/resolvconf",
	"/run/systemd/resolve": "/run/systemd/resolve",
}

TinyChroot is useful for testing, where we do not use anything other than trivial /bin commands like sleep and sh. Copying a minimal chroot helps in environments like GHA with very poor [network] disk performance.

Note that you cannot chroot a symlink.

Do not modify this value.

Functions

func Parallel

func Parallel(t *testing.T)

Parallel runs t in parallel, unless CI is set to a true value.

In CI (CircleCI / GitHub Actions) we get better performance by running tests in serial while not restricting GOMAXPROCS.

func SkipSlow

func SkipSlow(t *testing.T, reason string)

SkipSlow skips a slow test unless NOMAD_SLOW_TEST is set to a true value.