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Add a ca-derivations required machine feature

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Make ca-derivations require a `ca-derivations` machine feature, and
ca-aware builders expose it.

That way, a network of builders can mix ca-aware and non-ca-aware
machines, and the scheduler will send them in the right place.
This commit is contained in:
regnat 2021-06-11 08:37:59 +02:00
parent 8e6ee1b9e9
commit 7c077d2a0f
5 changed files with 22 additions and 4 deletions
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2
src/libstore/parsed-derivations.cc
View file

@ -91,6 +91,8 @@ StringSet ParsedDerivation::getRequiredSystemFeatures() const
StringSet res;
for (auto & i : getStringsAttr("requiredSystemFeatures").value_or(Strings()))
res.insert(i);
if (!derivationHasKnownOutputPaths(drv.type()))
res.insert("ca-derivations");
return res;
}

7
src/libstore/store-api.cc
View file

@ -337,6 +337,13 @@ ValidPathInfo Store::addToStoreSlow(std::string_view name, const Path & srcPath,
return info;
}
StringSet StoreConfig::getDefaultSystemFeatures()
{
auto res = settings.systemFeatures.get();
if (settings.isExperimentalFeatureEnabled("ca-derivations"))
res.insert("ca-derivations");
return res;
}
Store::Store(const Params & params)
: StoreConfig(params)

4
src/libstore/store-api.hh
View file

@ -180,6 +180,8 @@ struct StoreConfig : public Config
StoreConfig() = delete;
StringSet getDefaultSystemFeatures();
virtual ~StoreConfig() { }
virtual const std::string name() = 0;
@ -196,7 +198,7 @@ struct StoreConfig : public Config
Setting<bool> wantMassQuery{this, false, "want-mass-query", "whether this substituter can be queried efficiently for path validity"};
Setting<StringSet> systemFeatures{this, settings.systemFeatures,
Setting<StringSet> systemFeatures{this, getDefaultSystemFeatures(),
"system-features",
"Optional features that the system this store builds on implements (like \"kvm\")."};

2
tests/build-remote-content-addressed-floating.sh
View file

@ -4,4 +4,6 @@ file=build-hook-ca-floating.nix
sed -i 's/experimental-features .*/& ca-derivations/' "$NIX_CONF_DIR"/nix.conf
CONTENT_ADDRESSED=true
source build-remote.sh

11
tests/build-remote.sh
View file

@ -6,12 +6,17 @@ unset NIX_STATE_DIR
function join_by { local d=$1; shift; echo -n "$1"; shift; printf "%s" "${@/#/$d}"; }
EXTRA_SYSTEM_FEATURES=()
if [[ -n "$CONTENT_ADDRESSED" ]]; then
EXTRA_SYSTEM_FEATURES=("ca-derivations")
fi
builders=(
# system-features will automatically be added to the outer URL, but not inner
# remote-store URL.
"ssh://localhost?remote-store=$TEST_ROOT/machine1?system-features=foo - - 1 1 foo"
"$TEST_ROOT/machine2 - - 1 1 bar"
"ssh-ng://localhost?remote-store=$TEST_ROOT/machine3?system-features=baz - - 1 1 baz"
"ssh://localhost?remote-store=$TEST_ROOT/machine1?system-features=$(join_by "%20" foo ${EXTRA_SYSTEM_FEATURES[@]}) - - 1 1 $(join_by "," foo ${EXTRA_SYSTEM_FEATURES[@]})"
"$TEST_ROOT/machine2 - - 1 1 $(join_by "," bar ${EXTRA_SYSTEM_FEATURES[@]})"
"ssh-ng://localhost?remote-store=$TEST_ROOT/machine3?system-features=$(join_by "%20" baz ${EXTRA_SYSTEM_FEATURES[@]}) - - 1 1 $(join_by "," baz ${EXTRA_SYSTEM_FEATURES[@]})"
)
chmod -R +w $TEST_ROOT/machine* || true