nixbld: add Nix 'networked' derivations

This obsoletes the fixed-output derivation hack previously used on Hydra, and the associated retry patch.
This commit is contained in:
Sebastien Bourdeauducq 2020-07-04 16:02:30 +08:00
parent 5e4582bebe
commit 805a3e33ad
3 changed files with 90 additions and 20 deletions

View File

@ -378,10 +378,15 @@ in
}; };
nixpkgs.config.packageOverrides = super: let self = super.pkgs; in { nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
nix = super.nix.overrideAttrs(oa: {
patches = oa.patches or [] ++ [ ./nix-networked-derivations.diff ];
});
nixFlakes = super.nixFlakes.overrideAttrs(oa: {
patches = oa.patches or [] ++ [ ./nix-networked-derivations.diff ];
});
hydra-unstable = super.hydra-unstable.overrideAttrs(oa: { hydra-unstable = super.hydra-unstable.overrideAttrs(oa: {
patches = oa.patches or [] ++ [ patches = oa.patches or [] ++ [
./hydra-conda.patch ./hydra-conda.patch
./hydra-retry.patch
./hydra-unbreak-sysbuild.patch ./hydra-unbreak-sysbuild.patch
./hydra-restrictdist.patch ./hydra-restrictdist.patch
]; ];

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@ -1,19 +0,0 @@
commit 86bf81c0b8a51bffa4b4b566e1caaac6f0e041d3
Author: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Thu Mar 14 17:45:32 2019 +0800
add option to disable retries on transient failures
diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
index 69c430eb..bdbc808d 100644
--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
@@ -344,7 +344,7 @@ void State::buildRemote(ref<Store> destStore,
break;
case BuildResult::TransientFailure:
result.stepStatus = bsFailed;
- result.canRetry = true;
+ result.canRetry = get(step->drv->env, "__hydraRetry").value_or("1") == "1";
result.errorMsg = "";
break;
case BuildResult::TimedOut:

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@ -0,0 +1,84 @@
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 53a0958a..16a98aec 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -809,9 +809,16 @@ private:
/* Whether this is a fixed-output derivation. */
bool fixedOutput;
+ bool networked;
+
/* Whether to run the build in a private network namespace. */
bool privateNetwork = false;
+ bool allowNetwork()
+ {
+ return fixedOutput || networked;
+ }
+
typedef void (DerivationGoal::*GoalState)();
GoalState state;
@@ -1179,6 +1186,8 @@ void DerivationGoal::haveDerivation()
{
trace("have derivation");
+ fixedOutput = drv->isFixedOutput();
+
retrySubstitution = false;
for (auto & i : drv->outputs)
@@ -1195,6 +1204,8 @@ void DerivationGoal::haveDerivation()
parsedDrv = std::make_unique<ParsedDerivation>(drvPath, *drv);
+ networked = parsedDrv->getBoolAttr("__networked");
+
/* We are first going to try to create the invalid output paths
through substitutes. If that doesn't work, we'll build
them. */
@@ -1987,7 +1998,7 @@ void DerivationGoal::startBuilder()
else if (settings.sandboxMode == smDisabled)
useChroot = false;
else if (settings.sandboxMode == smRelaxed)
- useChroot = !fixedOutput && !noChroot;
+ useChroot = !allowNetwork() && !noChroot;
}
if (worker.store.storeDir != worker.store.realStoreDir) {
@@ -2153,7 +2164,7 @@ void DerivationGoal::startBuilder()
"nogroup:x:65534:\n") % sandboxGid).str());
/* Create /etc/hosts with localhost entry. */
- if (!fixedOutput)
+ if (!allowNetwork())
writeFile(chrootRootDir + "/etc/hosts", "127.0.0.1 localhost\n::1 localhost\n");
/* Make the closure of the inputs available in the chroot,
@@ -2361,7 +2372,7 @@ void DerivationGoal::startBuilder()
us.
*/
- if (!fixedOutput)
+ if (!allowNetwork())
privateNetwork = true;
userNamespaceSync.create();
@@ -2573,7 +2584,7 @@ void DerivationGoal::initEnv()
to the builder is generally impure, but the output of
fixed-output derivations is by definition pure (since we
already know the cryptographic hash of the output). */
- if (fixedOutput) {
+ if (allowNetwork()) {
for (auto & i : parsedDrv->getStringsAttr("impureEnvVars").value_or(Strings()))
env[i] = getEnv(i).value_or("");
}
@@ -3184,7 +3195,7 @@ void DerivationGoal::runChild()
/* Fixed-output derivations typically need to access the
network, so give them access to /etc/resolv.conf and so
on. */
- if (fixedOutput) {
+ if (allowNetwork()) {
ss.push_back("/etc/resolv.conf");
// Only use nss functions to resolve hosts and