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2014-02-10 Move StoreApi::serve into opServeShea Levy2-38/+0
Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-10 Pass in params by const refShea Levy2-2/+2
Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-08 Add download-via-ssh substituterShea Levy2-0/+26
This substituter connects to a remote host, runs nix-store --serve there, and then forwards substituter commands on to the remote host and sends their results to the calling program. The ssh-substituter-hosts option can be specified as a list of hosts to try. This is an initial implementation and, while it works, it has some limitations: * Only the first host is used * There is no caching of query results (all queries are sent to the remote machine) * There is no informative output (such as progress bars) * Some failure modes may cause unhelpful error messages * There is no concept of trusted-ssh-substituter-hosts Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-08 nix-store --serve: Flush out after every loopShea Levy2-2/+3
Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-08 nix-store --serve: Use dump instead of exportShea Levy2-3/+4
Also remove signing support Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-08 nix-store --serve: Don't fail if asked for info about non-valid pathShea Levy1-0/+2
Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-08 nix-store --serve: Don't loop foreverShea Levy1-26/+25
nix-store --export takes a tmproot, which can only release by exiting. Substituters don't currently work in a way that could take advantage of the looping, anyway. Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-08 Add the nix-store --serve commandShea Levy2-0/+35
This is essentially the substituter API operating on the local store, which will be used by the ssh substituter. It runs in a loop rather than just taking one command so that in the future nix will be able to keep one connection open for multiple instances of the substituter. Signed-off-by: Shea Levy <shea@shealevy.com>
2014-02-03 Fix assertion failure in ‘nix-store --load-db’Eelco Dolstra1-1/+12
Namely: nix-store: derivations.cc:242: nix::Hash nix::hashDerivationModulo(nix::StoreAPI&, nix::Derivation): Assertion `store.isValidPath(i->first)' failed. This happened because of the derivation output correctness check being applied before the references of a derivation are valid.
2014-02-01 Give a friendly error message if the DB directory is not writableEelco Dolstra1-2/+6
Previously we would say "error: setting synchronous mode: unable to open database file" which isn't very helpful.
2014-02-01 Fix "make dist"Eelco Dolstra1-1/+3
2014-02-01 Remove AutomakefilesEelco Dolstra1-33/+0
2014-02-01 Update Makefile variable namesEelco Dolstra1-1/+1
2014-01-30 Rename Makefile -> local.mkEelco Dolstra1-0/+0
2014-01-21 Fix some clang warningsEelco Dolstra2-6/+1
2014-01-21 Merge branch 'master' into makeEelco Dolstra2-2/+7
Conflicts: src/libexpr/eval.cc
2014-01-09 Generate schema.sql.hhEelco Dolstra1-0/+5
2014-01-09 Update MakefilesEelco Dolstra1-3/+1
2014-01-08 Fix checking of NAR hashesEelco Dolstra1-0/+1
*headdesk* *headdesk* *headdesk* So since commit 22144afa8d9f8968da351618a1347072a93bd8aa, Nix hasn't actually checked whether the content of a downloaded NAR matches the hash specified in the manifest / NAR info file. Urghhh...
2014-01-06 wordingDomen Kožar1-1/+1
2013-12-10 Garbage collector: Release locks on temporary root filesEelco Dolstra1-0/+1
This allows processes waiting for such locks to proceed during the trash deletion phase of the garbage collector.
2013-12-05 Print a trace message if a build fails due to the platform being unknownEelco Dolstra1-1/+4
2013-11-25 Rename Makefile.new -> MakefileEelco Dolstra1-0/+0
2013-11-23 Use libnix as a prefix for all Nix librariesEelco Dolstra1-0/+2
In particular "libutil" was always a problem because it collides with Glibc's libutil. Even if we install into $(libdir)/nix, the linker sometimes got confused (e.g. if a program links against libstore but not libutil, then ld would report undefined symbols in libstore because it was looking at Glibc's libutil).
2013-11-23 Allow (dynamic) libraries to depend on other librariesEelco Dolstra1-0/+2
2013-11-22 Drop the dependency on AutomakeEelco Dolstra2-2/+2
2013-11-22 Rename $(here) to $(d) for brevity, and remove trailing slashEelco Dolstra1-1/+1
2013-11-22 Add ‘make dist’ supportEelco Dolstra1-1/+1
2013-11-22 New non-recursive, plain Make-based build systemEelco Dolstra1-0/+19
2013-11-22 Include <cstring> for memsetEelco Dolstra1-0/+1
This should fix building on Illumos.
2013-11-14 Remove nix-setuid-helperEelco Dolstra4-158/+31
AFAIK, nobody uses it, it's not maintained, and it has no tests.
2013-11-12 Make function calls show up in stack traces againEelco Dolstra2-0/+4
Note that adding --show-trace prevents functions calls from being tail-recursive, so an expression that evaluates without --show-trace may fail with a stack overflow if --show-trace is given.
2013-10-22 For auto roots, show the intermediate linkEelco Dolstra1-1/+1
I.e. "nix-store -q --roots" will now show (for example) /home/eelco/Dev/nixpkgs/result rather than /nix/var/nix/gcroots/auto/53222qsppi12s2hkap8dm2lg8xhhyk6v
2013-10-16 Retry all SQLite operationsEelco Dolstra2-128/+169
To deal with SQLITE_PROTOCOL, we also need to retry read-only operations.
2013-10-16 Fix a race in registerFailedPath()Eelco Dolstra1-2/+1
Registering the path as failed can fail if another process does the same thing after the call to hasPathFailed(). This is extremely unlikely though.
2013-10-16 Convenience macros for retrying a SQLite transactionEelco Dolstra1-46/+42
2013-10-16 Don't wrap read-only queries in a transactionEelco Dolstra1-6/+0
There is no risk of getting an inconsistent result here: if the ID returned by queryValidPathId() is deleted from the database concurrently, subsequent queries involving that ID will simply fail (since IDs are never reused).
2013-10-16 Print a distinct warning for SQLITE_PROTOCOLEelco Dolstra1-4/+8
2013-10-16 Treat SQLITE_PROTOCOL as SQLITE_BUSYEelco Dolstra1-1/+1
In the Hydra build farm we fairly regularly get SQLITE_PROTOCOL errors (e.g., "querying path in database: locking protocol"). The docs for this error code say that it "is returned if some other process is messing with file locks and has violated the file locking protocol that SQLite uses on its rollback journal files." However, the SQLite source code reveals that this error can also occur under high load: if( cnt>5 ){ int nDelay = 1; /* Pause time in microseconds */ if( cnt>100 ){ VVA_ONLY( pWal->lockError = 1; ) return SQLITE_PROTOCOL; } if( cnt>=10 ) nDelay = (cnt-9)*238; /* Max delay 21ms. Total delay 996ms */ sqlite3OsSleep(pWal->pVfs, nDelay); } i.e. if certain locks cannot be not acquired, SQLite will retry a number of times before giving up and returing SQLITE_PROTOCOL. The comments say: Circumstances that cause a RETRY should only last for the briefest instances of time. No I/O or other system calls are done while the locks are held, so the locks should not be held for very long. But if we are unlucky, another process that is holding a lock might get paged out or take a page-fault that is time-consuming to resolve, during the few nanoseconds that it is holding the lock. In that case, it might take longer than normal for the lock to free. ... The total delay time before giving up is less than 1 second. On a heavily loaded machine like lucifer (the main Hydra server), which often has dozens of processes waiting for I/O, it seems to me that a page fault could easily take more than a second to resolve. So, let's treat SQLITE_PROTOCOL as SQLITE_BUSY and retry the transaction. Issue NixOS/hydra#14.
2013-09-06 Don't apply the CPU affinity hack to nix-shell (and other Perl programs)Eelco Dolstra3-1/+5
As discovered by Todd Veldhuizen, the shell started by nix-shell has its affinity set to a single CPU. This is because nix-shell connects to the Nix daemon, which causes the affinity hack to be applied. So we turn this off for Perl programs.
2013-09-02 Only show trace messages when tracing is enabledEelco Dolstra1-4/+3
2013-09-02 Add an option to limit the log output of buildersEelco Dolstra3-0/+19
This is mostly useful for Hydra to deal with builders that get stuck in an infinite loop writing data to stdout/stderr.
2013-08-26 Fix typos, especially those that end up in the Nix manualIvan Kozik2-2/+2
2013-08-26 Fix personality switching from x86_64 to i686Gergely Risko1-1/+6
On Linux, Nix can build i686 packages even on x86_64 systems. It's not enough to recognize this situation by settings.thisSystem, we also have to consult uname(). E.g. we can be running on a i686 Debian with an amd64 kernel. In that situation settings.thisSystem is i686-linux, but we still need to change personality to i686 to make builds consistent.
2013-08-07 Run the daemon worker on the same CPU as the clientEelco Dolstra4-2/+19
On a system with multiple CPUs, running Nix operations through the daemon is significantly slower than "direct" mode: $ NIX_REMOTE= nix-instantiate '<nixos>' -A system real 0m0.974s user 0m0.875s sys 0m0.088s $ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system real 0m2.118s user 0m1.463s sys 0m0.218s The main reason seems to be that the client and the worker get moved to a different CPU after every call to the worker. This patch adds a hack to lock them to the same CPU. With this, the overhead of going through the daemon is very small: $ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system real 0m1.074s user 0m0.809s sys 0m0.098s
2013-07-18 Revert "build-remote.pl: Enforce timeouts locally"Eelco Dolstra1-1/+3
This reverts commit 69b8f9980f39c14a59365a188b300a34d625a2cd. The timeout should be enforced remotely. Otherwise, if the garbage collector is running either locally or remotely, if will block the build or closure copying for some time. If the garbage collector takes too long, the build may time out, which is not what we want. Also, on heavily loaded systems, copying large paths to and from the remote machine can take a long time, also potentially resulting in a timeout.
2013-07-15 Allow bind-mounting regular files into the chrootShea Levy1-1/+9
mount(2) with MS_BIND allows mounting a regular file on top of a regular file, so there's no reason to only bind directories. This allows finer control over just which files are and aren't included in the chroot without having to build symlink trees or the like. Signed-off-by: Shea Levy <shea@shealevy.com>
2013-07-12 Garbage collector: Don't follow symlinks arbitrarilyEelco Dolstra2-45/+40
Only indirect roots (symlinks to symlinks to the Nix store) are now supported.
2013-06-20 Don't set $preferLocalBuild and $requiredSystemFeatures in buildersEelco Dolstra2-8/+15
With C++ std::map, doing a comparison like ‘map["foo"] == ...’ has the side-effect of adding a mapping from "foo" to the empty string if "foo" doesn't exist in the map. So we ended up setting some environment variables by accident.
2013-06-20 Don't substitute derivations that have preferLocalBuild setEelco Dolstra3-7/+15
In particular this means that "trivial" derivations such as writeText are not substituted, reducing the number of GET requests to the binary cache by about 200 on a typical NixOS configuration.
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