1. 08 Jan, 2016 3 commits
    • antirez's avatar
      Another typo in protected mode error message. · d256abe9
      antirez authored
      d256abe9
    • antirez's avatar
      Fix protected mode error message typo. · 06846152
      antirez authored
      06846152
    • antirez's avatar
      New security feature: Redis protected mode. · 273c49e7
      antirez authored
      An exposed Redis instance on the internet can be cause of serious
      issues. Since Redis, by default, binds to all the interfaces, it is easy
      to forget an instance without any protection layer, for error.
      
      Protected mode try to address this feature in a soft way, providing a
      layer of protection, but giving clues to Redis users about why the
      server is not accepting connections.
      
      When protected mode is enabeld (the default), and if there are no
      minumum hints about the fact the server is properly configured (no
      "bind" directive is used in order to restrict the server to certain
      interfaces, nor a password is set), clients connecting from external
      intefaces are refused with an error explaining what to do in order to
      fix the issue.
      
      Clients connecting from the IPv4 and IPv6 lookback interfaces are still
      accepted normally, similarly Unix domain socket connections are not
      restricted in any way.
      273c49e7
  2. 06 Jan, 2016 1 commit
    • antirez's avatar
      Cluster: don't send -ASK to MIGRATE. · b18e42b2
      antirez authored
      For non existing keys, we don't want to send -ASK redirections to
      MIGRATE, since when moving slots from the migrating node to the
      importing node, we want just to ignore keys that are no longer there.
      They may be expired or deleted between the GETKEYSINSLOT call and the
      MIGRATE call. Otherwise this causes an error during migrations with
      redis-trib (or equivalent cluster management tools).
      b18e42b2
  3. 02 Jan, 2016 2 commits
  4. 29 Dec, 2015 1 commit
  5. 23 Dec, 2015 3 commits
  6. 22 Dec, 2015 2 commits
  7. 18 Dec, 2015 4 commits
  8. 17 Dec, 2015 11 commits
    • antirez's avatar
      Cluster: resharding test now checks AOF consistency. · cd29e7be
      antirez authored
      It's a key invariant that when AOF is enabled, after the cluster
      reshards, a crash-recovery event causes all the keys to be still fine
      with the expected logical content. Now this is part of unit 04.
      cd29e7be
    • antirez's avatar
      Fix a race that may lead to the active (slave) client to be freed. · 7a7e46b2
      antirez authored
      In issue #2948 a crash was reported in processCommand(). Later Oran Agra
      (@oranagra) traced the bug (in private chat) in the following sequence
      of events:
      
      1. Some maxmemory is set.
      2. The slave is the currently active client and is executing PING or
         REPLCONF or whatever a slave can send to its master.
      3. freeMemoryIfNeeded() is called since maxmemory is set.
      4. flushSlavesOutputBuffers() is called by freeMemoryIfNeeded().
      5. During slaves buffers flush, a write error could be encoutered in
         writeToClient() or sendReplyToClient() depending on the version of
         Redis. This will trigger freeClient() against the currently active
         client, so a segmentation fault will likely happen in
         processCommand() immediately after the call to freeMemoryIfNeeded().
      
      There are different possible fixes:
      
      1. Add flags to writeToClient() (recent versions code base) so that
         we can ignore the write errors, and use this flag in
         flushSlavesOutputBuffers(). However this is not simple to do in older
         versions of Redis.
      2. Use freeClientAsync() during write errors. This works but changes the
         current behavior of releasing clients ASAP when possible. Normally
         we write to clients during the normal event loop processing, in the
         writable client, where there is no active client, so no care must be
         taken.
      3. The fix of this commit: to detect that the current client is no
         longer valid. This fix is a bit "ad-hoc", but works across all the
         versions and has the advantage of not changing the remaining
         behavior. Only alters what happens during this race condition,
         hopefully.
      7a7e46b2
    • antirez's avatar
      Fix processCommand() comment about return value. · f50dfff0
      antirez authored
      f50dfff0
    • antirez's avatar
      Hopefully better memory test on crash. · fc00042e
      antirez authored
      The old test, designed to do a transformation on the bits that was
      invertible, in order to avoid touching the original memory content, was
      not effective as it was redis-server --test-memory. The former often
      reported OK while the latter was able to spot the error.
      
      So the test was substituted with one that may perform better, however
      the new one must backup the memory tested, so it tests memory in small
      pieces. This limits the effectiveness because of the CPU caches. However
      some attempt is made in order to trash the CPU cache between the fill
      and the check stages, but not for the addressing test unfortunately.
      
      We'll see if this test will be able to find errors where the old failed.
      fc00042e
    • antirez's avatar
      Suppress harmless warnings. · ef92f90d
      antirez authored
      ef92f90d
    • antirez's avatar
      4fee3903
    • antirez's avatar
      Crash report format improvements. · f034a075
      antirez authored
      f034a075
    • antirez's avatar
    • antirez's avatar
      8bc75fc1
    • antirez's avatar
      b8373fb4
    • antirez's avatar
      1ae68665
  9. 15 Dec, 2015 1 commit
  10. 14 Dec, 2015 1 commit
  11. 13 Dec, 2015 7 commits
  12. 11 Dec, 2015 3 commits
  13. 10 Dec, 2015 1 commit
    • antirez's avatar
      Cluster: more reliable migration tests. · 7399195c
      antirez authored
      The old version was modeled with two failovers, however after the first
      it is possible that another slave will migrate to the new master, since
      for some time the new master is not backed by any slave. Probably there
      should be some pause after a failover, before the migration. Anyway the
      test is simpler in this way, and depends less on timing.
      7399195c