Sometimes we should turn off IPv6

samantehrani · May 22, 2017 · 8aed038 · 8aed038
1 parent 812ad55
commit 8aed038
Show file tree

Hide file tree

Showing 2 changed files with 13 additions and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -48,6 +48,11 @@ matrix:
       env: TOXENV=txchecker-travis-required
     - python: 3.5
       env: TOXENV=txchecker-travis-all
+    # We need a builder without IPv6. This is going to be slower than all the
+    # others, but that's ok.
+    - python: 3.5
+      env: TOXENV=py35-alldeps-withcov-posix,codecov-publish DISABLE_IPV6=yes
+      sudo: true
   allow_failures:
     - env: TOXENV=txchecker-travis-all
     - env: TOXENV=pyflakes3

diff --git a/.travis/install.sh b/.travis/install.sh
@@ -24,6 +24,14 @@ if [[ "$(uname -s)" == 'Darwin' ]]; then
     fi
 fi
 
+# We need to test on machines that do not have IPv6, because this is a
+# supported configuration and we've broken our tests for this in the past.
+# See https://twistedmatrix.com/trac/ticket/9144
+if [[ "${DISABLE_IPV6}" = "yes" ]]; then
+    sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
+    sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
+fi
+
 # Temporary workaround for https://github.com/pypa/setuptools/issues/776;
 # install (and thereby cache a built wheel of) cryptography.  (NB: We're
 # already using the same Python version in this venv as in the test env,