tests: use non-root SSH user to connect to Docker image in ansible_test.

.travis/ansible_tests.sh

@@ -6,6 +6,12 @@ TMPDIR="/tmp/ansible-tests-$$"
 ANSIBLE_VERSION="${ANSIBLE_VERSION:-2.4.3.0}"
 MITOGEN_TEST_DISTRO="${MITOGEN_TEST_DISTRO:-debian}"
 
+export PYTHONPATH="${PYTHONPATH}:${TRAVIS_BUILD_DIR}"
+
+# SSH passes these through to the container when run interactively, causing
+# stdout to get messed up with libc warnings.
+unset LANG LC_ALL
+
 function on_exit()
 {
     rm -rf "$TMPDIR"
@@ -17,7 +23,14 @@ mkdir "$TMPDIR"
 
 
 echo travis_fold:start:docker_setup
-docker run --rm --detach --name=target d2mw/mitogen-${MITOGEN_TEST_DISTRO}-test /bin/sleep 86400
+DOCKER_HOSTNAME="$(python ${TRAVIS_BUILD_DIR}/tests/show_docker_hostname.py)"
+
+docker run \
+    --rm \
+    --detach \
+    --publish 0.0.0.0:2201:22/tcp \
+    --name=target \
+    d2mw/mitogen-${MITOGEN_TEST_DISTRO}-test
 echo travis_fold:end:docker_setup
 
 
@@ -25,9 +38,15 @@ echo travis_fold:start:job_setup
 pip install -U ansible=="${ANSIBLE_VERSION}"
 cd ${TRAVIS_BUILD_DIR}/tests/ansible
 
-cat >> ${TMPDIR}/hosts <<-EOF
-target ansible_connection=docker ansible_python_interpreter=/usr/bin/python2.7
-EOF
+echo \
+    target \
+    ansible_host=$DOCKER_HOSTNAME \
+    ansible_port=2201 \
+    ansible_python_interpreter=/usr/bin/python2.7 \
+    ansible_user=mitogen__has_sudo_pubkey \
+    ansible_become_pass=has_sudo_pubkey_password \
+    ansible_ssh_private_key_file=${TRAVIS_BUILD_DIR}/tests/data/docker/mitogen__has_sudo_pubkey.key \
+    >> ${TMPDIR}/hosts
 echo travis_fold:end:job_setup