Add config files for linux_extra artifacts
diff --git a/tools/internal_ci/linux/grpc_build_artifacts_extra.cfg b/tools/internal_ci/linux/grpc_build_artifacts_extra.cfg
new file mode 100644
index 0000000..619e3ea
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_build_artifacts_extra.cfg
@@ -0,0 +1,26 @@
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Config file for the internal CI (in protobuf text format)
+
+# Location of the continuous shell script in repository.
+build_file: "grpc/tools/internal_ci/linux/grpc_build_artifacts_extra.sh"
+timeout_mins: 240
+action {
+ define_artifacts {
+ regex: "**/*sponge_log.xml"
+ regex: "github/grpc/reports/**"
+ regex: "github/grpc/artifacts/**"
+ }
+}
diff --git a/tools/internal_ci/linux/grpc_build_artifacts_extra.sh b/tools/internal_ci/linux/grpc_build_artifacts_extra.sh
new file mode 100755
index 0000000..718123d
--- /dev/null
+++ b/tools/internal_ci/linux/grpc_build_artifacts_extra.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+# Copyright 2017 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -ex
+
+# change to grpc repo root
+cd $(dirname $0)/../../..
+
+source tools/internal_ci/helper_scripts/prepare_build_linux_rc
+
+set +ex
+[[ -s /etc/profile.d/rvm.sh ]] && . /etc/profile.d/rvm.sh
+set -e # rvm commands are very verbose
+rvm --default use ruby-2.4.1
+set -ex
+
+tools/run_tests/task_runner.py -f artifact linux_extra armv7 -j 6