Check containerd's readiness before calling critest

It was assuming containerd was ready right after starting.
But it depends GitHub actions' performance.

In addition to that, this commit extracts the script from ci.yml.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>

.github/workflows/ci.yml

@@ -546,30 +546,7 @@ jobs:
           TEST_RUNTIME: ${{ matrix.runtime }}
           ENABLE_CRI_SANDBOXES: ${{ matrix.enable_cri_sandboxes }}
         run: |
-          BDIR="$(mktemp -d -p $PWD)"
+          sudo -E PATH=$PATH ./script/critest.sh "${{github.workspace}}/report"
-          mkdir -p ${{github.workspace}}/report
-
-          function cleanup() {
-            sudo pkill containerd || true
-
-            echo ::group::containerd logs
-            cat ${{github.workspace}}/report/containerd.log
-            echo ::endgroup::
-
-            sudo -E rm -rf ${BDIR}
-          }
-          trap cleanup EXIT
-
-          mkdir -p ${BDIR}/{root,state}
-          cat > ${BDIR}/config.toml <<EOF
-            version = 2
-            [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
-            runtime_type = "${TEST_RUNTIME}"
-          EOF
-          sudo ls /etc/cni/net.d
-          sudo -E PATH=$PATH /usr/local/bin/containerd -a ${BDIR}/c.sock --config ${BDIR}/config.toml --root ${BDIR}/root --state ${BDIR}/state --log-level debug &> ${{github.workspace}}/report/containerd.log &
-          sudo -E PATH=$PATH /usr/local/bin/ctr -a ${BDIR}/c.sock version
-          sudo -E PATH=$PATH critest --report-dir "${{github.workspace}}/report" --runtime-endpoint=unix:///${BDIR}/c.sock --parallel=8
 
       # Log the status of this VM to investigate issues like
       # https://github.com/containerd/containerd/issues/4969

script/critest.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+#   Copyright The containerd 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 -eu -o pipefail
+
+report_dir=$1
+
+mkdir -p $report_dir
+BDIR="$(mktemp -d -p $PWD)"
+
+function cleanup() {
+    pkill containerd || true
+    echo ::group::containerd logs
+    cat "$report_dir/containerd.log"
+    echo ::endgroup::
+    rm -rf ${BDIR}
+}
+trap cleanup EXIT
+
+mkdir -p ${BDIR}/{root,state}
+cat > ${BDIR}/config.toml <<EOF
+version = 2
+[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
+runtime_type = "${TEST_RUNTIME}"
+EOF
+ls /etc/cni/net.d
+
+/usr/local/bin/containerd \
+    -a ${BDIR}/c.sock \
+    --config ${BDIR}/config.toml \
+    --root ${BDIR}/root \
+    --state ${BDIR}/state \
+    --log-level debug &> "$report_dir/containerd.log" &
+
+# Make sure containerd is ready before calling critest.
+for i in $(seq 1 10)
+do
+    crictl --runtime-endpoint ${BDIR}/c.sock info && break || sleep 1
+done
+
+critest --report-dir "$report_dir" --runtime-endpoint=unix:///${BDIR}/c.sock --parallel=8