Add liveness script (cosmos#7081)

.github/workflows/test.yml

@@ -194,3 +194,26 @@ jobs:
       - uses: actions/checkout@v2
       - name: test-unit-amino
         run: make test-unit-amino
+  liveness-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v1
+        id: git_diff
+        with:
+          SUFFIX_FILTER: |
+            .go
+            .mod
+            .sum
+      - name: build image
+        run: |
+          make build-docker-local-simapp
+      - name: start localnet
+        run: |
+          make clean build-sim-linux localnet-start
+        if: "env.GIT_DIFF != ''"
+      - name: test liveness
+        run: |
+          ./contrib/localnet_liveness.sh 100 5 50 localhost
+        if: "env.GIT_DIFF != ''"

contrib/localnet_liveness.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+CNT=0
+ITER=$1
+SLEEP=$2
+NUMBLOCKS=$3
+NODEADDR=$4
+
+if [ -z "$1" ]; then
+  echo "Need to input number of iterations to run..."
+  exit 1
+fi
+
+if [ -z "$2" ]; then
+  echo "Need to input number of seconds to sleep between iterations"
+  exit 1
+fi
+
+if [ -z "$3" ]; then
+  echo "Need to input block height to declare completion..."
+  exit 1
+fi
+
+if [ -z "$4" ]; then
+  echo "Need to input node address to poll..."
+  exit 1
+fi
+
+docker_containers=( $(docker ps -q -f name=simdnode --format='{{.Names}}') )
+
+while [ ${CNT} -lt $ITER ]; do
+  curr_block=$(curl -s $NODEADDR:26657/status | jq -r '.result.sync_info.latest_block_height')
+
+  if [ ! -z ${curr_block} ] ; then
+    echo "Number of Blocks: ${curr_block}"
+  fi
+
+  if [ ! -z ${curr_block} ] && [ ${curr_block} -gt ${NUMBLOCKS} ]; then
+    echo "Number of blocks reached. Success!"
+    exit 0
+  fi
+
+  # Emulate network chaos:
+  #
+  # Every 10 blocks, pick a random container and restart it.
+  if ! ((${CNT} % 10)); then
+    rand_container=${docker_containers["$[RANDOM % ${#docker_containers[@]}]"]};
+    echo "Restarting random docker container ${rand_container}"
+    docker restart ${rand_container} &>/dev/null &
+  fi
+  let CNT=CNT+1
+  sleep $SLEEP
+done
+echo "Timeout reached. Failure!"
+exit 1