Docker test image random reaper (#106)

* First draft of test dockerfile build

* Test dockerfile, build works, container runs and cluster tests go through

* Removed fifo for output

* renaming dockerfile

* Adding functionality for test 12
Added scripts and entrypoint mods to the testing docker image to allow for random shut down and startup
(both SIGSTOP and SIGINT) of the ipfs-cluster-service.

* test docker image ready for tests 12 and 13

Dockerfile-test

@@ -25,6 +25,9 @@ RUN apk add --no-cache --virtual cluster-deps make musl-dev go git \
     && make -C ipfs-cluster-service install \
     && make -C ipfs-cluster-ctl install \
     && cp docker/test-entrypoint.sh /usr/local/bin/start-daemons.sh \
+    && cp docker/random-stopper.sh /usr/local/bin/random-stopper.sh \
+    && cp docker/random-killer.sh /usr/local/bin/random-killer.sh \
+    && cp docker/wait-killer-stopper.sh /usr/local/bin/wait-killer-stopper.sh \
     && chmod +x /usr/local/bin/start-daemons.sh \
     && apk del --purge cluster-deps \
     && cd / && rm -rf /go/src /go/bin/gx /go/bin/gx-go

docker/random-killer.sh

@@ -0,0 +1,19 @@
+#! /bin/bash
+
+# $1=sleep time, $2=first command, $3=second command
+# Loop forever
+KILLED=1
+sleep 2
+while true; do
+    if [ "$(($RANDOM % 10))" -gt "4" ]; then
+        # Take down cluster
+        if [ "$KILLED" -eq "1" ]; then
+            KILLED=0
+            killall ipfs-cluster-service
+        else # Bring up cluster
+            KILLED=1
+            ipfs-cluster-service &
+        fi
+    fi
+    sleep 2.5
+done

docker/random-stopper.sh

@@ -0,0 +1,19 @@
+#! /bin/bash
+
+# $1=sleep time, $2=first command, $3=second command
+# Loop forever
+STOPPED=1
+sleep 2
+while true; do
+    if [ "$(($RANDOM % 10))" -gt "4" ]; then
+        # Take down cluster
+        if [ "$STOPPED" -eq "1" ]; then
+            STOPPED=0
+            killall -STOP ipfs-cluster-service
+        else # Take down cluster
+            STOPPED=1
+            killall -CONT ipfs-cluster-service
+        fi
+    fi
+    sleep 1
+done

docker/test-entrypoint.sh

@@ -46,5 +46,11 @@ else
     sed -i 's/127\.0\.0\.1\/tcp\/9095/0.0.0.0\/tcp\/9095/' "$IPFS_CLUSTER_PATH/service.json"
 fi
 ipfs-cluster-service $@ &
+/usr/local/bin/random-stopper.sh &
+kill -STOP $!
+echo $! > /data/ipfs-cluster/random-stopper-pid
+/usr/local/bin/random-killer.sh &
+kill -STOP $!
+echo $! > /data/ipfs-cluster/random-killer-pid
 echo "Daemons launched"
 exec tail -f /dev/null

docker/wait-killer-stopper.sh

@@ -0,0 +1,12 @@
+#! /bin/bash
+
+## Wait for cluster service process to exist and the stop the
+## killer
+DONE=1
+while [ $DONE = 1 ]; do
+    sleep 0.1
+    if [ $(pgrep -f ipfs-cluster-service) ]; then
+        kill -STOP $(cat /data/ipfs-cluster/random-killer-pid)
+        DONE=0
+    fi
+done