Upgrade s6 overlay to v3 (#23)

* implement s6-overlay v3
* adjust healthcheck

Dockerfile

@@ -50,10 +50,11 @@ RUN set -x && \
     TEMP_PACKAGES+=(curl) && \
     TEMP_PACKAGES+=(file) && \
     TEMP_PACKAGES+=(gnupg2) && \
+    TEMP_PACKAGES+=(xz-utils) && \
+    # Dependencies for healthcheck
+    KEPT_PACKAGES+=(iproute2) && \
     # Better logging
     KEPT_PACKAGES+=(gawk) && \
-    # Dependencies for healthcheck
-    KEPT_PACKAGES+=(net-tools) && \
     # Install packages
     apt-get update && \
     apt-get install --no-install-recommends -y \
@@ -75,37 +76,24 @@ RUN set -x && \
     pushd /src/mlat-client && \
     ./setup.py build && \
     ./setup.py install && \
-    # cp -v ./mlat-client /usr/local/bin/mlat-client && \
     popd && \
-    # Deploy s6-overlay.
-    curl -s --location -o /tmp/deploy-s6-overlay.sh https://raw.githubusercontent.com/mikenye/deploy-s6-overlay/master/deploy-s6-overlay.sh && \
+    # Deploy s6-overlay
+    curl -o /tmp/deploy-s6-overlay.sh -s https://raw.githubusercontent.com/mikenye/deploy-s6-overlay/master/deploy-s6-overlay-v3.sh && \
     bash /tmp/deploy-s6-overlay.sh && \
-    # Install 
-    # Deploy healthchecks framework
-    git clone \
-      --depth=1 \
-      https://github.com/mikenye/docker-healthchecks-framework.git \
-      /opt/healthchecks-framework \
-      && \
-    rm -rf \
-      /opt/healthchecks-framework/.git* \
-      /opt/healthchecks-framework/*.md \
-      /opt/healthchecks-framework/tests \
-      && \
-    # Clean-up.
+    # Clean-up
     apt-get remove -y ${TEMP_PACKAGES[@]} && \
     apt-get autoremove -y && \
     rm -rf /src/* /tmp/* /var/lib/apt/lists/* && \
     find /var/log -type f -exec truncate --size=0 {} \; && \
     # Simple tests
     mlat-client --help && \
     pw-feeder --version && \
-    # Document versions.
+    # Document versions
     set +o pipefail && \
     cat /PW_FEEDER_VERSION
 
 COPY rootfs/ /
 
 ENTRYPOINT [ "/init" ]
 
-HEALTHCHECK --interval=300s --timeout=5s --start-period=60s --retries=3 CMD /scripts/healthcheck.sh
+HEALTHCHECK --interval=300s --timeout=15s --start-period=60s --retries=3 CMD bash /scripts/healthcheck.sh

rootfs/etc/s6-overlay/s6-rc.d/initialise/type

@@ -0,0 +1 @@
+oneshot

rootfs/etc/s6-overlay/s6-rc.d/initialise/up

@@ -0,0 +1,4 @@
+#!/command/with-contenv bash
+#shellcheck shell=bash
+
+exec /scripts/initialise.sh

rootfs/etc/s6-overlay/s6-rc.d/mlat-client/run

@@ -0,0 +1,4 @@
+#!/command/with-contenv bash
+#shellcheck shell=bash
+
+exec /scripts/mlat-client.sh

rootfs/etc/s6-overlay/s6-rc.d/mlat-client/type

@@ -0,0 +1 @@
+longrun

rootfs/etc/s6-overlay/s6-rc.d/pw-feeder/run

@@ -0,0 +1,5 @@
+#!/command/with-contenv bash
+#shellcheck shell=bash
+
+fdmove -c 2 1 /usr/local/sbin/pw-feeder
+

rootfs/etc/s6-overlay/s6-rc.d/pw-feeder/type

@@ -0,0 +1 @@
+longrun

rootfs/scripts/healthcheck.sh

@@ -1,29 +1,66 @@
-#!/usr/bin/with-contenv bash
+#!/command/with-contenv bash
 #shellcheck shell=bash
 
-# Import healthchecks-framework
-# shellcheck disable=SC1091
-source /opt/healthchecks-framework/healthchecks.sh
-
 # Prepare EXITCODE variable
 EXITCODE=0
 
-echo "Ensure connection to beast provider $BEASTHOST:$BEASTPORT"
-if ! check_tcp4_connection_established ANY ANY "$(get_ipv4 "$BEASTHOST")" "$BEASTPORT"; then
+# check pw-feeder to beasthost connection
+echo -n "pw-feeder connected to $BEASTHOST:$BEASTPORT: "
+if ! ss --tcp --processes state established dst "$BEASTHOST" \&\& dport "$BEASTPORT" | grep pw-feeder > /dev/null 2>&1; then
     EXITCODE=1
+    echo "FAIL"
+else
+    echo "OK"
 fi
 
-PW_FEED_DESTINATION_BEAST_HOST=$(echo "${PW_BEAST_ENDPOINT}" | cut -d: -f1)
-PW_FEED_DESTINATION_BEAST_PORT=$(echo "${PW_BEAST_ENDPOINT}" | cut -d: -f2)
-
-echo "Ensure connection to plane.watch $PW_FEED_DESTINATION_BEAST_HOST:$PW_FEED_DESTINATION_BEAST_PORT"
-if ! check_tcp4_connection_established ANY ANY "$(get_ipv4 "$PW_FEED_DESTINATION_BEAST_HOST")" "$PW_FEED_DESTINATION_BEAST_PORT"; then
+# check pw-feeder to plane.watch BEAST connection
+echo -n "pw-feeder connected to $PW_BEAST_ENDPOINT: "
+if ! ss --tcp --processes state established dst "$PW_BEAST_ENDPOINT" | grep pw-feeder > /dev/null 2>&1; then
     EXITCODE=1
+    echo "FAIL"
+else
+    echo "OK"
 fi
 
-echo "Check service death tally"
-if ! check_s6_service_abnormal_death_tally ALL; then
-    EXITCODE=1
+# if MLAT enabled...
+if [[ "${ENABLE_MLAT,,}" == "true" ]]; then
+
+    # check mlat-client to beasthost connection
+    echo -n "mlat-client connected to $BEASTHOST:$BEASTPORT: "
+    if ! ss --tcp --processes state established dst "$BEASTHOST" \&\& dport "$BEASTPORT" | grep mlat-client > /dev/null 2>&1; then
+        EXITCODE=1
+        echo "FAIL"
+    else
+        echo "OK"
+    fi
+
+    # check mlat-client to pw-feeder connection
+    echo -n "mlat-client connected to pw-client ($MLATSERVERHOST:$MLATSERVERPORT): "
+    if ! ss --tcp --processes state established dst "$MLATSERVERHOST" \&\& dport "$MLATSERVERPORT" | grep mlat-client > /dev/null 2>&1; then
+        EXITCODE=1
+        echo "FAIL"
+    else
+        echo "OK"
+    fi
+
+    # check mlat-client to pw-feeder connection
+    echo -n "pw-feeder connected to mlat-client: "
+    if ! ss --tcp --processes state established src "$MLATSERVERHOST" \&\& sport "$MLATSERVERPORT" | grep pw-feeder > /dev/null 2>&1; then
+        EXITCODE=1
+        echo "FAIL"
+    else
+        echo "OK"
+    fi
+
+    # check pw-feeder to plane.watch MLAT connection
+    echo -n "pw-feeder connected to $PW_MLAT_ENDPOINT: "
+    if ! ss --tcp --processes state established dst "$PW_MLAT_ENDPOINT" | grep pw-feeder > /dev/null 2>&1; then
+        EXITCODE=1
+        echo "FAIL"
+    else
+        echo "OK"
+    fi
+
 fi
 
 exit "$EXITCODE"

rootfs/etc/cont-init.d/02-sanity_check → rootfs/scripts/initialise.sh

@@ -1,7 +1,6 @@
-#!/usr/bin/with-contenv bash
-# shellcheck shell=bash
+#!/command/with-contenv bash
+#shellcheck shell=bash
 
-# Define bash colours
 NOCOLOR='\033[0m'
 LIGHTRED='\033[1;31m'
 YELLOW='\033[1;33m'
@@ -11,6 +10,17 @@ if [[ -n "$DEBUG_LOGGING" ]]; then
     set -x
 fi
 
+echo "[init] Setting timezone..."
+
+# Set up timezone
+if [ -z "${TZ}" ]; then
+  echo -e "${YELLOW}WARNING: TZ environment variable not set${NOCOLOR}"
+else
+  ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime && echo "$TZ" > /etc/timezone
+fi
+
+echo "[init] Checking environment variables..."
+
 # Check to make sure the correct command line arguments have been set
 EXITCODE=0
 if [ -z "${BEASTHOST}" ]; then
@@ -41,4 +51,6 @@ if [ "$EXITCODE" -ne 0 ]; then
   exit 1
 fi
 
+echo "[init] Completed"
+
 exit "$EXITCODE"

rootfs/etc/services.d/mlat-client/run → rootfs/scripts/mlat-client.sh

@@ -1,5 +1,5 @@
-#!/usr/bin/with-contenv bash
-# shellcheck shell=bash
+#!/command/with-contenv bash
+#shellcheck shell=bash
 
 # If mlat enabled...
 if [[ "${ENABLE_MLAT,,}" == "true" ]]; then