WIP.

Removed references to Jobber, replaced with Cron.
Created crontab at /etc/cron.d/scrutiny
Running cron in foreground.
Adding timezone support
Working Collector image (untested master).

.dockerignore

@@ -0,0 +1,6 @@
+/dist
+/vendor
+/.idea
+/.github
+/.git
+/webapp/frontend/node_modules

docker/Dockerfile

@@ -31,15 +31,13 @@ EXPOSE 8080
 WORKDIR /scrutiny
 ENV PATH="/scrutiny/bin:${PATH}"
 
-ADD https://github.com/dshearer/jobber/releases/download/v1.4.4/jobber_1.4.4-1_amd64.deb /tmp/
-RUN apt install /tmp/jobber_1.4.4-1_amd64.deb
-
-RUN apt-get update && apt-get install -y smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates curl && update-ca-certificates
+RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates curl && update-ca-certificates
 
 ADD https://github.com/just-containers/s6-overlay/releases/download/v1.21.8.0/s6-overlay-amd64.tar.gz /tmp/
 RUN tar xzf /tmp/s6-overlay-amd64.tar.gz -C /
 COPY /rootfs /
 
+COPY /rootfs/etc/cron.d/scrutiny /etc/cron.d/scrutiny
 COPY --from=backendbuild /go/src/github.com/analogj/scrutiny/scrutiny /scrutiny/bin/
 COPY --from=backendbuild /go/src/github.com/analogj/scrutiny/scrutiny-collector-selftest /scrutiny/bin/
 COPY --from=backendbuild /go/src/github.com/analogj/scrutiny/scrutiny-collector-metrics /scrutiny/bin/
@@ -47,11 +45,11 @@ COPY --from=frontendbuild /scrutiny/dist /scrutiny/web
 RUN chmod +x /scrutiny/bin/scrutiny && \
     chmod +x /scrutiny/bin/scrutiny-collector-selftest && \
     chmod +x /scrutiny/bin/scrutiny-collector-metrics && \
+    chmod 0644 /etc/cron.d/scrutiny && \
+    rm -f /etc/cron.daily/* && \
     mkdir -p /scrutiny/web && \
     mkdir -p /scrutiny/config && \
-    mkdir -p /scrutiny/jobber && \
-    chmod -R ugo+rwx /scrutiny/config && \
-    chmod -R ugo+rwx /scrutiny/jobber
+    chmod -R ugo+rwx /scrutiny/config
 
 
 CMD ["/init"]

docker/Dockerfile.collector

@@ -11,20 +11,18 @@ RUN go mod vendor && \
 
 ########
 FROM ubuntu:bionic as runtime
-EXPOSE 8080
 WORKDIR /scrutiny
 ENV PATH="/scrutiny/bin:${PATH}"
 
-ADD https://github.com/dshearer/jobber/releases/download/v1.4.4/jobber_1.4.4-1_amd64.deb /tmp/
-RUN apt install /tmp/jobber_1.4.4-1_amd64.deb
-
-RUN apt-get update && apt-get install -y smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates && update-ca-certificates
-
-COPY /rootfs/scrutiny /scrutiny
+RUN apt-get update && apt-get install -y cron smartmontools=7.0-0ubuntu1~ubuntu18.04.1 ca-certificates && update-ca-certificates
 
+COPY /docker/entrypoint-collector.sh /entrypoint-collector.sh
+COPY /rootfs/etc/cron.d/scrutiny /etc/cron.d/scrutiny
 COPY --from=backendbuild /go/src/github.com/analogj/scrutiny/scrutiny-collector-selftest /scrutiny/bin/
 COPY --from=backendbuild /go/src/github.com/analogj/scrutiny/scrutiny-collector-metrics /scrutiny/bin/
 RUN chmod +x /scrutiny/bin/scrutiny-collector-selftest && \
-    chmod +x /scrutiny/bin/scrutiny-collector-metrics
+    chmod +x /scrutiny/bin/scrutiny-collector-metrics && \
+    chmod 0644 /etc/cron.d/scrutiny && \
+    rm -f /etc/cron.daily/apt /etc/cron.daily/dpkg /etc/cron.daily/passwd
 
-CMD ["/usr/lib/x86_64-linux-gnu/jobberrunner", "/scrutiny/jobber/jobber.yaml"]
+CMD ["/entrypoint-collector.sh"]

docker/entrypoint-collector.sh

@@ -0,0 +1,9 @@
+# Cron runs in its own isolated environment (usually using only /etc/environment )
+# So when the container starts up, we will do a dump of the runtime environment into a .env file that we
+# will then source into the crontab file (/etc/cron.d/scrutiny.sh)
+
+printenv | sed 's/^\(.*\)$/export \1/g' > /env.sh
+
+# now that we have the env start cron in the foreground
+echo "starting cron"
+cron -f

rootfs/etc/cont-init.d/01-timezone

@@ -0,0 +1,7 @@
+#!/usr/bin/with-contenv bash
+
+if [ -n "${TZ}" ]
+then
+    ln -snf "/usr/share/zoneinfo/${TZ}" /etc/localtime
+    echo "${TZ}" > /etc/timezone
+fi

rootfs/etc/cron.d/scrutiny

@@ -0,0 +1,15 @@
+# Example of job definition:
+# .---------------- minute (0 - 59)
+# |  .------------- hour (0 - 23)
+# |  |  .---------- day of month (1 - 31)
+# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
+# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
+# |  |  |  |  |
+# *  *  *  *  * user-name command to be executed
+
+# TODO: correctly route collector logs (STDOUT & STDERR), print to Cron foreground (collectable by Docker STDOUT?)
+# TODO: change cron schedule to daily at midnight:  '0 0 0 * * *'
+# System environmental variables are stripped by cron, source our dump of the docker environmental variables before each command
+* * * * * root . /env.sh; /scrutiny/bin/scrutiny-collector-metrics run >> /var/log/scrutiny.log 2>&1
+* * * * * root date >> /var/log/cron.log
+# An empty line is required at the end of this file for a valid cron file.

rootfs/etc/services.d/cron/finish

@@ -1,4 +1,4 @@
 #!/usr/bin/execlineb -S0
 
-echo "jobber/cron exiting"
+echo "cron exiting"
 s6-svscanctl -t /var/run/s6/services

rootfs/etc/services.d/cron/run

@@ -0,0 +1,10 @@
+#!/usr/bin/with-contenv bash
+
+# Cron runs in its own isolated environment (usually using only /etc/environment )
+# So when the container starts up, we will do a dump of the runtime environment into a .env file that we
+# will then source into the crontab file (/etc/cron.d/scrutiny.sh)
+
+printenv | sed 's/^\(.*\)$/export \1/g' > /env.sh
+
+echo "starting cron"
+cron -f

rootfs/etc/services.d/jobber/run

@@ -1,5 +0,0 @@
-#!/usr/bin/with-contenv bash
-
-echo "starting jobber/cron"
-
-su -c "/usr/lib/x86_64-linux-gnu/jobberrunner /scrutiny/jobber/jobber.yaml" root

rootfs/scrutiny/jobber/jobber.yaml

@@ -1,30 +0,0 @@
-version: 1.4
-
-prefs:
-  logPath: /scrutiny/jobber/log.log
-  runLog:
-    type: file
-    path: /scrutiny/jobber/runlog
-    maxFileLen: 100m
-    maxHistories: 2
-
-resultSinks:
-  - &filesystemSink
-    type: filesystem
-    path: /scrutiny/jobber
-    data:
-      - stdout
-      - stderr
-    maxAgeDays: 10
-
-jobs:
-  MetricsJob:
-    cmd: /scrutiny/bin/scrutiny-collector-metrics run
-    # run daily at midnight.
-    time: '0 0 0 * * *'
-    onError: Backoff
-    notifyOnSuccess:
-      - *filesystemSink
-    notifyOnFailure:
-      - *filesystemSink
-