add haproxy container

Signed-off-by: Gong Sophia <sophia.gong@intel.com>

.travis.yml

@@ -8,6 +8,7 @@ env:
   - DOCKERFILE_DIR=clr-installer-ci
   - DOCKERFILE_DIR=clr-sdk
   - DOCKERFILE_DIR=elasticsearch
+  - DOCKERFILE_DIR=haproxy
   - DOCKERFILE_DIR=httpd
   - DOCKERFILE_DIR=machine-learning-ui
   - DOCKERFILE_DIR=machine-learning

haproxy/Dockerfile

@@ -0,0 +1,18 @@
+FROM clearlinux:latest
+MAINTAINER sophia.gong@intel.com
+
+ARG swupd_args
+
+RUN swupd update --no-boot-update $swupd_args
+
+RUN swupd bundle-add haproxy $swupd_args \
+    && rm -rf /var/lib/swupd \
+    && mkdir -p /usr/local/etc/haproxy
+
+STOPSIGNAL SIGUSR1
+
+COPY docker-entrypoint.sh /
+COPY haproxy.cfg /usr/local/etc/haproxy
+
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["haproxy", "-f", "/usr/local/etc/haproxy/haproxy.cfg"]

haproxy/README.md

@@ -0,0 +1,25 @@
+haproxy
+==========
+This provides a Clear Linux* haproxy instance.
+
+Build
+-----
+docker build -t clearlinux/haproxy .
+
+Or just pull it from Dockerhub
+---------------------------
+docker pull clearlinux/haproxy
+
+start a haproxy instance
+-----------------------
+docker run --name some-haproxy -d -p 8080:80 clearlinux/haproxy
+
+use customized configuration file
+---------------------
+Since no two users of haproxy are likely to configure it exactly alike, we provide /usr/local/etc/haproxy/haproxy.cfg as an example, user may need to customize their own and override this default. Please refer to [page](https://cbonte.github.io/haproxy-dconv/) for configure details.
+
+Extra Build ARGs
+----------------
+- ``swupd_args`` Specifies [SWUPD](https://github.com/clearlinux/swupd-client/blob/master/docs/swupd.1.rst#options) flags
+
+Default build args in Docker are on: https://docs.docker.com/engine/reference/builder/#arg

haproxy/docker-entrypoint.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+set -e
+
+# first arg is `-f` or `--some-option`
+if [ "${1#-}" != "$1" ]; then
+        set -- haproxy "$@"
+fi
+
+if [ "$1" = 'haproxy' ]; then
+        shift # "haproxy"
+        # if the user wants "haproxy", let's add a couple useful flags
+        #   -W  -- "master-worker mode" (similar to the old "haproxy-systemd-wrapper"; allows for reload via "SIGUSR2")
+        #   -db -- disables background mode
+        set -- haproxy -W -db "$@"
+fi
+
+exec "$@"

haproxy/haproxy.cfg

@@ -0,0 +1,16 @@
+global
+        daemon
+        maxconn 256
+
+defaults
+        mode http
+        timeout connect 5000ms
+        timeout client 50000ms
+        timeout server 50000ms
+
+frontend http-in
+        bind *:80
+        default_backend servers
+
+backend servers
+        server server1 127.0.0.1:8000 maxconn 32