add carbonapi container

carbonapi/Dockerfile

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+FROM golang:1.8-alpine
+
+
+ENV VERSION=0.8.0
+
+RUN mkdir -p /go/src
+
+ADD https://github.com/go-graphite/carbonapi/archive/${VERSION}.zip /tmp/carbonapi.zip
+
+# build carbonapi
+RUN set -x                                           \
+    && apk add --update git                          \
+    && cd /go/src                                    \
+    && unzip /tmp/carbonapi.zip                      \
+    && mv /go/src/carbonapi-* /go/src/carbonapi      \
+    && cd /go/src/carbonapi                          \
+    && go-wrapper download                           \
+    && go-wrapper install                            \
+    && apk del git                                   \
+    && rm -f /tmp/carbonapi.zip                      \
+    && rm -rf /var/cache/apk/*
+
+EXPOSE 8080
+
+COPY entrypoint.sh /entrypoint.sh
+COPY carbonapi.yaml /etc/carbonapi.yaml
+
+ENTRYPOINT [ "/entrypoint.sh" ]
+CMD [ "/go/bin/carbonapi", "-config", "/etc/carbonapi.yaml"]

carbonapi/carbonapi.yaml

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+
+# Need to be URL, http or https
+zipper: "ZIPPER"
+# Listen address, should always include hostname or ip address and a port.
+listen: "0.0.0.0:8080"
+# Max concurrent requests to CarbonZipper
+concurency: 20
+cache:
+   # Type of caching. Valid: "mem", "memcache", "none"
+   type: "null"
+   # Cache limit in megabytes
+   size_mb: 10 
+   # Only used by memcache type of cache. List of memcache servers.
+   memcachedServers:
+       - "127.0.0.1:1234"
+       - "127.0.0.2:1235"
+# Amount of CPUs to use. 0 - unlimited
+cpus: 0
+# Timezone, default - local
+tz: ""
+# If 'true', carbonapi will send requests as is, with globs and braces
+# Otherwise for each request it will generate /metrics/find and then /render
+# individual metrics.
+# true - faster, but will cause carbonzipper to consume much more RAM.
+sendGlobsAsIs: true
+graphite:
+    # Host:port where to send internal metrics
+    # Empty = disabled
+    host: "GRAPHITE_HOST"
+    interval: "60s"
+    prefix: "carbon.api"
+# Maximium idle connections to carbonzipper
+idleConnections: 10
+pidFile: ""
+# See https://github.com/go-graphite/carbonzipper/blob/master/example.conf#L70-L108 for format explanation
+logger:
+    - logger: ""
+      file: "stderr"
+      level: "debug"
+      encoding: "console"
+      encodingTime: "iso8601"
+      encodingDuration: "seconds"

carbonapi/entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+if [ -z "$ZIPPER" ]
+then
+    ZIPPER=http://localhost:8080
+fi
+
+if [ -z "GRAPHITE_HOST" ]
+then
+    GRAPHITE_HOST=''
+fi
+
+sed -e "s#ZIPPER#$ZIPPER#g" -i /etc/carbonapi.yaml
+sed -e "s#GRAPHITE_HOST#$GRAPHITE_HOST#g" -i /etc/carbonapi.yaml
+
+
+$@