Initial implementation of etcd image

Change-Id: Ic9229c3ddd48e590b72abbe9cdab30e29a7aa94c

.gitignore

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+*.py[cod]
+
+# C extensions
+*.so
+
+# Packages
+*.egg
+*.egg-info
+dist
+build
+.eggs
+eggs
+parts
+bin
+var
+sdist
+develop-eggs
+.installed.cfg
+lib
+lib64
+
+# Installer logs
+pip-log.txt
+
+# Unit test / coverage reports
+.coverage
+cover
+.tox
+nosetests.xml
+.testrepository
+.venv
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+# Complexity
+output/*.html
+output/*/index.html
+
+# Sphinx
+doc/build
+
+# oslo-config-generator
+etc/*.sample
+
+# pbr generates these
+AUTHORS
+ChangeLog
+
+# Editors
+*~
+.*.swp
+.*sw?
+
+# Vagrant
+.vagrant
+vagrant/Vagrantfile.custom
+vagrant/vagrantkey*
+
+# generated openrc
+openrc
+
+# tests
+tests/.cache/*
+

docker/etcd/Dockerfile.j2

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+FROM {{ namespace }}/base-tools:{{ tag }}
+MAINTAINER {{ maintainer }}
+
+RUN curl -L -o etcd-{{ etcd_version }}-linux-amd64.tar.gz https://github.com/coreos/etcd/releases/download/{{ etcd_version }}/etcd-{{ etcd_version }}-linux-amd64.tar.gz \
+    && tar -zxvf etcd-{{ etcd_version }}-linux-amd64.tar.gz \
+    && mv etcd-{{ etcd_version }}-linux-amd64/etcd /usr/local/bin \
+    && mkdir -p /var/etcd/ \
+    && rm -r etcd-{{ etcd_version }}-linux-amd64 \
+    && rm etcd-{{ etcd_version }}-linux-amd64.tar.gz

service/etcd.yaml

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+service:
+  name: etcd
+  ports:
+    - etcd_client_port
+    - etcd_server_port
+  containers:
+    - name: etcd
+      image: etcd
+      probes:
+        readiness: "true"
+        liveness: "true"
+      daemon:
+        command: etcd --listen-client-urls http://0.0.0.0:{{ etcd_client_port }}
+                      --advertise-client-urls http://0.0.0.0:{{ etcd_server_port }}

service/files/defaults.yaml

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+configs:
+  etcd_client_port: 2379
+  etcd_server_port: 2380
+
+versions:
+  etcd_version: v3.0.1

tools/run-check-yaml-syntax.sh

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+#!/bin/bash
+
+### Temp yaml syntax checker script.
+set -e
+for file in $(find . -name '*.yaml'); do
+    yamllint -d relaxed $file
+done

tox.ini

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+[tox]
+minversion = 1.6
+envlist = linters
+skipsdist = True
+
+[testenv:linters]
+deps = yamllint
+commands =
+    {toxinidir}/tools/run-check-yaml-syntax.sh