add kolla-common shell library to base image

This adds a /opt/kolla/kolla-common.sh to the base image as a place to
put commonly used functions.  The goal is to avoid code duplication
across all the images created from this base image.

Change-Id: Ib670fe369bb8048aa69979b74a984fa4ddaae7d9

docker/fedora-rdo-base/Dockerfile

@@ -1,8 +1,15 @@
 FROM fedora
 MAINTAINER Steven Dake <sdake@redhat.com>
 
+# Set up repositories
 RUN yum install -y https://rdo.fedorapeople.org/rdo-release.rpm
+RUN yum -y install dnf dnf-plugins-core; yum clean all
+RUN dnf copr enable -y larsks/crux
+
+# Update packages
 RUN yum update -y; yum clean all
+
+# Install base packages
 RUN yum install -y \
 	crux \
 	mariadb \
@@ -39,12 +46,12 @@ RUN yum install -y \
 	python-jsonschema \
 	python-keyring \
 	python-kombu \
+	python-ldap \
 	python-lesscpy \
 	python-lockfile \
 	python-lxml \
 	python-markdown \
 	python-memcached \
-	python-ldap \
 	python-migrate \
 	python-msgpack \
 	python-netifaces \
@@ -83,3 +90,7 @@ RUN yum install -y \
 	python-werkzeug \
 	python-wsme \
 	; yum clean all
+
+RUN mkdir -p /opt/kolla
+ADD kolla-common.sh /opt/kolla/kolla-common.sh
+

docker/fedora-rdo-base/kolla-common.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# Set some generally useful defaults.
+MY_IP=$(ip route get $(ip route | awk '$1 == "default" {print $3}') |
+    awk '$4 == "src" {print $5}')
+
+: ${PUBLIC_IP:=${MY_IP}}
+
+# Iterate over a list of variable names and exit if one is
+# undefined.
+check_required_vars() {
+    for var in $*; do
+        if [ -z "${!var}" ]; then
+            echo "ERROR: missing $var" >&2
+            exit 1
+        fi
+    done
+}
+
+# Exit unless we receive a successful response from the Glance API.
+check_for_glance() {
+    check_required_vars GLANCE_API_SERVICE_HOST
+    GLANCE_API_URL="http://${GLANCE_API_SERVICE_HOST}:9292/"
+
+    curl -sf -o /dev/null "$GLANCE_API_URL" || {
+        echo "ERROR: glance is not available @ $GLANCE_API_URL" >&2
+        exit 1
+    }
+
+    echo "glance is active @ $GLANCE_API_URL"
+}
+
+# Exit unless we receive a successful response from the Keystone API.
+check_for_keystone() {
+    check_required_vars KEYSTONE_PUBLIC_SERVICE_HOST
+
+    KEYSTONE_URL="http://${KEYSTONE_PUBLIC_SERVICE_HOST}:5000/v2.0"
+
+    curl -sf -o /dev/null "$KEYSTONE_URL" || {
+        echo "ERROR: keystone is not available @ $KEYSTONE_URL" >&2
+        exit 1
+    }
+
+    echo "keystone is active @ $KEYSTONE_URL"
+}
+
+# Exit unless we receive a successful response from the database server.
+check_for_db() {
+    check_required_vars MARIADB_SERVICE_HOST DB_ROOT_PASSWORD
+
+    mysql -h ${MARIADB_SERVICE_HOST} -u root -p"${DB_ROOT_PASSWORD}" \
+            -e "select 1" mysql > /dev/null 2>&1 || {
+        echo "ERROR: database is not available @ $MARIADB_SERVICE_HOST" >&2
+        exit 1
+    }
+
+    echo "database is active @ ${MARIADB_SERVICE_HOST}"
+}
+
+# Dump shell environment to a file
+dump_vars() {
+    set -o posix
+    set > /pid_$$_vars.sh
+    set +o posix
+}
+