[frontend] Add host to the Peek status bar

to show which host the request is serving in the HA mode.
This required that we add the hostname package to the base docker image.

docker-files/base/Dockerfile.42.3

@@ -9,7 +9,7 @@ RUN echo 'solver.allowVendorChange = true' >> /etc/zypp/zypp.conf; \
 # Install requirements for all our containers
 RUN zypper -n install --no-recommends --replacefiles \
   make gcc gcc-c++ patch curl vim vim-data psmisc \
-  timezone ack glibc-locale sudo aaa_base
+  timezone ack glibc-locale sudo aaa_base hostname
 
 # Add our bootstrap script
 ADD docker-bootstrap.sh /root/bin/docker-bootstrap.sh

src/api/Gemfile

@@ -63,6 +63,7 @@ gem 'feature'
 # for profiling
 gem 'peek'
 gem 'peek-dalli'
+gem 'peek-host'
 gem 'peek-mysql2'
 # for kerberos authentication
 gem 'gssapi', require: false

src/api/Gemfile.lock

@@ -228,6 +228,8 @@ GEM
       concurrent-ruby-ext
       dalli
       peek
+    peek-host (1.0.0)
+      peek
     peek-mysql2 (1.2.0)
       concurrent-ruby
       concurrent-ruby-ext
@@ -462,6 +464,7 @@ DEPENDENCIES
   nokogiri
   peek
   peek-dalli
+  peek-host
   peek-mysql2
   poltergeist
   pry (>= 0.9.12)

src/api/config/initializers/peek.rb

@@ -1,2 +1,3 @@
 Peek.into Peek::Views::Mysql2
 Peek.into Peek::Views::Dalli
+Peek.into Peek::Views::Host