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|
#
# these methods are made available in capistrano tasks as 'leap.method_name'
# (see RemoteCommand::new_capistrano)
#
module LeapCli; module Remote; module LeapPlugin
def required_packages
"puppet rsync lsb-release locales"
end
def log(*args, &block)
LeapCli.logger.log(*args, &block)
end
#
# creates directories that are owned by root and 700 permissions
#
def mkdirs(*dirs)
raise ArgumentError.new('illegal dir name') if dirs.grep(/[\' ]/).any?
run dirs.collect{|dir| "mkdir -m 700 -p #{dir}; "}.join
end
#
# echos "ok" if the node has been initialized and the required packages are installed, bails out otherwise.
#
def assert_initialized
begin
test_initialized_file = "test -f #{Leap::Platform.init_path}"
check_required_packages = "! dpkg-query -W --showformat='${Status}\n' #{required_packages} 2>&1 | grep -q -E '(deinstall|no packages)'"
run "#{test_initialized_file} && #{check_required_packages} && echo ok"
rescue Capistrano::CommandError => exc
LeapCli::Util.bail! do
exc.hosts.each do |host|
node = host.to_s.split('.').first
LeapCli::Util.log :error, "running deploy: node not initialized. Run 'leap node init #{node}'", :host => host
end
end
end
end
#
# bails out the deploy if the file /etc/leap/no-deploy exists.
# This kind of sucks, because it would be better to skip over nodes that have no-deploy set instead
# halting the entire deploy. As far as I know, with capistrano, there is no way to close one of the
# ssh connections in the pool and make sure it gets no further commands.
#
def check_for_no_deploy
begin
run "test ! -f /etc/leap/no-deploy"
rescue Capistrano::CommandError => exc
LeapCli::Util.bail! do
exc.hosts.each do |host|
LeapCli::Util.log "Can't continue because file /etc/leap/no-deploy exists", :host => host
end
end
end
end
#
# dumps debugging information
# #
def debug
run "#{Leap::Platform.leap_dir}/bin/debug.sh"
end
#
# dumps the recent deploy history to the console
#
def history(lines)
command = "(test -s /var/log/leap/deploy-summary.log && tail -n #{lines} /var/log/leap/deploy-summary.log) || (test -s /var/log/leap/deploy-summary.log.1 && tail -n #{lines} /var/log/leap/deploy-summary.log.1) || (echo 'no history')"
run command
end
#
# This is a hairy ugly hack, exactly the kind of stuff that makes ruby
# dangerous and too much fun for its own good.
#
# In most places, we run remote ssh without a current 'task'. This works fine,
# except that in a few places, the behavior of capistrano ssh is controlled by
# the options of the current task.
#
# We don't want to create an actual current task, because tasks are no fun
# and can't take arguments or return values. So, when we need to configure
# things that can only be configured in a task, we use this handy hack to
# fake the current task.
#
# This is NOT thread safe, but could be made to be so with some extra work.
#
def with_task(name)
task = @config.tasks[name]
@config.class.send(:alias_method, :original_current_task, :current_task)
@config.class.send(:define_method, :current_task, Proc.new(){ task })
begin
yield
ensure
@config.class.send(:remove_method, :current_task)
@config.class.send(:alias_method, :current_task, :original_current_task)
end
end
#
# similar to run(cmd, &block), but with:
#
# * exit codes
# * stdout and stderr are combined
#
def stream(cmd, &block)
command = '%s 2>&1; echo "exitcode=$?"' % cmd
run(command) do |channel, stream, data|
exitcode = nil
if data =~ /exitcode=(\d+)\n/
exitcode = $1.to_i
data.sub!(/exitcode=(\d+)\n/,'')
end
yield({:host => channel[:host], :data => data, :exitcode => exitcode})
end
end
#
# like stream, but capture all the output before returning
#
def capture(cmd, &block)
command = '%s 2>&1; echo "exitcode=$?" 2>&1;' % cmd
host_data = {}
run(command) do |channel, stream, data|
host_data[channel[:host]] ||= ""
if data =~ /exitcode=(\d+)\n/
exitcode = $1.to_i
data.sub!(/exitcode=(\d+)\n/,'')
host_data[channel[:host]] += data
yield({:host => channel[:host], :data => host_data[channel[:host]], :exitcode => exitcode})
else
host_data[channel[:host]] += data
end
end
end
#
# Run a command, with a nice status report and progress indicator.
# Only successful results are returned, errors are printed.
#
# For each successful run on each host, block is yielded with a hash like so:
#
# {:host => 'bluejay', :exitcode => 0, :data => 'shell output'}
#
def run_with_progress(cmd, &block)
ssh_failures = []
exitcode_failures = []
succeeded = []
task = LeapCli.logger.log_level > 1 ? :standard_task : :skip_errors_task
with_task(task) do
log :querying, 'facts' do
progress " "
call_on_failure do |host|
ssh_failures << host
progress 'F'
end
capture(cmd) do |response|
if response[:exitcode] == 0
progress '.'
yield response
else
exitcode_failures << response
progress 'F'
end
end
end
end
puts "done"
if ssh_failures.any?
log :failed, 'to connect to nodes: ' + ssh_failures.join(' ')
end
if exitcode_failures.any?
log :failed, 'to run successfully:' do
exitcode_failures.each do |response|
log "[%s] exit %s - %s" % [response[:host], response[:exitcode], response[:data].strip]
end
end
end
rescue Capistrano::RemoteError => err
log :error, err.to_s
end
private
def progress(str='.')
print str
STDOUT.flush
end
end; end; end
|
