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c71f5cdb30
Redhat conf_dir detection was regressed in 57d7275 which inadvertently
removed the setting of @conf_dir. Any attempt to use the postgres
resource on RHEL would rain an exception:
inspec> postgres.data_dir
TypeError: no implicit conversion of nil into String
Further, the redhat detection code appears to assume that RHEL always
uses versioned data directories. This however, does not appear to be the
case:
$ cat /etc/redhat-release
CentOS release 6.7 (Final)
$ sudo ls /var/lib/pgsql/
backups data pgstartup.log
The code now can handle both versioned and un-versioned directory
formats on RHEL. Further, it provides diagnostic warnings about
uncertainty in the discovered data directories and configuration
directories.
Signed-off-by: Steven Danna <steve@chef.io>
122 lines
4 KiB
Ruby
122 lines
4 KiB
Ruby
# encoding: utf-8
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# copyright: 2015, Vulcano Security GmbH
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# author: Dominik Richter
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# author: Christoph Hartmann
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# license: All rights reserved
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module Inspec::Resources
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class Postgres < Inspec.resource(1)
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name 'postgres'
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attr_reader :service, :data_dir, :conf_dir, :conf_path
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def initialize
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os = inspec.os
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if os.debian?
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#
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# https://wiki.debian.org/PostgreSql
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#
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# Debian allows multiple versions of postgresql to be
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# installed as well as multiple "clusters" to be configured.
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#
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version = version_from_dir('/etc/postgresql')
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cluster = cluster_from_dir("/etc/postgresql/#{version}")
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@conf_dir = "/etc/postgresql/#{version}/#{cluster}"
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@data_dir = "/var/lib/postgresql/#{version}/#{cluster}"
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elsif os.redhat?
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#
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# /var/lib/pgsql/data is the default data directory on RHEL6
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# and RHEL7. However, PR #824 explicitly added version-based
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# directories. Thus, we call #version_from_dir unless it looks
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# like we are using unversioned directories.
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#
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# TODO(ssd): This has the potential to be noisy because of the
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# warning in version_from_dir. We should determine which case
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# is more common and only warn in the less common case.
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#
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version = if inspec.directory('/var/lib/pgsql/data').exist?
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warn 'Found /var/lib/pgsql/data. Assuming postgresql install uses un-versioned directories.'
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nil
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else
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version_from_dir('/var/lib/pgsql/')
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end
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@data_dir = File.join('/var/lib/pgsql/', version.to_s, 'data')
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elsif os[:name] == 'arch'
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#
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# https://wiki.archlinux.org/index.php/PostgreSQL
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#
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# The archlinux wiki points to /var/lib/postgresql/data as the
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# main data directory.
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#
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@data_dir = '/var/lib/postgres/data'
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else
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#
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# According to https://www.postgresql.org/docs/9.5/static/creating-cluster.html
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#
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# > There is no default, although locations such as
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# > /usr/local/pgsql/data or /var/lib/pgsql/data are popular.
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#
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@data_dir = '/var/lib/pgsql/data'
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end
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@service = 'postgresql'
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@conf_dir ||= @data_dir
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verify_dirs
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@conf_path = File.join @conf_dir, 'postgresql.conf'
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end
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def to_s
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'PostgreSQL'
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end
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private
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def verify_dirs
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if !inspec.directory(@conf_dir).exist?
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warn "Default postgresql configuration directory: #{@conf_dir} does not exist. Postgresql may not be installed or we've misidentified the configuration directory."
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end
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if !inspec.directory(@data_dir).exist?
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warn "Default postgresql data directory: #{@data_dir} does not exist. Postgresql may not be installed or we've misidentified the data directory."
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end
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end
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def version_from_dir(dir)
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dirs = inspec.command("ls -d #{dir}/*/").stdout
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entries = dirs.lines.count
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case entries
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when 0
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warn "Could not determine version of installed postgresql by inspecting #{dir}"
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nil
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when 1
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warn "Using #{dirs}: #{dir_to_version(dirs)}"
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dir_to_version(dirs)
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else
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warn "Multiple versions of postgresql installed or incorrect base dir #{dir}"
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first = dir_to_version(dirs.lines.first)
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warn "Using the first version found: #{first}"
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first
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end
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end
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def dir_to_version(dir)
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dir.chomp.split('/').last
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end
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def cluster_from_dir(dir)
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# Main is the default cluster name on debian use it if it
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# exists.
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if inspec.directory("#{dir}/main").exist?
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'main'
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else
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dirs = inspec.command("ls -d #{dir}/*/").stdout.lines
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first = dirs.first.chomp.split('/').last
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if dirs.count > 1
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warn "Multiple postgresql clusters configured or incorrect base dir #{dir}"
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warn "Using the first directory found: #{first}"
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end
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first
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end
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end
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end
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end
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