Can't install couchbase gem on CentOS 7

Ruby SDK
1

Here is an exception that I get when I try to install it on a CentOS 7 server:

$ gem install couchbase
Building native extensions. This could take a while...
ERROR:  Error installing couchbase:
	ERROR: Failed to build gem native extension.

    current directory: /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0/ext
/home/deploy/.rbenv/versions/2.7.1/bin/ruby -I /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0 -r ./siteconf20200928-16463-3ufbwi.rb extconf.rb
checking for cmake... yes
rm -rf /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
mkdir -p /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
-- build RelWithDebInfo extension 3.0.0 for ruby 2.7.1-83-x86_64-linux
-- /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
-- cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DRUBY_HDR_DIR=/home/deploy/.rbenv/versions/2.7.1/include/ruby-2.7.0 -DRUBY_ARCH_HDR_DIR=/home/deploy/.rbenv/versions/2.7.1/include/ruby-2.7.0/x86_64-linux -DTAOCPP_JSON_BUILD_TESTS=OFF -DTAOCPP_JSON_BUILD_EXAMPLES=OFF -DSNAPPY_BUILD_TESTS=OFF -DSNAPPY_INSTALL=OFF /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0/ext
CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
  CMake 3.15 or higher is required.  You are running version 2.8.12.2


-- Configuring incomplete, errors occurred!
-- /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
-- make -j4 VERBOSE=1
make: *** No targets specified and no makefile found.  Stop.
ERROR: failed to build extension in /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0/libcouchbase.so
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/deploy/.rbenv/versions/2.7.1/bin/$(RUBY_BASE_NAME)

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/couchbase-3.0.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0 for inspection.
Results logged to /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/couchbase-3.0.0/gem_make.out

Centos 7 actually has cmake 3 and when I provide it I receive different error:

$ mkdir ~/bin; export PATH=~/bin:$PATH; ln -s /usr/bin/cmake3 ~/bin/cmake
$ gem install couchbase
Building native extensions. This could take a while...
ERROR:  Error installing couchbase:
	ERROR: Failed to build gem native extension.

    current directory: /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0/ext
/home/deploy/.rbenv/versions/2.7.1/bin/ruby -I /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0 -r ./siteconf20200928-17582-r8nxjh.rb extconf.rb
checking for cmake... yes
rm -rf /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
mkdir -p /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
-- build RelWithDebInfo extension 3.0.0 for ruby 2.7.1-83-x86_64-linux
-- /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
-- cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DRUBY_HDR_DIR=/home/deploy/.rbenv/versions/2.7.1/include/ruby-2.7.0 -DRUBY_ARCH_HDR_DIR=/home/deploy/.rbenv/versions/2.7.1/include/ruby-2.7.0/x86_64-linux -DTAOCPP_JSON_BUILD_TESTS=OFF -DTAOCPP_JSON_BUILD_EXAMPLES=OFF -DSNAPPY_BUILD_TESTS=OFF -DSNAPPY_INSTALL=OFF /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0/ext
-- The CXX compiler identification is GNU 4.8.5
-- The C compiler identification is GNU 4.8.5
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ - works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc - works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Looking for backtrace
-- Looking for backtrace - found
-- Looking for dladdr
-- Looking for dladdr - found
-- Found Git: /usr/bin/git (found version "1.8.3.1") 
-- Build spdlog: 1.6.0
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Build type: RelWithDebInfo
-- Check if the system is big endian
-- Searching 16 bit integer
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of unsigned short
-- Check size of unsigned short - done
-- Searching 16 bit integer - Using unsigned short
-- Check if the system is big endian - little endian
-- Looking for sys/mman.h
-- Looking for sys/mman.h - found
-- Looking for sys/resource.h
-- Looking for sys/resource.h - found
-- Looking for sys/time.h
-- Looking for sys/time.h - found
-- Looking for sys/uio.h
-- Looking for sys/uio.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Looking for windows.h
-- Looking for windows.h - not found
-- Looking for zlibVersion in z
-- Looking for zlibVersion in z - found
-- Looking for lzo1x_1_15_compress in lzo2
-- Looking for lzo1x_1_15_compress in lzo2 - not found
-- Performing Test HAVE_VISUAL_STUDIO_ARCH_AVX
-- Performing Test HAVE_VISUAL_STUDIO_ARCH_AVX - Failed
-- Performing Test HAVE_VISUAL_STUDIO_ARCH_AVX2
-- Performing Test HAVE_VISUAL_STUDIO_ARCH_AVX2 - Failed
-- Performing Test HAVE_CLANG_MAVX
-- Performing Test HAVE_CLANG_MAVX - Success
-- Performing Test HAVE_CLANG_MBMI2
-- Performing Test HAVE_CLANG_MBMI2 - Success
-- Performing Test HAVE_BUILTIN_EXPECT
-- Performing Test HAVE_BUILTIN_EXPECT - Success
-- Performing Test HAVE_BUILTIN_CTZ
-- Performing Test HAVE_BUILTIN_CTZ - Success
-- Performing Test HAVE_ATTRIBUTE_ALWAYS_INLINE
-- Performing Test HAVE_ATTRIBUTE_ALWAYS_INLINE - Failed
-- Performing Test SNAPPY_HAVE_SSSE3
-- Performing Test SNAPPY_HAVE_SSSE3 - Failed
-- Performing Test SNAPPY_HAVE_BMI2
-- Performing Test SNAPPY_HAVE_BMI2 - Failed
-- Looking for mmap
-- Looking for mmap - found
-- Looking for sysconf
-- Looking for sysconf - found
-- Found OpenSSL: /usr/lib64/libcrypto.so (found version "1.0.2k")  
-- OPENSSL_VERSION: 1.0.2k
-- OPENSSL_INCLUDEDIRS: /usr/include
-- OPENSSL_LIBRARIES: /usr/lib64/libssl.so;/usr/lib64/libcrypto.so
-- RUBY_INCLUDE_DIR: /home/deploy/.rbenv/versions/2.7.1/include/ruby-2.7.0;/home/deploy/.rbenv/versions/2.7.1/include/ruby-2.7.0/x86_64-linux
-- RUBY_LIBRARY: 
fatal: Not a git repository (or any of the parent directories): .git
-- Configuring done
CMake Error in CMakeLists.txt:
  The compiler feature "cxx_std_17" is not known to CXX compiler

  "GNU"

  version 4.8.5.


CMake Generate step failed.  Build files cannot be regenerated correctly.
-- /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0
-- make -j4 VERBOSE=1
make: *** No targets specified and no makefile found.  Stop.
ERROR: failed to build extension in /tmp/cb-RelWithDebInfo-2.7.1-83-x86_64-linux-3.0.0/libcouchbase.so
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/deploy/.rbenv/versions/2.7.1/bin/$(RUBY_BASE_NAME)

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/couchbase-3.0.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0 for inspection.
Results logged to /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/extensions/x86_64-linux/2.7.0/couchbase-3.0.0/gem_make.out

It looks like gem need newer glibc which is hard to update on CentOS 7. Can you confirm if this gem should work on CentOS 7 or only newer versions are supported? There are no OS mentions on https://docs.couchbase.com/ruby-sdk/3.0/project-docs/compatibility.html page.

I also tried to use gem version with included libcouchbase(from https://github.com/couchbase/couchbase-ruby-client/releases/tag/3.0.0) but it fails too:

$ ruby -r couchbase -e ‘p Couchbase::VERSION’
Traceback (most recent call last):
	1: from /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
/home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require': cannot load such file -- couchbase (LoadError)
	5: from /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:156:in `require'
	4: from /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168:in `rescue in require'
	3: from /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:168:in `require'
	2: from /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0-x86_64-linux/lib/couchbase.rb:16:in `<top (required)>'
	1: from /home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require'
/home/deploy/.rbenv/versions/2.7.1/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:92:in `require': /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0-x86_64-linux/lib/couchbase/libcouchbase.so) - /home/deploy/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/couchbase-3.0.0-x86_64-linux/lib/couchbase/libcouchbase.so (LoadError)
2

If you want to build couchbase ruby gem from sources, you have to make sure you have recent cmake and c++ compiler (with support of at least C++17 standard). In case of gcc, it is at least GCC7.

I will fix it in 3.0.1 release.

1 Like
3

I did not try to build gem itself, only to install it via gem install. I though that it would work on CentOS 7 because C SDK supports it and Python SDK lists CentOS 7 as supported too(https://docs.couchbase.com/python-sdk/current/project-docs/compatibility.html#platform-compatibility).

I will fix it in 3.0.1 release.

Thank you! Can you also update https://docs.couchbase.com/ruby-sdk/3.0/project-docs/compatibility.html with a list of supported OS?

By the way, is it possible to use couchbase ruby gem with c lib installed via https://docs.couchbase.com/c-sdk/3.0/hello-world/start-using-sdk.html#installing-binary-packages-without-a-repository? I.e. using it instead of building native extension during gem install.

4

Now you can install current snapshot build from official repository. We have prebuilt binaries there. You can put this line into your Gemfile

gem "couchbase", "~> 3.0.1.snapshot", :source => "https://sdk-snapshots.couchbase.com/ruby/2.7.0/"

Or directly with gem

gem install --source https://sdk-snapshots.couchbase.com/ruby/2.7.0/ couchbase --pre
5

Looks like 3.0.1.snapshot version works fine:

$ ruby -r couchbase -e 'p Couchbase::VERSION'
{:sdk=>"3.0.1.snapshot.679", :backend=>"1.0.1", :build_timestamp=>"2020-10-01 11:53:30", :revision=>"4c0d2423a781d3df637c65fbca3bcf91638d0d16", :platform=>"Linux-4.15.0-66-generic", :cpu=>"x86_64", :cc=>"GNU 9.3.1", :cxx=>"GNU 9.3.1", :ruby=>"2.7.0", :spdlog=>"1.6.0", :asio=>"1.18.0", :snappy=>"1.1.8", :http_parser=>"2.9.4", :openssl_headers=>"OpenSSL 1.1.1c FIPS  28 May 2019", :openssl_runtime=>"OpenSSL 1.1.1c FIPS  28 May 2019", :static_stdlib=>true, :static_openssl=>true}

Thank you!