Решено Make sure that `gem install pg -v '0.20.0'` succeeds before bundling

bundle install

An error occurred while installing pg (0.20.0), and Bundler cannot continue.
Make sure that `gem install pg -v '0.20.0'` succeeds before bundling.

$ gem install pg -v '0.20.0'

------------------------

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

  /home/shadow/.gem/ruby/extensions/x86_64-linux/2.3.0/pg-0.20.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/shadow/.gem/ruby/gems/pg-0.20.0 for inspection.
Results logged to /home/shadow/.gem/ruby/extensions/x86_64-linux/2.3.0/pg-0.20.0/gem_make.out


$ cat /home/shadow/.gem/ruby/extensions/x86_64-linux/2.3.0/pg-0.20.0/mkmf.log
find_executable: checking for pg_config... -------------------- no

--------------------

find_header: checking for libpq-fe.h... -------------------- no

"gcc -o conftest -I/usr/include -I/usr/include/ruby/backward -I/usr/include -I.    -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -mtune=generic -fPIC conftest.c  -L. -L/usr/lib64 -L. -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -fstack-protector -rdynamic -Wl,-export-dynamic  -m64   -lruby  -lpthread -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"gcc -E -I/usr/include -I/usr/include/ruby/backward -I/usr/include -I.    -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -mtune=generic -fPIC  conftest.c -o conftest.i"
conftest.c:3:22: фатальная ошибка: libpq-fe.h: No such file or directory
 #include <libpq-fe.h>
                      ^
компиляция прервана.
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <libpq-fe.h>
/* end */

--------------------

sudo dnf install gcc gcc-c++

sudo dnf install postgresql-server postgresql-contrib

$ bin/rails db:migrate RAILS_ENV=development
== 20170618193606 CreateWeathers: migrating ===================================
-- create_table(:weathers)
   -> 0.0671s
== 20170618193606 CreateWeathers: migrated (0.0676s) ==========================

$ bin/rails db:migrate RAILS_ENV=development
bash: bin/rails: Permission denied

$ bundle exec rake rails:update:bin

sudo -u postgres psql
[sudo] пароль для postgres: 
Попробуйте ещё раз.

sudo passwd postgres

$ gem install pg-- --with-pg-config=/usr/pgsql-10/bin/pg_config

bundle install