- Установить VirtualBox (или VMware workstation player)
- Разобраться как создать виртуальную машину
- Создать новую vm на базе дистрибутива Centos (Centos это параллельная open source ветка rhel)
- Подключиться к созданной vm по ssh через любой клиент
- Установить Python на созданной vm
В домашней директорий пользователя создать папку task. Реализовать собственное key-values хранилище на Python. Данные будут сохраняться в файле storage.data(в формате JSON, можно использовать библиотеку tempfile, для хранения данных во временных файлах). Добавление новых данных в хранилище и получение текущих значений осуществляется с помощью утилиты командной строки storage.py.
Пример работы утилиты:
Сохранение данных
$ storage.py --key key_name --val value
Получение данных
$ storage.py --key key_nameОбратите внимание, что значения по одному ключу не перезаписываются, а добавляются к уже сохраненным. Другими словами - по одному ключу могут храниться несколько значений. При выводе на печать, значения выводятся в порядке их добавления в хранилище (Пример ввода "test_value,test_value2,test_value3" ). Формат вывода на печать для нескольких значений через запятую. Если значений по ключу не было найдено, выведите пустую строку или None. Сделать обработку исключений, если они будут возникать при тестировании. Скрипт должен работать в разных ОС.
- Версия Centos + просмотр версии ядра Linux
[sid@centos ~]$ cat /etc/centos-release
CentOS Linux release 7.9.2009 (Core)
[sid@centos ~]$ uname -r
3.10.0-1160.66.1.el7.x86_64- Текущая версия Python
[sid@centos ~]$ python -V
Python 2.7.5
[sid@centos ~]$ python3 --version
-bash: python3: command not found- Устанавливаем версию Python 3.6.8 из репозитория Epel
[sid@centos ~]$ sudo yum install epel-release
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirror.yandex.ru
* extras: mirror.yandex.ru
* updates: mirror.yandex.ru
base | 3.6 kB 00:00
extras | 2.9 kB 00:00
updates | 2.9 kB 00:00
updates/7/x86_64/primary_db | 16 MB 00:00
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-11 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
epel-release noarch 7-11 extras 15 k
Transaction Summary
================================================================================
Install 1 Package
Total download size: 15 k
Installed size: 24 k
Is this ok [y/d/N]: y
Downloading packages:
epel-release-7-11.noarch.rpm | 15 kB 00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : epel-release-7-11.noarch 1/1
Verifying : epel-release-7-11.noarch 1/1
Installed:
epel-release.noarch 0:7-11
Complete!
[sid@centos ~]$ sudo yum install python3 python3-devel python3-pip
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink | 19 kB 00:00:00
* base: mirror.yandex.ru
* epel: mirror.yandex.ru
* extras: mirror.yandex.ru
* updates: mirror.yandex.ru
epel | 4.7 kB 00:00:00
(1/3): epel/x86_64/group_gz | 97 kB 00:00:00
(2/3): epel/x86_64/updateinfo | 1.1 MB 00:00:00
(3/3): epel/x86_64/primary_db | 7.0 MB 00:00:00
Resolving Dependencies
--> Running transaction check
---> Package python3.x86_64 0:3.6.8-18.el7 will be installed
--> Processing Dependency: python3-libs(x86-64) = 3.6.8-18.el7 for package: python3-3.6.8-18.el7.x86_64
--> Processing Dependency: python3-setuptools for package: python3-3.6.8-18.el7.x86_64
--> Processing Dependency: libpython3.6m.so.1.0()(64bit) for package: python3-3.6.8-18.el7.x86_64
---> Package python3-devel.x86_64 0:3.6.8-18.el7 will be installed
--> Processing Dependency: redhat-rpm-config for package: python3-devel-3.6.8-18.el7.x86_64
--> Processing Dependency: python3-rpm-macros for package: python3-devel-3.6.8-18.el7.x86_64
--> Processing Dependency: python3-rpm-generators for package: python3-devel-3.6.8-18.el7.x86_64
--> Processing Dependency: python-rpm-macros for package: python3-devel-3.6.8-18.el7.x86_64
---> Package python3-pip.noarch 0:9.0.3-8.el7 will be installed
--> Running transaction check
---> Package python-rpm-macros.noarch 0:3-34.el7 will be installed
--> Processing Dependency: python-srpm-macros for package: python-rpm-macros-3-34.el7.noarch
---> Package python3-libs.x86_64 0:3.6.8-18.el7 will be installed
---> Package python3-rpm-generators.noarch 0:6-2.el7 will be installed
---> Package python3-rpm-macros.noarch 0:3-34.el7 will be installed
---> Package python3-setuptools.noarch 0:39.2.0-10.el7 will be installed
---> Package redhat-rpm-config.noarch 0:9.1.0-88.el7.centos will be installed
--> Processing Dependency: dwz >= 0.4 for package: redhat-rpm-config-9.1.0-88.el7.centos.noarch
--> Processing Dependency: zip for package: redhat-rpm-config-9.1.0-88.el7.centos.noarch
--> Processing Dependency: perl-srpm-macros for package: redhat-rpm-config-9.1.0-88.el7.centos.noarch
--> Processing Dependency: perl(Getopt::Long) for package: redhat-rpm-config-9.1.0-88.el7.centos.noarch
--> Processing Dependency: /usr/bin/perl for package: redhat-rpm-config-9.1.0-88.el7.centos.noarch
--> Running transaction check
---> Package dwz.x86_64 0:0.11-3.el7 will be installed
---> Package perl.x86_64 4:5.16.3-299.el7_9 will be installed
--> Processing Dependency: perl-libs = 4:5.16.3-299.el7_9 for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Socket) >= 1.3 for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Scalar::Util) >= 1.10 for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl-macros for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl-libs for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(threads::shared) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(threads) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(constant) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Time::Local) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Time::HiRes) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Storable) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Socket) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Scalar::Util) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Pod::Simple::XHTML) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Pod::Simple::Search) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Filter::Util::Call) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(File::Temp) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(File::Spec::Unix) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(File::Spec::Functions) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(File::Spec) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(File::Path) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Exporter) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Cwd) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: perl(Carp) for package: 4:perl-5.16.3-299.el7_9.x86_64
--> Processing Dependency: libperl.so()(64bit) for package: 4:perl-5.16.3-299.el7_9.x86_64
---> Package perl-Getopt-Long.noarch 0:2.40-3.el7 will be installed
--> Processing Dependency: perl(Pod::Usage) >= 1.14 for package: perl-Getopt-Long-2.40-3.el7.noarch
--> Processing Dependency: perl(Text::ParseWords) for package: perl-Getopt-Long-2.40-3.el7.noarch
---> Package perl-srpm-macros.noarch 0:1-8.el7 will be installed
---> Package python-srpm-macros.noarch 0:3-34.el7 will be installed
---> Package zip.x86_64 0:3.0-11.el7 will be installed
--> Running transaction check
---> Package perl-Carp.noarch 0:1.26-244.el7 will be installed
---> Package perl-Exporter.noarch 0:5.68-3.el7 will be installed
---> Package perl-File-Path.noarch 0:2.09-2.el7 will be installed
---> Package perl-File-Temp.noarch 0:0.23.01-3.el7 will be installed
---> Package perl-Filter.x86_64 0:1.49-3.el7 will be installed
---> Package perl-PathTools.x86_64 0:3.40-5.el7 will be installed
---> Package perl-Pod-Simple.noarch 1:3.28-4.el7 will be installed
--> Processing Dependency: perl(Pod::Escapes) >= 1.04 for package: 1:perl-Pod-Simple-3.28-4.el7.noarch
--> Processing Dependency: perl(Encode) for package: 1:perl-Pod-Simple-3.28-4.el7.noarch
---> Package perl-Pod-Usage.noarch 0:1.63-3.el7 will be installed
--> Processing Dependency: perl(Pod::Text) >= 3.15 for package: perl-Pod-Usage-1.63-3.el7.noarch
--> Processing Dependency: perl-Pod-Perldoc for package: perl-Pod-Usage-1.63-3.el7.noarch
---> Package perl-Scalar-List-Utils.x86_64 0:1.27-248.el7 will be installed
---> Package perl-Socket.x86_64 0:2.010-5.el7 will be installed
---> Package perl-Storable.x86_64 0:2.45-3.el7 will be installed
---> Package perl-Text-ParseWords.noarch 0:3.29-4.el7 will be installed
---> Package perl-Time-HiRes.x86_64 4:1.9725-3.el7 will be installed
---> Package perl-Time-Local.noarch 0:1.2300-2.el7 will be installed
---> Package perl-constant.noarch 0:1.27-2.el7 will be installed
---> Package perl-libs.x86_64 4:5.16.3-299.el7_9 will be installed
---> Package perl-macros.x86_64 4:5.16.3-299.el7_9 will be installed
---> Package perl-threads.x86_64 0:1.87-4.el7 will be installed
---> Package perl-threads-shared.x86_64 0:1.43-6.el7 will be installed
--> Running transaction check
---> Package perl-Encode.x86_64 0:2.51-7.el7 will be installed
---> Package perl-Pod-Escapes.noarch 1:1.04-299.el7_9 will be installed
---> Package perl-Pod-Perldoc.noarch 0:3.20-4.el7 will be installed
--> Processing Dependency: perl(parent) for package: perl-Pod-Perldoc-3.20-4.el7.noarch
--> Processing Dependency: perl(HTTP::Tiny) for package: perl-Pod-Perldoc-3.20-4.el7.noarch
---> Package perl-podlators.noarch 0:2.5.1-3.el7 will be installed
--> Running transaction check
---> Package perl-HTTP-Tiny.noarch 0:0.033-3.el7 will be installed
---> Package perl-parent.noarch 1:0.225-244.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
==================================================================================================================================================================================================================
Package Arch Version Repository Size
==================================================================================================================================================================================================================
Installing:
python3 x86_64 3.6.8-18.el7 updates 70 k
python3-devel x86_64 3.6.8-18.el7 updates 217 k
python3-pip noarch 9.0.3-8.el7 base 1.6 M
Installing for dependencies:
dwz x86_64 0.11-3.el7 base 99 k
perl x86_64 4:5.16.3-299.el7_9 updates 8.0 M
perl-Carp noarch 1.26-244.el7 base 19 k
perl-Encode x86_64 2.51-7.el7 base 1.5 M
perl-Exporter noarch 5.68-3.el7 base 28 k
perl-File-Path noarch 2.09-2.el7 base 26 k
perl-File-Temp noarch 0.23.01-3.el7 base 56 k
perl-Filter x86_64 1.49-3.el7 base 76 k
perl-Getopt-Long noarch 2.40-3.el7 base 56 k
perl-HTTP-Tiny noarch 0.033-3.el7 base 38 k
perl-PathTools x86_64 3.40-5.el7 base 82 k
perl-Pod-Escapes noarch 1:1.04-299.el7_9 updates 52 k
perl-Pod-Perldoc noarch 3.20-4.el7 base 87 k
perl-Pod-Simple noarch 1:3.28-4.el7 base 216 k
perl-Pod-Usage noarch 1.63-3.el7 base 27 k
perl-Scalar-List-Utils x86_64 1.27-248.el7 base 36 k
perl-Socket x86_64 2.010-5.el7 base 49 k
perl-Storable x86_64 2.45-3.el7 base 77 k
perl-Text-ParseWords noarch 3.29-4.el7 base 14 k
perl-Time-HiRes x86_64 4:1.9725-3.el7 base 45 k
perl-Time-Local noarch 1.2300-2.el7 base 24 k
perl-constant noarch 1.27-2.el7 base 19 k
perl-libs x86_64 4:5.16.3-299.el7_9 updates 690 k
perl-macros x86_64 4:5.16.3-299.el7_9 updates 44 k
perl-parent noarch 1:0.225-244.el7 base 12 k
perl-podlators noarch 2.5.1-3.el7 base 112 k
perl-srpm-macros noarch 1-8.el7 base 4.6 k
perl-threads x86_64 1.87-4.el7 base 49 k
perl-threads-shared x86_64 1.43-6.el7 base 39 k
python-rpm-macros noarch 3-34.el7 base 9.1 k
python-srpm-macros noarch 3-34.el7 base 8.8 k
python3-libs x86_64 3.6.8-18.el7 updates 6.9 M
python3-rpm-generators noarch 6-2.el7 base 20 k
python3-rpm-macros noarch 3-34.el7 base 8.1 k
python3-setuptools noarch 39.2.0-10.el7 base 629 k
redhat-rpm-config noarch 9.1.0-88.el7.centos base 81 k
zip x86_64 3.0-11.el7 base 260 k
Transaction Summary
==================================================================================================================================================================================================================
Install 3 Packages (+37 Dependent packages)
Total download size: 21 M
Installed size: 85 M
Is this ok [y/d/N]: н
Is this ok [y/d/N]: y
Downloading packages:
(1/40): dwz-0.11-3.el7.x86_64.rpm | 99 kB 00:00:00
(2/40): perl-File-Path-2.09-2.el7.noarch.rpm | 26 kB 00:00:00
(3/40): perl-File-Temp-0.23.01-3.el7.noarch.rpm | 56 kB 00:00:00
(4/40): perl-Filter-1.49-3.el7.x86_64.rpm | 76 kB 00:00:00
(5/40): perl-Getopt-Long-2.40-3.el7.noarch.rpm | 56 kB 00:00:00
(6/40): perl-HTTP-Tiny-0.033-3.el7.noarch.rpm | 38 kB 00:00:00
(7/40): perl-PathTools-3.40-5.el7.x86_64.rpm | 82 kB 00:00:00
(8/40): perl-Carp-1.26-244.el7.noarch.rpm | 19 kB 00:00:00
(9/40): perl-Pod-Perldoc-3.20-4.el7.noarch.rpm | 87 kB 00:00:00
(10/40): perl-Exporter-5.68-3.el7.noarch.rpm | 28 kB 00:00:00
(11/40): perl-Pod-Simple-3.28-4.el7.noarch.rpm | 216 kB 00:00:00
(12/40): perl-Scalar-List-Utils-1.27-248.el7.x86_64.rpm | 36 kB 00:00:00
(13/40): perl-Socket-2.010-5.el7.x86_64.rpm | 49 kB 00:00:00
(14/40): perl-Storable-2.45-3.el7.x86_64.rpm | 77 kB 00:00:00
(15/40): perl-Text-ParseWords-3.29-4.el7.noarch.rpm | 14 kB 00:00:00
(16/40): perl-Pod-Usage-1.63-3.el7.noarch.rpm | 27 kB 00:00:00
(17/40): perl-Time-HiRes-1.9725-3.el7.x86_64.rpm | 45 kB 00:00:00
(18/40): perl-constant-1.27-2.el7.noarch.rpm | 19 kB 00:00:00
(19/40): perl-Time-Local-1.2300-2.el7.noarch.rpm | 24 kB 00:00:00
(20/40): perl-Encode-2.51-7.el7.x86_64.rpm | 1.5 MB 00:00:00
(21/40): perl-Pod-Escapes-1.04-299.el7_9.noarch.rpm | 52 kB 00:00:00
(22/40): perl-libs-5.16.3-299.el7_9.x86_64.rpm | 690 kB 00:00:00
(23/40): perl-macros-5.16.3-299.el7_9.x86_64.rpm | 44 kB 00:00:00
(24/40): perl-parent-0.225-244.el7.noarch.rpm | 12 kB 00:00:00
(25/40): perl-5.16.3-299.el7_9.x86_64.rpm | 8.0 MB 00:00:00
(26/40): perl-srpm-macros-1-8.el7.noarch.rpm | 4.6 kB 00:00:00
(27/40): perl-threads-1.87-4.el7.x86_64.rpm | 49 kB 00:00:00
(28/40): perl-threads-shared-1.43-6.el7.x86_64.rpm | 39 kB 00:00:00
(29/40): python-rpm-macros-3-34.el7.noarch.rpm | 9.1 kB 00:00:00
(30/40): perl-podlators-2.5.1-3.el7.noarch.rpm | 112 kB 00:00:00
(31/40): python-srpm-macros-3-34.el7.noarch.rpm | 8.8 kB 00:00:00
(32/40): python3-3.6.8-18.el7.x86_64.rpm | 70 kB 00:00:00
(33/40): python3-pip-9.0.3-8.el7.noarch.rpm | 1.6 MB 00:00:00
(34/40): python3-rpm-macros-3-34.el7.noarch.rpm | 8.1 kB 00:00:00
(35/40): python3-setuptools-39.2.0-10.el7.noarch.rpm | 629 kB 00:00:00
(36/40): redhat-rpm-config-9.1.0-88.el7.centos.noarch.rpm | 81 kB 00:00:00
(37/40): zip-3.0-11.el7.x86_64.rpm | 260 kB 00:00:00
(38/40): python3-devel-3.6.8-18.el7.x86_64.rpm | 217 kB 00:00:00
(39/40): python3-rpm-generators-6-2.el7.noarch.rpm | 20 kB 00:00:00
(40/40): python3-libs-3.6.8-18.el7.x86_64.rpm | 6.9 MB 00:00:00
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 40 MB/s | 21 MB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : python3-libs-3.6.8-18.el7.x86_64 1/40
Installing : python3-pip-9.0.3-8.el7.noarch 2/40
Installing : python3-setuptools-39.2.0-10.el7.noarch 3/40
Installing : python3-3.6.8-18.el7.x86_64 4/40
Installing : python-srpm-macros-3-34.el7.noarch 5/40
Installing : python-rpm-macros-3-34.el7.noarch 6/40
Installing : python3-rpm-generators-6-2.el7.noarch 7/40
Installing : 1:perl-parent-0.225-244.el7.noarch 8/40
Installing : perl-HTTP-Tiny-0.033-3.el7.noarch 9/40
Installing : perl-podlators-2.5.1-3.el7.noarch 10/40
Installing : perl-Pod-Perldoc-3.20-4.el7.noarch 11/40
Installing : 1:perl-Pod-Escapes-1.04-299.el7_9.noarch 12/40
Installing : perl-Encode-2.51-7.el7.x86_64 13/40
Installing : perl-Text-ParseWords-3.29-4.el7.noarch 14/40
Installing : perl-Pod-Usage-1.63-3.el7.noarch 15/40
Installing : 4:perl-macros-5.16.3-299.el7_9.x86_64 16/40
Installing : 4:perl-Time-HiRes-1.9725-3.el7.x86_64 17/40
Installing : perl-Exporter-5.68-3.el7.noarch 18/40
Installing : perl-constant-1.27-2.el7.noarch 19/40
Installing : perl-Socket-2.010-5.el7.x86_64 20/40
Installing : perl-Time-Local-1.2300-2.el7.noarch 21/40
Installing : perl-Carp-1.26-244.el7.noarch 22/40
Installing : perl-Storable-2.45-3.el7.x86_64 23/40
Installing : perl-PathTools-3.40-5.el7.x86_64 24/40
Installing : perl-Scalar-List-Utils-1.27-248.el7.x86_64 25/40
Installing : 1:perl-Pod-Simple-3.28-4.el7.noarch 26/40
Installing : perl-File-Temp-0.23.01-3.el7.noarch 27/40
Installing : perl-File-Path-2.09-2.el7.noarch 28/40
Installing : perl-threads-shared-1.43-6.el7.x86_64 29/40
Installing : perl-threads-1.87-4.el7.x86_64 30/40
Installing : perl-Filter-1.49-3.el7.x86_64 31/40
Installing : 4:perl-libs-5.16.3-299.el7_9.x86_64 32/40
Installing : perl-Getopt-Long-2.40-3.el7.noarch 33/40
Installing : 4:perl-5.16.3-299.el7_9.x86_64 34/40
Installing : python3-rpm-macros-3-34.el7.noarch 35/40
Installing : dwz-0.11-3.el7.x86_64 36/40
Installing : perl-srpm-macros-1-8.el7.noarch 37/40
Installing : zip-3.0-11.el7.x86_64 38/40
Installing : redhat-rpm-config-9.1.0-88.el7.centos.noarch 39/40
Installing : python3-devel-3.6.8-18.el7.x86_64 40/40
Verifying : perl-HTTP-Tiny-0.033-3.el7.noarch 1/40
Verifying : python3-rpm-generators-6-2.el7.noarch 2/40
Verifying : perl-threads-shared-1.43-6.el7.x86_64 3/40
Verifying : 4:perl-Time-HiRes-1.9725-3.el7.x86_64 4/40
Verifying : zip-3.0-11.el7.x86_64 5/40
Verifying : perl-Exporter-5.68-3.el7.noarch 6/40
Verifying : perl-constant-1.27-2.el7.noarch 7/40
Verifying : perl-PathTools-3.40-5.el7.x86_64 8/40
Verifying : python3-3.6.8-18.el7.x86_64 9/40
Verifying : python3-pip-9.0.3-8.el7.noarch 10/40
Verifying : 4:perl-macros-5.16.3-299.el7_9.x86_64 11/40
Verifying : 1:perl-parent-0.225-244.el7.noarch 12/40
Verifying : perl-Socket-2.010-5.el7.x86_64 13/40
Verifying : perl-srpm-macros-1-8.el7.noarch 14/40
Verifying : python-rpm-macros-3-34.el7.noarch 15/40
Verifying : 1:perl-Pod-Simple-3.28-4.el7.noarch 16/40
Verifying : dwz-0.11-3.el7.x86_64 17/40
Verifying : perl-Time-Local-1.2300-2.el7.noarch 18/40
Verifying : 1:perl-Pod-Escapes-1.04-299.el7_9.noarch 19/40
Verifying : python3-devel-3.6.8-18.el7.x86_64 20/40
Verifying : python3-rpm-macros-3-34.el7.noarch 21/40
Verifying : perl-Carp-1.26-244.el7.noarch 22/40
Verifying : python3-libs-3.6.8-18.el7.x86_64 23/40
Verifying : perl-Storable-2.45-3.el7.x86_64 24/40
Verifying : perl-Scalar-List-Utils-1.27-248.el7.x86_64 25/40
Verifying : python3-setuptools-39.2.0-10.el7.noarch 26/40
Verifying : perl-File-Temp-0.23.01-3.el7.noarch 27/40
Verifying : perl-Pod-Usage-1.63-3.el7.noarch 28/40
Verifying : perl-Encode-2.51-7.el7.x86_64 29/40
Verifying : perl-Pod-Perldoc-3.20-4.el7.noarch 30/40
Verifying : perl-podlators-2.5.1-3.el7.noarch 31/40
Verifying : 4:perl-5.16.3-299.el7_9.x86_64 32/40
Verifying : perl-File-Path-2.09-2.el7.noarch 33/40
Verifying : perl-threads-1.87-4.el7.x86_64 34/40
Verifying : perl-Filter-1.49-3.el7.x86_64 35/40
Verifying : perl-Getopt-Long-2.40-3.el7.noarch 36/40
Verifying : perl-Text-ParseWords-3.29-4.el7.noarch 37/40
Verifying : python-srpm-macros-3-34.el7.noarch 38/40
Verifying : 4:perl-libs-5.16.3-299.el7_9.x86_64 39/40
Verifying : redhat-rpm-config-9.1.0-88.el7.centos.noarch 40/40
Installed:
python3.x86_64 0:3.6.8-18.el7 python3-devel.x86_64 0:3.6.8-18.el7 python3-pip.noarch 0:9.0.3-8.el7
Dependency Installed:
dwz.x86_64 0:0.11-3.el7 perl.x86_64 4:5.16.3-299.el7_9 perl-Carp.noarch 0:1.26-244.el7 perl-Encode.x86_64 0:2.51-7.el7
perl-Exporter.noarch 0:5.68-3.el7 perl-File-Path.noarch 0:2.09-2.el7 perl-File-Temp.noarch 0:0.23.01-3.el7 perl-Filter.x86_64 0:1.49-3.el7
perl-Getopt-Long.noarch 0:2.40-3.el7 perl-HTTP-Tiny.noarch 0:0.033-3.el7 perl-PathTools.x86_64 0:3.40-5.el7 perl-Pod-Escapes.noarch 1:1.04-299.el7_9
perl-Pod-Perldoc.noarch 0:3.20-4.el7 perl-Pod-Simple.noarch 1:3.28-4.el7 perl-Pod-Usage.noarch 0:1.63-3.el7 perl-Scalar-List-Utils.x86_64 0:1.27-248.el7
perl-Socket.x86_64 0:2.010-5.el7 perl-Storable.x86_64 0:2.45-3.el7 perl-Text-ParseWords.noarch 0:3.29-4.el7 perl-Time-HiRes.x86_64 4:1.9725-3.el7
perl-Time-Local.noarch 0:1.2300-2.el7 perl-constant.noarch 0:1.27-2.el7 perl-libs.x86_64 4:5.16.3-299.el7_9 perl-macros.x86_64 4:5.16.3-299.el7_9
perl-parent.noarch 1:0.225-244.el7 perl-podlators.noarch 0:2.5.1-3.el7 perl-srpm-macros.noarch 0:1-8.el7 perl-threads.x86_64 0:1.87-4.el7
perl-threads-shared.x86_64 0:1.43-6.el7 python-rpm-macros.noarch 0:3-34.el7 python-srpm-macros.noarch 0:3-34.el7 python3-libs.x86_64 0:3.6.8-18.el7
python3-rpm-generators.noarch 0:6-2.el7 python3-rpm-macros.noarch 0:3-34.el7 python3-setuptools.noarch 0:39.2.0-10.el7 redhat-rpm-config.noarch 0:9.1.0-88.el7.centos
zip.x86_64 0:3.0-11.el7
Complete!- Проверка версии Python 3
[sid@centos ~]$ python3 -V
Python 3.6.8- Создаем папку task в домашней директорий пользователя и заходим в неё.
[sid@centos ~]$ mkdir task
[sid@centos ~]$ cd task
[sid@centos task]$- Создаем скрипт storage.py и тестируем его.
[sid@centos task]$ vi storage.py
[sid@centos task]$ python3 storage.py --key key_name --val test_value
[sid@centos task]$ python3 storage.py --key key_name --val test_value2
[sid@centos task]$ python3 storage.py --key key_name --val test_value3
[sid@centos task]$ python3 storage.py --key key_name
value, test_value, test_value2, test_value3Задача выполнена
Написать сервис API на Python к key-values хранилищу из задания Самый простой фреймворк для реализации flask и дополнительный модуль flaskRESTful. Хранить данные можно так же во временных файлах в файле storage.data(в формате JSON, можно использовать библиотеку tempfile). Сервис должен уметь отвечать на запросы POST и GET. Требования к выводу можно взять из задания 1. Ниже в скриншотах есть демонстрация основных запросов и их вывода. На главной странице сервиса ‘/’ сделать описание возможностей сервиса API.
Пример запросов сервису: Получить все данные хранилища WEB: http://{HOSTNAME:PORT}/api/v1/storage/json/all
Получить все данные хранилища CURL:
curl -i -X GET http://{HOSTNAME:PORT}/api/v1/storage/json/all
Получить данные хранилища по ключу WEB: http://{HOSTNAME:PORT}/api/v1/storage/json?key=test
Получить данные хранилища по ключу CURL: curl -i -GET http://{HOSTNAME:PORT}/api/v1/storage/json/read?key=test
Добавить данные в хранилище хранилища WEB:
curl -i -H "Content-Type: application/json" -X POST -d '{"test3": "value4"}' http://{HOSTNAME:PORT}/api/v1/storage/json/write
Из сервиса сделать новый Docker Image и запустит контейнер, данные хранить внутри контейнера, при перезапуске будут отчищается
Создать 2 WEB сервера с выводом страницы «Hello Word! \n Server 1» (аналогично для второго Server 2). Сделать балансировку нагрузки (HA + keepalived), чтобы при обновлении страницы мы попадали на любой из WEB серверов. Для балансировки можно сделать 2 отдельных сервера, в сумме 4. Будет плюсом использование Docker.
- Для решения поставленной задачи с "плюсом" понадобится docker и docker-compose. В качестве головной системы для удобства использовался ноут с десктопной версией Ubuntu 22.04.1 LTS
root@sid-Easynote-TE69CX:/home/sid/r2.1# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.1 LTS
Release: 22.04
Codename: jammy
root@sid-Easynote-TE69CX:/home/sid/r2.1# uname -r
5.15.0-46-generic- Создадим файл Dockerfile. Используем alpine в качестве основного образа. Он имеет небольшой размер и идеально подойдет под нашу задачу.
FROM nginx:1.13.5-alpine
RUN apk update && apk upgrade
RUN apk add --no-cache bash curl ipvsadm iproute2 openrc keepalived && rm -f /var/cache/apk/* /tmp/*
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
CMD ["/entrypoint.sh"]- Далее пишем файл docker-compose.yml, будем имитировать онлайн-среду, развертываем 2 хоста мастера и соответственно 2 зависимых хоста для репликации и балансировки, устанавливаем nginx
version: "3"
services:
nginx_master1:
build:
context: ./
dockerfile: ./Dockerfile
volumes:
- ./index-master1.html:/usr/share/nginx/html/index.html
- ./favicon.ico:/usr/share/nginx/html/favicon.ico
- ./keepalived-master1.conf:/etc/keepalived/keepalived.conf
networks:
static-network:
ipv4_address: 172.20.128.2
cap_add:
- NET_ADMIN
nginx_slave1:
build:
context: ./
dockerfile: ./Dockerfile
volumes:
- ./index-slave1.html:/usr/share/nginx/html/index.html
- ./favicon.ico:/usr/share/nginx/html/favicon.ico
- ./keepalived-slave1.conf:/etc/keepalived/keepalived.conf
networks:
static-network:
ipv4_address: 172.20.128.3
cap_add:
- NET_ADMIN
nginx_master2:
build:
context: ./
dockerfile: ./Dockerfile
volumes:
- ./index-master2.html:/usr/share/nginx/html/index.html
- ./favicon.ico:/usr/share/nginx/html/favicon.ico
- ./keepalived-master2.conf:/etc/keepalived/keepalived.conf
networks:
static-network:
ipv4_address: 172.20.127.2
cap_add:
- NET_ADMIN
nginx_slave2:
build:
context: ./
dockerfile: ./Dockerfile
volumes:
- ./index-slave2.html:/usr/share/nginx/html/index.html
- ./favicon.ico:/usr/share/nginx/html/favicon.ico
- ./keepalived-slave2.conf:/etc/keepalived/keepalived.conf
networks:
static-network:
ipv4_address: 172.20.127.3
cap_add:
- NET_ADMIN
proxy1:
image: haproxy:1.7-alpine
ports:
- 8000:6301
volumes:
- ./haproxy1.cfg:/usr/local/etc/haproxy/haproxy.cfg
networks:
- static-network
proxy2:
image: haproxy:1.7-alpine
ports:
- 8001:6301
volumes:
- ./haproxy2.cfg:/usr/local/etc/haproxy/haproxy.cfg
networks:
- static-network
networks:
static-network:
ipam:
config:
- subnet: 172.20.0.0/16- Используем виртуальную прокси-службу для связи и работы наших контейнеров. Создаём 4 файла под нашу задачу: keepalived-master1.conf, keepalived-master2.conf keepalived-slave1.conf, keepalived-slave2.conf Для примера рассмотрим keepalived-master1.conf
vrrp_script chk_nginx {
script "pidof nginx"
interval 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 33
priority 200
advert_int 1
unicast_src_ip 172.20.128.2
unicast_peer {
172.20.128.3
}
authentication {
auth_type PASS
auth_pass letmein
}
virtual_ipaddress {
172.20.128.4/24 dev eth0
}
track_script {
chk_nginx
}
}- Затем создаём четыре веб-страницы для внутренней службы, две для хост-index-master.html и две для подчиненных index-slave.html с необходимым текстом по заданию. Пример index-master1.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title> Hello Word! \n Server 1 </title>
<style>
#box{
margin: 0px auto;
font-family: 'Times New Roman', Times, serif;
font-size: 30px;
font-style: initial;
color: aliceblue;
}
body{
background-color: black
}
</style>
</head>
<body>
<div id="box">
Hello Word! \n Server 1
</div>
</body>
</html>- Поскольку нам необходимо смоделировать фоновую службу, используем два файла конфигурации на каждый из хостов, пример haproxy1.cfg
global
log 127.0.0.1 local0
maxconn 4096
daemon
nbproc 4
defaults
log 127.0.0.1 local3
mode http
option dontlognull
option redispatch
retries 2
maxconn 2000
balance roundrobin
timeout connect 5000ms
timeout client 5000ms
timeout server 5000ms
frontend main
bind *:6301
default_backend webserver
backend webserver
server nginx_master1 172.20.128.4:80 check inter 2000 rise 2 fall 5- Сценарий служебной оболочки для entrypoint.sh
#!/bin/sh
/usr/sbin/keepalived -n -l -D -f /etc/keepalived/keepalived.conf --dont-fork --log-console &
nginx -g "daemon off;"- Всё готово для запуска, запускаем кластер контейнеров
root@sid-Easynote-TE69CX:/home/sid/r2.1# docker-compose up
Creating network "r21_static-network" with the default driver
Creating r21_nginx_master2_1 ... done
Creating r21_proxy1_1 ... done
Creating r21_nginx_slave2_1 ... done
Creating r21_nginx_master1_1 ... done
Creating r21_proxy2_1 ... done
Creating r21_nginx_slave1_1 ... done
Attaching to r21_nginx_master2_1, r21_nginx_master1_1, r21_proxy2_1, r21_nginx_slave1_1, r21_nginx_slave2_1, r21_proxy1_1
nginx_master1_1 | Starting Keepalived v1.2.24 (11/19,2016), git commit v3.5.0_rc2-45-g813ce7d+
nginx_master1_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_master1_1 | Starting Healthcheck child process, pid=9
nginx_master1_1 | Starting VRRP child process, pid=10
nginx_master1_1 | Initializing ipvs
nginx_master1_1 | Netlink reflector reports IP 172.20.128.2 added
nginx_master1_1 | Registering Kernel netlink reflector
nginx_master1_1 | Registering Kernel netlink command channel
nginx_master1_1 | Registering gratuitous ARP shared channel
nginx_master1_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_master1_1 | VRRP_Instance(VI_1) removing protocol VIPs.
nginx_master1_1 | Using LinkWatch kernel netlink reflector...
nginx_master1_1 | VRRP sockpool: [ifindex(102), proto(112), unicast(1), fd(10,11)]
nginx_master1_1 | Netlink reflector reports IP 172.20.128.2 added
nginx_master1_1 | Registering Kernel netlink reflector
nginx_master1_1 | Registering Kernel netlink command channel
nginx_master1_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_master1_1 | Using LinkWatch kernel netlink reflector...
nginx_master1_1 | VRRP_Script(chk_nginx) succeeded
nginx_master2_1 | Starting Keepalived v1.2.24 (11/19,2016), git commit v3.5.0_rc2-45-g813ce7d+
nginx_master2_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_master2_1 | Starting Healthcheck child process, pid=9
nginx_master2_1 | Starting VRRP child process, pid=10
nginx_master2_1 | Netlink reflector reports IP 172.20.127.2 added
nginx_master2_1 | Registering Kernel netlink reflector
nginx_master2_1 | Registering Kernel netlink command channel
nginx_master2_1 | Registering gratuitous ARP shared channel
nginx_master2_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_master2_1 | VRRP_Instance(VI_1) removing protocol VIPs.
nginx_master2_1 | Using LinkWatch kernel netlink reflector...
nginx_master2_1 | VRRP sockpool: [ifindex(100), proto(112), unicast(1), fd(10,11)]
nginx_master2_1 | Initializing ipvs
nginx_master2_1 | Netlink reflector reports IP 172.20.127.2 added
nginx_master2_1 | Registering Kernel netlink reflector
nginx_master2_1 | Registering Kernel netlink command channel
nginx_master2_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_master2_1 | Using LinkWatch kernel netlink reflector...
nginx_master2_1 | VRRP_Script(chk_nginx) succeeded
nginx_slave1_1 | Starting Keepalived v1.2.24 (11/19,2016), git commit v3.5.0_rc2-45-g813ce7d+
nginx_slave1_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_slave1_1 | Starting Healthcheck child process, pid=8
nginx_slave1_1 | Starting VRRP child process, pid=9
nginx_slave2_1 | Starting Keepalived v1.2.24 (11/19,2016), git commit v3.5.0_rc2-45-g813ce7d+
nginx_slave2_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_slave2_1 | Starting Healthcheck child process, pid=9
nginx_slave2_1 | Starting VRRP child process, pid=10
nginx_slave2_1 | Initializing ipvs
nginx_slave2_1 | Netlink reflector reports IP 172.20.127.3 added
nginx_slave2_1 | Registering Kernel netlink reflector
nginx_slave2_1 | Registering Kernel netlink command channel
nginx_slave2_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_slave2_1 | Using LinkWatch kernel netlink reflector...
nginx_slave2_1 | Netlink reflector reports IP 172.20.127.3 added
nginx_slave2_1 | Registering Kernel netlink reflector
nginx_slave2_1 | Registering Kernel netlink command channel
nginx_slave2_1 | Registering gratuitous ARP shared channel
nginx_slave2_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_slave2_1 | VRRP_Instance(VI_1) removing protocol VIPs.
nginx_slave2_1 | Using LinkWatch kernel netlink reflector...
nginx_slave2_1 | VRRP_Instance(VI_1) Entering BACKUP STATE
nginx_slave2_1 | VRRP sockpool: [ifindex(104), proto(112), unicast(1), fd(10,11)]
nginx_slave2_1 | VRRP_Script(chk_nginx) succeeded
nginx_slave1_1 | Netlink reflector reports IP 172.20.128.3 added
nginx_slave1_1 | Registering Kernel netlink reflector
nginx_slave1_1 | Registering Kernel netlink command channel
nginx_slave1_1 | Registering gratuitous ARP shared channel
proxy1_1 | <7>haproxy-systemd-wrapper: executing /usr/local/sbin/haproxy -p /run/haproxy.pid -db -f /usr/local/etc/haproxy/haproxy.cfg -Ds
nginx_slave1_1 | Initializing ipvs
nginx_slave1_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_slave1_1 | VRRP_Instance(VI_1) removing protocol VIPs.
nginx_slave1_1 | Using LinkWatch kernel netlink reflector...
nginx_slave1_1 | Netlink reflector reports IP 172.20.128.3 added
nginx_slave1_1 | VRRP_Instance(VI_1) Entering BACKUP STATE
nginx_slave1_1 | VRRP sockpool: [ifindex(106), proto(112), unicast(1), fd(10,11)]
nginx_slave1_1 | Registering Kernel netlink reflector
nginx_slave1_1 | Registering Kernel netlink command channel
nginx_slave1_1 | Opening file '/etc/keepalived/keepalived.conf'.
nginx_slave1_1 | Using LinkWatch kernel netlink reflector...
nginx_slave1_1 | VRRP_Script(chk_nginx) succeeded
proxy2_1 | <7>haproxy-systemd-wrapper: executing /usr/local/sbin/haproxy -p /run/haproxy.pid -db -f /usr/local/etc/haproxy/haproxy.cfg -Ds
nginx_master2_1 | VRRP_Instance(VI_1) Transition to MASTER STATE
nginx_master1_1 | VRRP_Instance(VI_1) Transition to MASTER STATE
nginx_master2_1 | VRRP_Instance(VI_1) Entering MASTER STATE
nginx_master2_1 | VRRP_Instance(VI_1) setting protocol VIPs.
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Netlink reflector reports IP 172.20.127.4 added
nginx_master2_1 | VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master1_1 | VRRP_Instance(VI_1) Entering MASTER STATE
nginx_master1_1 | VRRP_Instance(VI_1) setting protocol VIPs.
nginx_master1_1 | Netlink reflector reports IP 172.20.128.4 added
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master2_1 | Sending gratuitous ARP on eth0 for 172.20.127.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4
nginx_master1_1 | Sending gratuitous ARP on eth0 for 172.20.128.4- Проверяем доступность в браузере и выключаем кластер
[loadbalancers]
nginx_master1_1 | 172.20.0.3 - - [14/Aug/2022:15:39:16 +0000] "GET / HTTP/1.1" 304 0 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0" "-"
nginx_master2_1 | 172.20.0.2 - - [14/Aug/2022:15:39:18 +0000] "GET / HTTP/1.1" 304 0 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:103.0) Gecko/20100101 Firefox/103.0" "-"
^CGracefully stopping... (press Ctrl+C again to force)
Stopping r21_nginx_master1_1 ... done
Stopping r21_nginx_slave1_1 ... done
Stopping r21_proxy2_1 ... done
Stopping r21_nginx_master2_1 ... done
Stopping r21_nginx_slave2_1 ... done
Stopping r21_proxy1_1 ... done
root@sid-Easynote-TE69CX:/home/sid/r2.1# docker-compose down
Removing r21_nginx_master1_1 ... done
Removing r21_nginx_slave1_1 ... done
Removing r21_proxy2_1 ... done
Removing r21_nginx_master2_1 ... done
Removing r21_nginx_slave2_1 ... done
Removing r21_proxy1_1 ... done
Removing network r21_static-network- Запустим контейнерную среду в фоновом режиме
root@sid-Easynote-TE69CX:/home/sid/r2.1# docker-compose up -d
Creating network "r21_static-network" with the default driver
Creating r21_nginx_slave1_1 ... done
Creating r21_proxy2_1 ... done
Creating r21_nginx_master1_1 ... done
Creating r21_proxy1_1 ... done
Creating r21_nginx_master2_1 ... done
Creating r21_nginx_slave2_1 ... done- Так выглядит список всех докер контейнеров в системе
root@sid-Easynote-TE69CX:/home/sid/r2.1# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
671bd2bd4468 r21_nginx_slave2 "/entrypoint.sh" 5 minutes ago Up 5 minutes 80/tcp r21_nginx_slave2_1
5354f573098b haproxy:1.7-alpine "docker-entrypoint.s…" 5 minutes ago Up 5 minutes 0.0.0.0:8000->6301/tcp, :::8000->6301/tcp r21_proxy1_1
aed11a843e42 r21_nginx_master2 "/entrypoint.sh" 5 minutes ago Up 5 minutes 80/tcp r21_nginx_master2_1
6c8bfdbd493d r21_nginx_master1 "/entrypoint.sh" 5 minutes ago Up 5 minutes 80/tcp r21_nginx_master1_1
c6cb2613e7ad haproxy:1.7-alpine "docker-entrypoint.s…" 5 minutes ago Up 5 minutes 0.0.0.0:8001->6301/tcp, :::8001->6301/tcp r21_proxy2_1
0ec7fd1f1417 r21_nginx_slave1 "/entrypoint.sh" 5 minutes ago Up 5 minutes 80/tcp r21_nginx_slave1_1- Теперь имитируем ситуацию, когда один из хостов nginx упал, остановим r21_nginx_master1
root@sid-Easynote-TE69CX:/home/sid/r2.1# docker pause 6c8bfdbd493d
6c8bfdbd493dСервер доступен
Задача выполнена
Написать роль на Ansible по развёртыванию стенда из Задание 2.1. Должен быть описан файл инвентори с серверами по примеру:
[loadbalancers]
ha1 ansible_host=10.10.1.1
ha2 ansible_host=10.10.1.2
[webservers]
web1 ansible_host=10.10.1.1
web2 ansible_host=10.10.1.2Можно написать 1 большую роль, либо 3 роли и потом вызвать их поочёрдно. Роль Nginx – устанавливает и конфигурирует Nginx на группе хостов [webservers]. Роль HA Proxy – устанавливает и конфигурирует HA Proxy на группе хостов [loadbalancers]. Роль Keepalived – устанавливает и конфигурирует Keepalived на группе хостов [loadbalancers]. Конфиги nginx, HA proxy, keepalived оформить, используя шаблоны Jinja2(язык шаблонов). Пример использования шаблонов Jinja2: В каталоге /roles/nginx/templates создаётся конфиг nginx.conf, далее в роле мы используем данный конфиг
- name: Add nginx config
template:
src=template/nginx.conf
dest=/etc/nginx/nginx.confИтоговый playbook объединяющий три роли может выглядеть следующим образом.
- hosts: webservers
become: yes
roles:
- nginx
- hosts: loadbalancers
become: yes
roles:
- ha-proxy
- hosts: loadbalancers
become: yes
roles:
- keepalivedЗапуск итогового playbook примерно выглядит так
Ansible-playbook –i <inventory_file> nginx_haproxy_ha.yml- Ссылка на VirtualBox: https://www.virtualbox.org/wiki/Downloads
- Ссылка на VMware workstation player: https://www.vmware.com/ru/products/workstation-player/workstation-player-evaluation.html
- Ссылка на Centos: https://www.centos.org/download/
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