如何在不更改.rb文件的情况下通过Vagrantfile扩展流浪插件

Question

我在Vagrant中遇到了这样的场景，我想使用ansible_local插件修补ansible如何安装在RHEL 8上(因为存储库设置导致缺少包的某些问题(。事情是这样的。相反，我想使用pip3(尽管我知道我可以使用ansible_local模块使用pip，但由于缺乏特定的存储库，它仍然会出错，所以我想办法修复它(。

在我的流浪者档案中，我有这样的行，

.....
node.vm.provision "ansible_local" do |ansible|
ansible.playbook = ansible_playbook
ansible.verbose = true
ansible.install = true
## Actually this line doesn't suffice my problem since it still errs as pip requires other packages. Please check the *.rb file below
if i == 100
ansible.install_mode = "pip"
ansible.version = "2.9"
#ansible.ansible_rpm_install = Foo
end
end
...
.....

但因为使用pip仍然失败，所以我最终更改了文件/opt/vagrant/embedded/gems/2.2.9/gems/vagrant-2.2.9/plugins/provisioners/ansible/cap/guest/redhat/ansible_install.rb，我所做的就是这样，

cap/guest/redhat/ansible_install.rb
require_relative "../facts"
require_relative "../pip/pip"
module VagrantPlugins
module Ansible
module Cap
module Guest
module RedHat
module AnsibleInstall
def self.ansible_install(machine, install_mode, ansible_version, pip_args, pip_install_cmd = "")
case install_mode
when :pip
pip_setup machine, pip_install_cmd
Pip::pip_install machine, "ansible", ansible_version, pip_args, true
when :pip_args_only
pip_setup machine, pip_install_cmd
Pip::pip_install machine, "", "", pip_args, false
else

// My added part as a quick fix/solution
if machine.config.vm.box == "generic/rhel8"
ansible_rpm_install_rhel8 machine
elsif
ansible_rpm_install machine
end

end
end
private
def self.ansible_rpm_install(machine)
rpm_package_manager = Facts::rpm_package_manager(machine)
epel = machine.communicate.execute "#{rpm_package_manager} repolist epel | grep -q epel", error_check: false
if epel != 0
machine.communicate.sudo 'sudo rpm -i https://dl.fedoraproject.org/pub/epel/epel-release-latest-`rpm -E %dist | sed -n 's/.*el([0-9]).*/1/p'`.noarch.rpm'
end
machine.communicate.sudo "#{rpm_package_manager} -y --enablerepo=epel install ansible"
end
def self.pip_setup(machine, pip_install_cmd = "")
rpm_package_manager = Facts::rpm_package_manager(machine)
machine.communicate.sudo("#{rpm_package_manager} -y install curl gcc libffi-devel openssl-devel python-crypto python-devel python-setuptools")
Pip::get_pip machine, pip_install_cmd
end
def self.pip_setup(machine, pip_install_cmd = "")
rpm_package_manager = Facts::rpm_package_manager(machine)
machine.communicate.sudo("#{rpm_package_manager} -y install curl gcc libffi-devel openssl-devel python-crypto python-devel python-setuptools")
Pip::get_pip machine, pip_install_cmd
end

// My added part as a quick fix/solution
def self.ansible_rpm_install_rhel8(machine)
rpm_package_manager = Facts::rpm_package_manager(machine)
epel = machine.communicate.execute "#{rpm_package_manager} repolist epel | grep -q epel", error_check: false
if epel != 0
machine.communicate.sudo 'sudo rpm -i https://dl.fedoraproject.org/pub/epel/epel-release-latest-`rpm -E %dist | sed -n 's/.*el([0-9]).*/1/p'`.noarch.rpm'
end
machine.communicate.sudo "dnf -y update; dnf -y install python3 python3-pip; pip3 install ansible"
end


end
end
end
end
end
end

So I added a methodself.ansible_rpm_install_rhel8(machine)and did anif..elsifas a solution when box name is"generic/rhel8". This works perfect actually on my end. However, I don't like this approach i.e. changing the file/opt/vagrant/embedded/gems/2.2.9/gems/vagrant-2.2.9/plugins/provisioners/ansible/cap/guest/redhat/ansible_install.rbbecause once it changes or version upgrades, this will be gone. Is there any better way that I can just do this only inside Vagrantfile such that perhaps overriding or extending the class itself? I have no idea how to do this.

Any ideas are welcome.

Thank you!

Answer 1

You can use multiple provisioning sections next one another which will be executed in the order as you defined them in yourVagrantfile.

Instead of patching a plugin, try to prepare your ansible execution accordingly.

Before executing the provisioning part for ansible, execute ashell provisioningas follows:

Vagrant.configure("2") do |node|
# ...
node.vm.provision :shell, path: "fix_repo_and_add_packages.sh"
node.vm.provision "ansible_local" do |ansible|
ansible.playbook = ansible_playbook
ansible.verbose = true
ansible.install = true
## Actually this line doesn't suffice my problem since it still errs as pip requires other packages. Please check the *.rb file below
if i == 100
ansible.install_mode = "pip"
ansible.version = "2.9"
#ansible.ansible_rpm_install = Foo
end
end
end

您的fix_repo_and_add_packages.sh包含丢失的repo的设置，您也可以在此处添加包。

有关shell配置的更多信息，您可以在文档中找到