Move installation scripts out of release info

[serathius]

What would you like to be added?

Installation script should be moved into either etcd.io or etcd repo. Options:

• Update https://etcd.io/docs/v3.5/install/ and link to it from release
• Add script to repo that can be executed directly from . Execution by calling

  wget https://raw.githubusercontent.com/etcd-io/etcd/v3.5.7/projects/scripts/install.sh
  chmod +x ./install.sh
  ./install.sh
  

  or more extreme

  bash < <(curl -s -S -L https://raw.githubusercontent.com/etcd-io/etcd/v3.5.7/projects/scripts/install.sh)
  

Prefer first option as second doesn't allow user good chance to read what script is doing.

Why is this needed?

From time to time we need to make a fix in release script and as it's separate for each release it's very toilsome. During release maintainer copies it from last release and needs to manually update version which is error prone as there are a lot of references to version. If change is script needs to be done it needs to be done by maintainers as release info is not stored in repository.

All those things result in install script being not very maintained and low quality.

[pchan]

Created a PR (#15267) that adds the installation script. Please review, I will update the website v3.6 docs ? post review.

[serathius]

Would be good to check what other project do in this regard.

[pchan]

Would be good to check what other project do in this regard.

Analyzed 2 examples

1. Build from source, as in, use "make" to build and then install ? (like (runc. Currently we install to a temp directory.
2. Other option is to install with popular package managers (e.g. kubeadm binaries)

[stale]

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