We need to run multiple versions of kubectl for compatibility with various kubernetes clusters.
It's a bit easier to get and use multiple versions of kubectl using Homebrew than it is using Macports.
With brew, it's simple to:
- Install a bunch of versions of kubectl (in the kubernetes-cli Formula)
- Switch between them as needed
- Pin a particular release so you don't auto-upgrade into incompatibility with your kubernetes cluster(s)
Get the versions and commit IDs from
https://github.com/Homebrew/homebrew-core/commits/master/Formula/kubernetes-cli.rb
or locally from your homebrew-core clone
cd ~/src/github.com/Homebrew/homebrew-core
git log master -- Formula/kubernetes-cli.rb
Then use the commit IDs to fetch a specific version via
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/{commitIDhere}/Formula/kubernetes-cli.rb
(See Example Install Commands below)
If you install a bunch of versions and set environment variable HOMEBREW_NO_INSTALL_CLEANUP, they'll be available for hot brew switch action later.
To keep prior versions around despite brew's new default behavior of automatically running cleanup (nuke) during installs of newer versions, run
export HOMEBREW_NO_INSTALL_CLEANUP=1
or maybe even put it in your .profile || .bashrc if you have the disk for old versions in general.
Between each initial version install, you'll need to unlink each time to make way for the next version
brew install ...
brew unlink kubernetes-cli
brew install ...
brew unlink kubernetes-cli
etc.
Once you have the versions installed, you don't need to unlink to switch between the versions.
To link up a specific version from your available versions
- Check your active version
kubectl version
- Get available versions, short form, using the bogus version trick
brew switch kubernetes-cli 0
- Pick one version
brew switch kubernetes-cli 1.8.5
- Or pick another version
brew switch kubernetes-cli 1.11.3
You could also get versions, long form with other info
brew info kubernetes-cli
Once you're switched to a version you want to stick with for a while, you can pin it to prevent upgrades during a global brew upgrade.
brew pin kubernetes-cli
You'll need to brew unpin kubernetes-cli when you want to move back to the head release. Otherwise, you can switch between previously installed Formula versions while pinned.
Here are some versions' commit IDs all set up for you.
1.18.2
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/d786e80b253cfb783eea72afa07c86b99c101180/Formula/kubernetes-cli.rb
1.17.4
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/7104022700e3c6eff3ea5b3f61f52fb9ebc3800c/Formula/kubernetes-cli.rb
1.16.3
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/944a4a0dff60d13904763a2455e3261eac833691/Formula/kubernetes-cli.rb
1.15.3
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/7ee32113351bbd913b90f9578bcd52dfe85d675e/Formula/kubernetes-cli.rb
1.14.3
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/fcb6cce3bdd37db3c53c2fcbdf9a47671a592c96/Formula/kubernetes-cli.rb
1.13.4
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/1827ebb2fe905c931deb283f7245eaf465c7cbbf/Formula/kubernetes-cli.rb
1.12.3
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/7a371a4d27fa6d80b1e37cac16c2dadcb78c7111/Formula/kubernetes-cli.rb
1.11.3
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/41764e07727d9a86b0f8a077117dc7876ca294c4/Formula/kubernetes-cli.rb
1.10.5
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/d09d97241b17a5e02a25fc51fc56e2a5de74501c/Formula/kubernetes-cli.rb
1.9.6
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/505fcec7a3cf4f1a073b45bc7ae8294649a33f89/Formula/kubernetes-cli.rb
1.8.5
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/e5538d7e7966795ae50cd94678ee7131fad2d7b7/Formula/kubernetes-cli.rb
1.7.6
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/1e866e9cd915c37184c248fb726775ff8a30c91e/Formula/kubernetes-cli.rb
1.6.6
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/4635c994b205a72c9e488b81306d46622fe72b1b/Formula/kubernetes-cli.rb
1.5.5
brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/2d45e95b57c024eb9bda7c6fba9151a28bc0345f/Formula/kubernetes-cli.rb