Error: incompatible versions client[v2.9.1] server[v2.8.2]

[ajindal3]

Output of helm version: client - v2.9.1, server v2.8.2

Output of kubectl version: client :- v1.11.2, server:- v1.9.7
Cloud Provider/Platform (AKS, GKE, Minikube etc.): AKS

when I am trying with helm ls --tiller-namespace=<namespace> getting error like Error: incompatible versions client[v2.9.1] server[v2.8.2]. I am a mac book user (installed via brew) and not sure how to downgrade my client version of helm since could not get much help onto it through online. Kindly advise.

[bacongobbler]

@ajindal3 with homebrew, you can downgrade to a previously installed version of helm via brew switch, or you can upgrade tiller to v2.9.1 via helm init --upgrade. Homebrew is a "rolling release" upgrade model in that you cannot install a specific version at a certain point in time without forking the formula or homebrew formula repository and checking out an older version of the formula.

[technosophos]

I left a long explanation for why we don't currently do this on #4549.

[bacongobbler]

this is also a dupe of #1523, so closing this. Thanks @technosophos for the detailed response!

[ajindal3]

I can see that issue has been closed but I am still struggling to find the brew formula to install a specific helm version i.e., 2.8.2. Since when I do brew install kubernetes-helm, by default it installs the latest version and I don't know how to downgrade my local helm version.

Also, I don't have permission to upgrade tiller.

[bacongobbler]

https://stackoverflow.com/a/4158763

[bacongobbler]

If you're having trouble with Homebrew, older releases of Helm are available on the releases page. Specifically, Helm 2.8.2 can be found here, and the instructions are available in the documentation.

[ahaurat]

@ajindal3 I was having the same issue as you:

$ helm list
Error: incompatible versions client[v2.10.0] server[v2.9.1]

I hadn't previously installed client[v2.9.1] and thus couldn't just brew switch as suggested by @bacongobbler nor did the SO answer linked above have a solution for that situation. I ended up having to follow the steps in a different answer on that SO question: https://stackoverflow.com/a/17757092/2356383

Which basically says

• Search on Github for the correct kubernetes-helm.rb file for the version I wanted (2.9.1 in my case): https://github.com/Homebrew/homebrew-core/search?q=kubernetes-helm&type=Commits
• Click the commit hash button (78d6425)
• Click the "View" button
• Click the "Raw" button
• And copy the url: https://raw.githubusercontent.com/Homebrew/homebrew-core/78d64252f30a12b6f4b3ce29686ab5e262eea812/Formula/kubernetes-helm.rb

Then I ran the following once I had the url for the correct kubernetes-helm.rb file

$ brew unlink kubernetes-helm
$ brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/78d64252f30a12b6f4b3ce29686ab5e262eea812/Formula/kubernetes-helm.rb
$ brew switch kubernetes-helm 2.9.1

Hope this helps someone.

[germanattanasio]

@ahaurat you are the real MVP

[kevinhcross]

In case is anyone ends up on this ticket after searching and wants a better solution than Homebrew to manage Helm installations I recently came across asdf which has a helm plugin. asdf will let you install and switch between any version of Helm. It will even let you create a .tool-versions file in a directory so that the Helm version used in that tree will be different from the global version.

[TJM]

Why doesn't this just work like brew install kubernetes-helm@v2.9.1 or whatever target version you desire? Is this an issue with homebrew, or helm or _____ ?