{"id":36266,"date":"2023-06-28T09:35:22","date_gmt":"2023-06-28T09:35:22","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=36266"},"modified":"2023-09-01T09:57:10","modified_gmt":"2023-09-01T09:57:10","slug":"helm-lab-7-managing-dependencies-of-helm-charts","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/helm-lab-7-managing-dependencies-of-helm-charts\/","title":{"rendered":"Helm Lab \u2013 7: Managing Dependencies of Helm Charts"},"content":{"rendered":"\n

Managing dependencies is an essential aspect of creating and maintaining Helm charts, especially when building complex applications composed of multiple services or components. Here’s how you can manage dependencies of Helm charts effectively:<\/p>\n\n\n\n

How to Define Helm Chart Dependencies?<\/h2>\n\n\n\n

In your Helm chart, specify the dependencies in either the requirements.yaml<\/code> file (for Helm 2) or the Chart.yaml<\/code> file (for Helm 3).<\/p>\n\n\n\n

    \n
  1. Chart.yaml<\/li>\n\n\n\n
  2. requirements.yaml<\/code><\/li>\n<\/ol>\n\n\n\n

    $ helm repo update
    $ helm repo add bitnami https:\/\/charts.bitnami.com\/bitnami
    $ helm repo add stable https:\/\/charts.helm.sh\/stable<\/p>\n\n\n\n

    Example of Chart.yaml<\/h2>\n\n\n\n
    \n\n\n
    apiVersion: v1\r\nname<\/span>: mychart\r\nversion<\/span>: 1.0<\/span>.0<\/span>\r\ndependencies<\/span>:\r\n- name: mysql\r\n  version<\/span>: 9.12<\/span>.1<\/span>\r\n  repository<\/span>: https:\/\/charts.bitnami.com\/bitnami<\/span>\r\n- name: jenkins\r\n  version<\/span>: 2.5<\/span>.4<\/span>\r\n  repository<\/span>: https:\/\/charts.helm.sh\/stable<\/span>\r\n- name: my-third-chart\r\n  version<\/span>: 0.1<\/span>.0<\/span>\r\n  repository<\/span>: \"file:\/\/\/home\/ubuntu\/charts\/chart-dep\/ourchart\"<\/span><\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \n\n\n\n
    Example of a Chart.yaml file that defines dependencies:<\/h2>\n\n\n\n
    \n\n\n
    apiVersion: v1\nname<\/span>: mychart\nversion<\/span>: 1.0<\/span>.0<\/span>\ndependencies<\/span>:\n- name: my-first-chart\n  version<\/span>: 1.0<\/span>.0<\/span>\n  repository<\/span>: file:\/\/..\/my-first-chart<\/span>\n- name: my-second-chart\n  version<\/span>: 1.0<\/span>.0<\/span>\n  repository<\/span>: https:\/\/artifacthub.io\/<\/span>\n- name: my-third-chart\n  version<\/span>: 1.0<\/span>.0<\/span>\n  repository<\/span>: file:\/\/..\/my-third-chart<\/span><\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \n\n\n\n
    Example of requirements.yaml<\/code><\/h2>\n\n\n
    $ helm repo update\r\n$ helm repo add bitnami https:\/\/charts.bitnami.com\/bitnami<\/span>\r\n$ helm repo add stable https:\/\/charts.helm.sh\/stable<\/span>\n\ndependencies:\r\n- name: mysql\r\n  version<\/span>: 9.12<\/span>.1<\/span>\r\n  repository<\/span>: https:\/\/charts.bitnami.com\/bitnami<\/span>\r\n- name: jenkins\r\n  version<\/span>: 2.5<\/span>.4<\/span>\r\n  repository<\/span>: https:\/\/charts.helm.sh\/stable<\/span>\r\n- name: my-third-chart\r\n  version<\/span>: 0.1<\/span>.0<\/span>\r\n  repository<\/span>: \"file:\/\/\/home\/ubuntu\/charts\/chart-dep\/ourchart\"<\/span><\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    $ helm dependency update
    $ helm dependency list<\/p>\n\n\n\n
    Update Dependencies<\/strong>:<\/h2>\n\n\n\n
    $ helm dependency update
    $ helm dependency list<\/p>\n\n\n\n
    Run the helm dependency update<\/code> command in the directory containing your Helm chart. This command downloads the specified dependencies and stores them in the charts\/<\/code> directory within your chart’s directory.<\/p>\n\n\n
    helm dependency update: \nThis command updates the dependencies for<\/span> a chart. For<\/span> example, the following command will update the dependencies for<\/span> the chart mychart:\n$ helm dependency update mychart\n\nhelm dependency list<\/span>: \nThis command lists the dependencies for<\/span> a chart. For<\/span> example, the following command will list<\/span> the dependencies for<\/span> the chart mychart:\n$ helm dependency list<\/span> mychart\n\nhelm dependency build: \nThis command builds the dependencies for<\/span> a chart. This is useful if<\/span> you are developing a chart and<\/span> want to test it with the latest versions of its dependencies. For<\/span> example, the following command will build the dependencies for<\/span> the chart mychart:\n$ helm dependency build mychart\n\nhelm dependency pull: \nThis command pulls the dependencies for<\/span> a chart. This is useful if<\/span> you want to download the dependencies for<\/span> a chart without installing them. For<\/span> example, the following command will pull the dependencies for<\/span> the chart mychart:\n$ helm dependency pull mychart\n\nhelm dependency upgrade: \nThis command upgrades the dependencies for<\/span> a chart to the latest version. For<\/span> example, the following command will upgrade the dependencies for<\/span> the chart mychart to the latest version:\n$ helm dependency upgrade mychart\n\nhelm dependency list<\/span>-all: \nThis command lists all the dependencies for<\/span> all the charts in a directory. For<\/span> example, the following command will list<\/span> all the dependencies for<\/span> all the charts in the current directory:\n$ helm dependency list<\/span>-all\n\nhelm dependency remove: \nThis command removes a dependency from a chart. For<\/span> example, the following command will remove the dependency my-chart from the chart my-app:\n$ helm dependency remove my-app my-chart<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n