Chart fails to deploy, because ".Values.namespace.name" field does not exist

[kosiek]

Short description

Chart: personal-ovpn

I've encountered a failed Helm deployment, using Helm Controller that is bundled with the Rancher's k3OS. The chart fails to install with Errors.

Reproduction scenario

The following preconditions are assumed:

• Rancher's k3OS is deployed
• A namespace vpn is created
• A Helm chart .yaml file is created, similar to this:

apiVersion: helm.cattle.io/v1
kind: HelmChart
metadata:
  namespace: kube-system
  name: ovpn-test
spec:
  chart: personal-ovpn
  repo: https://suda.github.io/charts/
  version: 0.2.1
  targetNamespace: vpn
  valuesContent: |-
    limitTraficToNamespace: false
    service:
      port: 33333
      protocol: TCP
      type: LoadBalancer
    namespace: vpn

• The following Helm chart definition is then deployed using kubectl apply -f $CHART_FILE_NAME

Expected output

A Helm deployment job is successful

Actual output

A Helm job fails with the following logs:

myclusternodeX [~]$ sudo cat /var/log/pods/kube-system_helm-install-ovpn-test-fd7hr_c242e696-14e4-4690-8c9d-fa31300583b4/helm/2.log 
2021-02-02T21:45:15.347897022Z stderr F CHART=$(sed -e "s/%{KUBERNETES_API}%/${KUBERNETES_SERVICE_HOST}:${KUBERNETES_SERVICE_PORT}/g" <<< "${CHART}")
2021-02-02T21:45:15.349514629Z stderr F set +v -x
2021-02-02T21:45:15.350334636Z stderr F + cp /var/run/secrets/kubernetes.io/serviceaccount/ca.crt /usr/local/share/ca-certificates/
2021-02-02T21:45:15.35061082Z stderr F + update-ca-certificates
2021-02-02T21:45:15.367185078Z stderr F WARNING: ca-certificates.crt does not contain exactly one certificate or CRL: skipping
2021-02-02T21:45:15.383426801Z stderr F + + export HELM_HOST=127.0.0.1:44134tiller 
2021-02-02T21:45:15.383471501Z stderr F --listen=127.0.0.1:44134 --storage=secret
2021-02-02T21:45:15.383477765Z stderr F + HELM_HOST=127.0.0.1:44134
2021-02-02T21:45:15.383483601Z stderr F + helm_v2 init --skip-refresh --client-only
2021-02-02T21:45:15.460058321Z stdout F Creating /root/.helm 
2021-02-02T21:45:15.460160847Z stdout F Creating /root/.helm/repository 
2021-02-02T21:45:15.460232088Z stdout F Creating /root/.helm/repository/cache 
2021-02-02T21:45:15.460240033Z stdout F Creating /root/.helm/repository/local 
2021-02-02T21:45:15.460297005Z stdout F Creating /root/.helm/plugins 
2021-02-02T21:45:15.460344427Z stdout F Creating /root/.helm/starters 
2021-02-02T21:45:15.460394823Z stdout F Creating /root/.helm/cache/archive 
2021-02-02T21:45:15.460514278Z stdout F Creating /root/.helm/repository/repositories.yaml 
2021-02-02T21:45:15.460522769Z stdout F Adding stable repo with URL: https://kubernetes-charts.storage.googleapis.com 
2021-02-02T21:45:15.460585873Z stdout F Adding local repo with URL: http://127.0.0.1:8879/charts 
2021-02-02T21:45:15.461358496Z stdout F $HELM_HOME has been configured at /root/.helm.
2021-02-02T21:45:15.46136867Z stdout F Not installing Tiller due to 'client-only' flag having been set
2021-02-02T21:45:15.462971111Z stderr F ++ jq -r '.Releases | length'
2021-02-02T21:45:15.465240575Z stderr F ++ helm_v2 ls --all '^ovpn-test$' --output json
2021-02-02T21:45:15.471242178Z stderr F [main] 2021/02/02 21:45:15 Starting Tiller v2.16.8 (tls=false)
2021-02-02T21:45:15.471270559Z stderr F [main] 2021/02/02 21:45:15 GRPC listening on 127.0.0.1:44134
2021-02-02T21:45:15.471289759Z stderr F [main] 2021/02/02 21:45:15 Probes listening on :44135
2021-02-02T21:45:15.471295144Z stderr F [main] 2021/02/02 21:45:15 Storage driver is Secret
2021-02-02T21:45:15.47129974Z stderr F [main] 2021/02/02 21:45:15 Max history per release is 0
2021-02-02T21:45:15.553812936Z stderr F [storage] 2021/02/02 21:45:15 listing all releases with filter
2021-02-02T21:45:15.572998569Z stderr F + EXIST=
2021-02-02T21:45:15.573115763Z stderr F + '[' '' == 1 ']'
2021-02-02T21:45:15.573126368Z stderr F + '[' '' == v2 ']'
2021-02-02T21:45:15.573131538Z stderr F + shopt -s nullglob
2021-02-02T21:45:15.573136487Z stderr F + helm_content_decode
2021-02-02T21:45:15.573198665Z stderr F + set -e
2021-02-02T21:45:15.573206412Z stderr F + ENC_CHART_PATH=/chart/ovpn-test.tgz.base64
2021-02-02T21:45:15.573211875Z stderr F + CHART_PATH=/ovpn-test.tgz
2021-02-02T21:45:15.573264394Z stderr F + '[' '!' -f /chart/ovpn-test.tgz.base64 ']'
2021-02-02T21:45:15.573272432Z stderr F + return
2021-02-02T21:45:15.573329266Z stderr F + '[' install '!=' delete ']'
2021-02-02T21:45:15.573339094Z stderr F + helm_repo_init
2021-02-02T21:45:15.573391725Z stderr F + grep -q -e 'https\?://'
2021-02-02T21:45:15.579098949Z stderr F + '[' helm_v3 == helm_v3 ']'
2021-02-02T21:45:15.579155168Z stderr F + [[ personal-ovpn == stable/* ]]
2021-02-02T21:45:15.579162805Z stderr F + '[' -n https://suda.github.io/charts/ ']'
2021-02-02T21:45:15.579214524Z stderr F + helm_v3 repo add ovpn-test https://suda.github.io/charts/
2021-02-02T21:45:15.80826059Z stdout F "ovpn-test" has been added to your repositories
2021-02-02T21:45:15.809719982Z stderr F + helm_v3 repo update
2021-02-02T21:45:15.847143569Z stdout F Hang tight while we grab the latest from your chart repositories...
2021-02-02T21:45:16.027848638Z stdout F ...Successfully got an update from the "ovpn-test" chart repository
2021-02-02T21:45:16.027892617Z stdout F Update Complete. ⎈ Happy Helming!⎈ 
2021-02-02T21:45:16.029283003Z stderr F + helm_update install --namespace test --repo https://suda.github.io/charts/ --version 0.2.1
2021-02-02T21:45:16.029427058Z stderr F + '[' helm_v3 == helm_v3 ']'
2021-02-02T21:45:16.030248021Z stderr F ++ helm_v3 ls --all-namespaces --all -f '^ovpn-test$' --output json
2021-02-02T21:45:16.031857147Z stderr F ++ tr '[:upper:]' '[:lower:]'
2021-02-02T21:45:16.03265807Z stderr F ++ jq -r '"\(.[0].app_version),\(.[0].status)"'
2021-02-02T21:45:16.111399444Z stderr F + LINE=null,null
2021-02-02T21:45:16.11224357Z stderr F ++ echo null,null
2021-02-02T21:45:16.112847348Z stderr F ++ cut -f1 -d,
2021-02-02T21:45:16.11361461Z stderr F + INSTALLED_VERSION=null
2021-02-02T21:45:16.114109339Z stderr F ++ echo null,null
2021-02-02T21:45:16.114555626Z stderr F ++ cut -f2 -d,
2021-02-02T21:45:16.115089185Z stderr F + STATUS=null
2021-02-02T21:45:16.115159057Z stderr F + VALUES=
2021-02-02T21:45:16.11526811Z stderr F + for VALUES_FILE in /config/*.yaml
2021-02-02T21:45:16.11527702Z stderr F + VALUES=' --values /config/values-01_HelmChart.yaml'
2021-02-02T21:45:16.115282485Z stderr F + '[' install = delete ']'
2021-02-02T21:45:16.115450971Z stderr F + '[' -z null ']'
2021-02-02T21:45:16.115745586Z stderr F + '[' null = deployed ']'
2021-02-02T21:45:16.116021803Z stderr F + '[' null = failed ']'
2021-02-02T21:45:16.116145788Z stderr F + '[' null = deleted ']'
2021-02-02T21:45:16.116457441Z stderr F + helm_v3 install --namespace test --repo https://suda.github.io/charts/ --version 0.2.1 ovpn-test personal-ovpn --values /config/values-01_HelmChart.yaml
2021-02-02T21:45:17.092620108Z stderr F Error: template: personal-ovpn/templates/tests/test-connection.yaml:5:23: executing "personal-ovpn/templates/tests/test-connection.yaml" at <.Values.namespace.name>: can't evaluate field name in type interface {}

Workaround

The steps to create a workaround that I made, are the following:

• Set up a temporary HTTPS webserver on the local network, e.g. http://mytempwebserver.mynetwork.local/charts/
• Replace all occurences of .Values.namespace.name with .Values.namespace, within this repo
• Build the chart by using helm package ./personal-ovpn-fix && mv ./personal-ovpn-0.2.2.tgz charts/
• Refresh the index by executing helm repo index ./charts/
• Copy the .tgz archive and index.yaml to the webserver's directory
• replace the spec.repo field's value with address of the temporary webserver
• Execute the .yaml definition with kubectl apply -f (...)

Observation: the deployment succeeds.