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feat(nomad): improved nomad support (#798)
This PR adds better support for our integration with Nomad. Although not officially supported, we would like to improve the developer experience and integrate automated e2e tests to avoid breaking Nomad integrations with future csi-driver releases. The Terraform module for creating a Nomad (+Consul) cluster on Hetzner Cloud can be found [here](https://github.com/hetznercloud/nomad-dev-env). --------- Co-authored-by: Julian Tölle <julian.toelle@hetzner-cloud.de> Co-authored-by: Jonas L. <jooola@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,56 @@ | ||
| # Nomad | ||
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| Hetzner Cloud does not provide official support for running the CSI driver in Nomad. Nonetheless, we would still like to offer a satisfying developer experience and have automated e2e tests to avoid breaking Nomad accidentally. | ||
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| ## Nomad Development Environment | ||
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| As a prerequisite for developing Nomad, a setup of the [`nomad-dev-env`](https://github.com/hetznercloud/nomad-dev-env) is necessary, which is located in `nomad/dev`. | ||
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| 1. Setup the `HCLOUD_TOKEN` environment variable | ||
| 2. Deploy the development cluster: | ||
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| ```bash | ||
| make -C nomad/dev up | ||
| ``` | ||
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| 3. Load the generated configuration to access the development cluster: | ||
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| ```bash | ||
| source nomad/dev/files/env.sh | ||
| ``` | ||
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| 4. Check that the cluster is healthy: | ||
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| ```bash | ||
| nomad node status | ||
| ``` | ||
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| ## Skaffold | ||
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| Skaffold commands should be executed from the `csi-driver` root directory and use the `-f` flag to point to the Nomad specific `skaffold.yaml`. | ||
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| ```bash | ||
| skaffold -f nomad/skaffold.yaml build | ||
| ``` | ||
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| Skaffold does not offer any native support for Nomad. For this reason we use the Nomad post build hooks to deploy/redeploy the csi plugin. To delete the csi plugin a manual execution of `stop_nomad.sh` is necessary. | ||
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| ```bash | ||
| bash ./nomad/stop_nomad.sh | ||
| ``` | ||
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| ## E2E Tests | ||
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| The nomad e2e tests are located in `test/e2e/nomad` and need a working development environment. | ||
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| 1. Deploy the csi-driver | ||
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| ```bash | ||
| skaffold -f nomad/skaffold.yaml build | ||
| ``` | ||
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| 2. Run the e2e tests | ||
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| ```bash | ||
| go test -v -tags e2e ./test/e2e/nomad/... | ||
| ``` |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,6 @@ | ||
| .terraform/ | ||
| terraform.tfstate* | ||
| .terraform.tfstate* | ||
| *.auto.tfvars | ||
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| files/ |
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| Original file line number | Diff line number | Diff line change |
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| SHELL = bash | ||
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| ENV ?= dev | ||
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| env.auto.tfvars: | ||
| @echo 'hcloud_token = "$(HCLOUD_TOKEN)"' >> "$@" | ||
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| .terraform: | ||
| tofu init | ||
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| validate: .terraform | ||
| tofu validate | ||
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| up: .terraform env.auto.tfvars | ||
| tofu apply -auto-approve | ||
| $(MAKE) port-forward | ||
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| down: .terraform env.auto.tfvars | ||
| if test -f files/registry-port-forward.sh; then files/registry-port-forward.sh down; fi | ||
| tofu destroy -auto-approve | ||
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| port-forward: | ||
| files/registry-port-forward.sh up | ||
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| clean: | ||
| rm -Rf files/ .terraform/ terraform.tfstate* env.auto.tfvars |
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| Original file line number | Diff line number | Diff line change |
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| module "dev" { | ||
| source = "github.com/hetznercloud/nomad-dev-env?ref=v0.1.0" # renovate: datasource=github-releases depName=hetznercloud/nomad-dev-env | ||
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| hcloud_token = var.hcloud_token | ||
| } |
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| variable "hcloud_token" { | ||
| sensitive = true | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| job "hcloud-csi-controller" { | ||
| datacenters = ["dc1"] | ||
| namespace = "default" | ||
| type = "service" | ||
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| group "controller" { | ||
| count = 1 | ||
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| constraint { | ||
| distinct_hosts = true | ||
| } | ||
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| update { | ||
| max_parallel = 1 | ||
| canary = 1 | ||
| min_healthy_time = "10s" | ||
| healthy_deadline = "1m" | ||
| auto_revert = true | ||
| auto_promote = true | ||
| } | ||
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| task "plugin" { | ||
| driver = "docker" | ||
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| config { | ||
| image = "$SKAFFOLD_IMAGE" | ||
| command = "bin/hcloud-csi-driver-controller" | ||
| } | ||
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| env { | ||
| CSI_ENDPOINT = "unix://csi/csi.sock" | ||
| ENABLE_METRICS = true | ||
| } | ||
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| template { | ||
| data = <<EOH | ||
| HCLOUD_TOKEN="{{ with nomadVar "secrets/hcloud" }}{{ .hcloud_token }}{{ end }}" | ||
| EOH | ||
| destination = "${NOMAD_SECRETS_DIR}/hcloud-token.env" | ||
| env = true | ||
| } | ||
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| csi_plugin { | ||
| id = "csi.hetzner.cloud" | ||
| type = "controller" | ||
| mount_dir = "/csi" | ||
| } | ||
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| resources { | ||
| cpu = 100 | ||
| memory = 64 | ||
| } | ||
| } | ||
| } | ||
| } |
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