150 lines
7.0 KiB
Clojure
150 lines
7.0 KiB
Clojure
(ns utils.k8s
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(:require
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["@pulumi/kubernetes" :as k8s]
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["@pulumi/pulumi" :as pulumi]
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["@pulumi/vault" :as vault]
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[utils.vault :as vault-utils]
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["@pulumi/docker" :as docker]
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["path" :as path]
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[configs :refer [cfg]]))
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(defn assoc-ins [m path-vals]
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(reduce (fn [acc [path val]] (assoc-in acc path val)) m path-vals))
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(defn make-transformer
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"Given f that takes {:app-name .. :secrets ..}, where :secrets is a plain map
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(already unwrapped inside .apply), return a Helm transformer."
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[f]
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(fn [{:keys [base-values app-name secrets]}]
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(.apply secrets
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(fn [smap]
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(let [m (js->clj smap :keywordize-keys true)
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updates (f {:app-name app-name
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:secrets m})
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after (clj->js (assoc-ins base-values updates))]
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after)))))
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(defn create-secret [provider app-namespace app-name secrets-data]
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(new (.. k8s -core -v1 -Secret) (str app-name "-secrets")
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(clj->js {:metadata {:name (str app-name "-secrets")
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:namespace app-namespace}
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:stringData secrets-data})
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(clj->js {:provider provider})))
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(defn create-image [app-name]
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(let [context-path (.. path (join "." (-> cfg :resource-path)))
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dockerfile-path (.. path (join context-path (str app-name ".dockerfile")))]
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(new (.. docker -Image) app-name
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(clj->js {:build {:context context-path
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:dockerfile dockerfile-path}
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:imageName (str (-> cfg :docker-repo) "/" app-name ":latest")}))))
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(defn create-ns [provider app-namespace]
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(new (.. k8s -core -v1 -Namespace) app-namespace
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(clj->js {:metadata {:name app-namespace}})
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(clj->js {:provider provider})))
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(defn create-chart [provider app-namespace app-name chart-repo helm-fn dependencies transformations ]
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(new (.. k8s -helm -v3 -Chart) app-name
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(clj->js {:chart app-name
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:fetchOpts {:repo chart-repo}
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:namespace app-namespace
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:values helm-fn
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:transformations (if transformations [transformations] [])})
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(clj->js {:provider provider
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:enableServerSideApply false
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:dependsOn dependencies})))
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(defn create-deployment [provider app-namespace app-name app-labels image image-port dependencies]
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(new (.. k8s -apps -v1 -Deployment) app-name
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(clj->js {:metadata {:namespace app-namespace
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:name app-name}
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:spec {:selector {:matchLabels app-labels}
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:replicas 1
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:template {:metadata {:labels app-labels}
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:spec {:containers
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[{:name app-name
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:image image
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:ports [{:containerPort image-port}]}]}}}})
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(clj->js {:provider provider
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:dependsOn dependencies})))
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(defn create-service [provider app-namespace app-name app-labels image-port dependencies]
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(new (.. k8s -core -v1 -Service) app-name
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(clj->js {:metadata {:namespace app-namespace
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:name app-name}
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:spec {:selector app-labels
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:ports [{:port 80 :targetPort image-port}]}})
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(clj->js {:provider provider :dependsOn dependencies})))
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(defn create-ingress [provider app-namespace app-name full-snippet host image-port dependencies]
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(new (.. k8s -networking -v1 -Ingress) app-name
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(clj->js
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{:metadata {:name app-name
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:namespace app-namespace
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:annotations {"caddy.ingress.kubernetes.io/snippet" full-snippet}}
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:spec
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{:ingressClassName "caddy"
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:rules [{:host host
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:http {:paths [{:path "/"
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:pathType "Prefix"
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:backend {:service {:name app-name
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:port {:number image-port}}}}]}}]}})
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(clj->js {:provider provider :dependsOn dependencies})))
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(defn deploy-stack
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"Deploys a versatile stack of K8s resources, including optional Helm charts."
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[& args]
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(let [[component-kws [options]] (split-with keyword? args)
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requested-components (set component-kws)
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{:keys [provider vault-provider pulumi-cfg app-namespace app-name image image-port caddy-snippet vault-load-yaml chart-repo transformations exec-fn helm-values-fn]
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:or {vault-load-yaml false image-port 80 caddy-snippet "" helm-values-fn #(:base-values %) transformations nil}} options
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app-labels {:app app-name}
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full-snippet (str "tls {\n dns cloudflare {env.CLOUDFLARE_API_TOKEN}\n}\n" caddy-snippet)
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prepared-vault-data (when (requested-components :vault-secrets)
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(vault-utils/prepare {:provider provider
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:vault-provider vault-provider
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:app-name app-name
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:app-namespace app-namespace
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:load-yaml vault-load-yaml}))
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{:keys [secrets yaml-values bind-secrets]} (or prepared-vault-data {:secrets nil :yaml-values nil :bind-secrets nil})
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helm-fn (helm-values-fn {:base-values yaml-values
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:secrets (if (some? prepared-vault-data) secrets nil)
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:app-name app-name})
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host (when secrets (.apply secrets #(aget % "host")))
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ns (when (requested-components :namespace)
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(create-ns provider app-namespace))
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docker-image (when (requested-components :docker-image)
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(create-image app-name))
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image (if (some? docker-image) (str (-> cfg :docker-repo) "/" app-name ":latest") image)
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chart (when (requested-components :chart)
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(create-chart provider app-namespace app-name chart-repo helm-fn (vec (filter some? [ns docker-image bind-secrets])) transformations))
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deployment (when (requested-components :deployment)
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(create-deployment provider app-namespace app-name app-labels image image-port [docker-image]))
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service (when (requested-components :service)
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(create-service provider app-namespace app-name app-labels image-port [deployment]))
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app-dependency (or service chart bind-secrets)
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ingress (when (requested-components :ingress) (create-ingress provider app-namespace app-name full-snippet host image-port [app-dependency]))
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execute (when (requested-components :execute)
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(exec-fn (assoc options :dependencies (vec (filter some? [chart ns deployment service ingress docker-image])))))]
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{:namespace ns, :vault-secrets prepared-vault-data, :chart chart, :deployment deployment, :service service, :ingress ingress :execute execute})) |