fix(minio): fix OIDC and add public access recipes

2025-12-10 13:26:41 +09:00
parent 1924e56ad7
commit a8599b66f4
4 changed files with 197 additions and 2 deletions
--- a/minio/README.md
+++ b/minio/README.md
@@ -221,6 +221,83 @@ just minio::bucket-exists mybucket

 This returns exit code 0 if the bucket exists, 1 otherwise.

+## Public Access
+
+MinIO allows you to configure anonymous (public) access to buckets or specific prefixes for serving static content like images.
+
+### Set Public Download Access
+
+Enable public read access for a bucket or prefix:
+
+```bash
+# Set public access for entire bucket
+just minio::set-public-download mybucket
+
+# Set public access for specific prefix only
+just minio::set-public-download mybucket/public
+```
+
+After setting public access, files can be accessed without authentication:
+
+```text
+https://your-minio-host/mybucket/public/image.png
+```
+
+### Check Public Access Status
+
+View current anonymous access policy:
+
+```bash
+just minio::show-public-access mybucket
+```
+
+Possible values:
+
+- `private`: No anonymous access (default)
+- `download`: Public read access
+- `upload`: Public write access
+- `public`: Public read and write access
+- `custom`: Custom policy applied
+
+### Remove Public Access
+
+Revoke anonymous access:
+
+```bash
+just minio::remove-public-access mybucket/public
+```
+
+### Using mc Commands
+
+```bash
+# Set public download (read-only)
+mc anonymous set download myminio/mybucket/public
+
+# Set public upload (write-only)
+mc anonymous set upload myminio/mybucket/uploads
+
+# Set full public access (read and write)
+mc anonymous set public myminio/mybucket
+
+# Remove public access
+mc anonymous set none myminio/mybucket
+
+# Check current policy
+mc anonymous get myminio/mybucket
+```
+
+### Presigned URLs (Temporary Access)
+
+For temporary access to private objects, use presigned URLs:
+
+```bash
+# Generate URL valid for 7 days
+mc share download myminio/mybucket/private-file.pdf --expire=168h
+
+# Generate upload URL
+mc share upload myminio/mybucket/uploads/ --expire=1h
+```
+
 ## User Management

 ### Create MinIO User
--- a/minio/justfile
+++ b/minio/justfile
@@ -47,6 +47,7 @@ create-root-credentials:
        gomplate -f minio-root-external-secret.gomplate.yaml | kubectl apply -f -

        echo "Waiting for ExternalSecret to sync..."
+        sleep 2
        kubectl wait --for=condition=Ready externalsecret/minio \
            -n ${MINIO_NAMESPACE} --timeout=60s
    else
@@ -96,7 +97,12 @@ install:
            --placeholder="e.g., minio-console.example.com"
        )
    fi
+
+    # Generate OIDC client secret for confidential client
+    OIDC_CLIENT_SECRET=$(just utils::random-password)
+
    just keycloak::create-client realm=${KEYCLOAK_REALM} client_id=${MINIO_OIDC_CLIENT_ID} \
+        client_secret="${OIDC_CLIENT_SECRET}" \
        redirect_url="https://${MINIO_HOST}/oauth_callback,https://${MINIO_CONSOLE_HOST}/oauth_callback"
    just add-keycloak-minio-policy
    just create-namespace
@@ -105,6 +111,28 @@ install:
        pod-security.kubernetes.io/enforce=restricted --overwrite

    just create-root-credentials
+
+    # Store OIDC client secret
+    if helm status external-secrets -n ${EXTERNAL_SECRETS_NAMESPACE} &>/dev/null; then
+        echo "Storing OIDC client secret in Vault..."
+        just vault::put minio/oidc client_id="${MINIO_OIDC_CLIENT_ID}" client_secret="${OIDC_CLIENT_SECRET}"
+        kubectl delete externalsecret minio-oidc -n ${MINIO_NAMESPACE} --ignore-not-found
+        gomplate -f minio-oidc-external-secret.gomplate.yaml | kubectl apply -f -
+        echo "Waiting for ExternalSecret to sync..."
+        sleep 2
+        kubectl wait --for=condition=Ready externalsecret/minio-oidc \
+            -n ${MINIO_NAMESPACE} --timeout=60s
+    else
+        echo "Creating OIDC client secret directly..."
+        kubectl delete secret minio-oidc -n ${MINIO_NAMESPACE} --ignore-not-found
+        kubectl create secret generic minio-oidc -n ${MINIO_NAMESPACE} \
+            --from-literal=clientId="${MINIO_OIDC_CLIENT_ID}" \
+            --from-literal=clientSecret="${OIDC_CLIENT_SECRET}"
+        if helm status vault -n ${K8S_VAULT_NAMESPACE} &>/dev/null; then
+            just vault::put minio/oidc client_id="${MINIO_OIDC_CLIENT_ID}" client_secret="${OIDC_CLIENT_SECRET}"
+        fi
+    fi
+
    just add-helm-repo
    gomplate -f minio-values.gomplate.yaml -o minio-values.yaml
    helm upgrade --install minio minio/minio \
@@ -260,3 +288,70 @@ grant-policy user='' policy='':
        mc admin policy attach local ${POLICY} --user=${USER}"

    echo "✅ Policy ${POLICY} granted to user ${USER}"
+
+# Set public download access for a bucket or prefix
+set-public-download path='':
+    #!/bin/bash
+    set -euo pipefail
+    PATH_ARG="{{ path }}"
+    while [ -z "${PATH_ARG}" ]; do
+        PATH_ARG=$(
+            gum input --prompt="Bucket/prefix path: " --width=100 \
+            --placeholder="e.g., my-bucket/public"
+        )
+    done
+
+    ROOT_USER=$(just root-username)
+    ROOT_PASSWORD=$(just root-password)
+
+    kubectl -n ${MINIO_NAMESPACE} exec deploy/minio -- \
+        mc alias set local http://localhost:9000 ${ROOT_USER} ${ROOT_PASSWORD}
+
+    kubectl -n ${MINIO_NAMESPACE} exec deploy/minio -- \
+        mc anonymous set download local/${PATH_ARG}
+
+    echo "✅ Public download access enabled for ${PATH_ARG}"
+
+# Remove public access from a bucket or prefix
+remove-public-access path='':
+    #!/bin/bash
+    set -euo pipefail
+    PATH_ARG="{{ path }}"
+    while [ -z "${PATH_ARG}" ]; do
+        PATH_ARG=$(
+            gum input --prompt="Bucket/prefix path: " --width=100 \
+            --placeholder="e.g., my-bucket/public"
+        )
+    done
+
+    ROOT_USER=$(just root-username)
+    ROOT_PASSWORD=$(just root-password)
+
+    kubectl -n ${MINIO_NAMESPACE} exec deploy/minio -- \
+        mc alias set local http://localhost:9000 ${ROOT_USER} ${ROOT_PASSWORD}
+
+    kubectl -n ${MINIO_NAMESPACE} exec deploy/minio -- \
+        mc anonymous set none local/${PATH_ARG}
+
+    echo "✅ Public access removed from ${PATH_ARG}"
+
+# Show anonymous access policy for a bucket or prefix
+show-public-access path='':
+    #!/bin/bash
+    set -euo pipefail
+    PATH_ARG="{{ path }}"
+    while [ -z "${PATH_ARG}" ]; do
+        PATH_ARG=$(
+            gum input --prompt="Bucket/prefix path: " --width=100 \
+            --placeholder="e.g., my-bucket"
+        )
+    done
+
+    ROOT_USER=$(just root-username)
+    ROOT_PASSWORD=$(just root-password)
+
+    kubectl -n ${MINIO_NAMESPACE} exec deploy/minio -- \
+        mc alias set local http://localhost:9000 ${ROOT_USER} ${ROOT_PASSWORD}
+
+    kubectl -n ${MINIO_NAMESPACE} exec deploy/minio -- \
+        mc anonymous get local/${PATH_ARG}
--- a/minio/minio-oidc-external-secret.gomplate.yaml
+++ b/minio/minio-oidc-external-secret.gomplate.yaml
@@ -0,0 +1,22 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: minio-oidc
+  namespace: {{ .Env.MINIO_NAMESPACE }}
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    name: vault-secret-store
+    kind: ClusterSecretStore
+  target:
+    name: minio-oidc
+    creationPolicy: Owner
+  data:
+    - secretKey: clientId
+      remoteRef:
+        key: minio/oidc
+        property: client_id
+    - secretKey: clientSecret
+      remoteRef:
+        key: minio/oidc
+        property: client_secret
--- a/minio/minio-values.gomplate.yaml
+++ b/minio/minio-values.gomplate.yaml
@@ -7,8 +7,9 @@ existingSecret: "minio"
 oidc:
  enabled: true
  configUrl: "https://{{ .Env.KEYCLOAK_HOST }}/realms/{{ .Env.KEYCLOAK_REALM }}/.well-known/openid-configuration"
-  clientId: "{{ .Env.MINIO_OIDC_CLIENT_ID }}"
-  clientSecret: ""
+  existingClientSecretName: "minio-oidc"
+  existingClientIdKey: "clientId"
+  existingClientSecretKey: "clientSecret"
  claimName: "minioPolicy"
  scopes: "openid,profile,email"
  redirectUri: "https://{{ .Env.MINIO_CONSOLE_HOST }}/oauth_callback"