refactor: remover todas as dependências do GitLab no workshop

- Aula 08: nginx-ingress TCP passthrough gitlab→gitea, comments
- Aula 09: add-client.sh API GitLab→Gitea
- Aula 11: node-bugado deployment image registry.kube.quest→gitea.kube.quest
- Aula 12: setup.sh/cleanup.sh API GitLab→Gitea, ArgoCD repoURL
- Aula 13: k8s manifests, benchmarks: registry.kube.quest→gitea.kube.quest,
           gitlab-registry→gitea-registry, GITLAB_TOKEN→GITEA_TOKEN
- Aula 14: comments GitLab→Gitea
- README raiz: arquitetura, tabela, DNS

aula-13/benchmarks/benchmark-clean.sh

@@ -11,7 +11,7 @@
 set -e
 
 NAMESPACE="benchmark-clean"
-ESTARGZ_IMAGE="registry.kube.quest/factory/postgresql:17"
+ESTARGZ_IMAGE="gitea.kube.quest/factory/postgresql:17"
 TRADITIONAL_IMAGE="postgres:17-alpine"
 TARGET_NODE="talos-msadg4-worker-0"  # Node sem cache
 
@@ -39,10 +39,10 @@ echo "      Ambiente limpo"
 # Criar namespace
 echo "[3/6] Criando namespace de teste..."
 kubectl create namespace $NAMESPACE
-kubectl create secret docker-registry gitlab-registry \
-    --docker-server=registry.kube.quest \
+kubectl create secret docker-registry gitea-registry \
+    --docker-server=gitea.kube.quest \
     --docker-username=root \
-    --docker-password="${GITLAB_TOKEN:-glpat-dummy}" \
+    --docker-password="${GITEA_TOKEN:-glpat-dummy}" \
     -n $NAMESPACE 2>/dev/null || true
 echo "      Namespace criado"
 
@@ -103,7 +103,7 @@ spec:
   nodeName: $TARGET_NODE
   restartPolicy: Never
   imagePullSecrets:
-  - name: gitlab-registry
+  - name: gitea-registry
   containers:
   - name: postgres
     image: $ESTARGZ_IMAGE

aula-13/benchmarks/benchmark-postgresql.sh

@@ -5,7 +5,7 @@
 #
 # Compara tempo de startup entre:
 #   - postgres:17-alpine (gzip tradicional)
-#   - registry.kube.quest/factory/postgresql:17 (eStargz)
+#   - gitea.kube.quest/factory/postgresql:17 (eStargz)
 #
 # Este script usa timestamps dos eventos do Kubernetes para medir:
 #   - Tempo de pull (Pulling -> Pulled)
@@ -16,7 +16,7 @@
 set -e
 
 NAMESPACE="benchmark-test"
-ESTARGZ_IMAGE="registry.kube.quest/factory/postgresql:17"
+ESTARGZ_IMAGE="gitea.kube.quest/factory/postgresql:17"
 TRADITIONAL_IMAGE="postgres:17-alpine"
 
 echo "========================================================================"
@@ -41,10 +41,10 @@ echo "      Ambiente limpo"
 # Criar namespace
 echo "[3/6] Criando namespace de teste..."
 kubectl create namespace $NAMESPACE
-kubectl create secret docker-registry gitlab-registry \
-    --docker-server=registry.kube.quest \
+kubectl create secret docker-registry gitea-registry \
+    --docker-server=gitea.kube.quest \
     --docker-username=root \
-    --docker-password="${GITLAB_TOKEN:-glpat-dummy}" \
+    --docker-password="${GITEA_TOKEN:-glpat-dummy}" \
     -n $NAMESPACE 2>/dev/null || true
 echo "      Namespace criado"
 
@@ -74,7 +74,7 @@ T2_START=$(date +%s)
 
 kubectl run pg-estargz --image=$ESTARGZ_IMAGE --restart=Never \
     --env=POSTGRES_PASSWORD=benchmarktest \
-    --overrides='{"spec":{"imagePullSecrets":[{"name":"gitlab-registry"}]}}' \
+    --overrides='{"spec":{"imagePullSecrets":[{"name":"gitea-registry"}]}}' \
     -n $NAMESPACE 2>&1 | grep -v "Warning:"
 
 kubectl wait --for=condition=Ready pod/pg-estargz -n $NAMESPACE --timeout=180s

aula-13/benchmarks/benchmark-pull-only.sh

@@ -11,7 +11,7 @@
 set -e
 
 NAMESPACE="benchmark-pull"
-ESTARGZ_IMAGE="registry.kube.quest/factory/postgresql:17"
+ESTARGZ_IMAGE="gitea.kube.quest/factory/postgresql:17"
 TRADITIONAL_IMAGE="postgres:17-alpine"
 TARGET_NODE="worker-pool-6bea48339a15ab6e"  # Node 128.140.11.113 - sem cache
 
@@ -25,10 +25,10 @@ echo ""
 # Setup
 kubectl delete namespace $NAMESPACE --ignore-not-found=true --wait=true 2>/dev/null || true
 kubectl create namespace $NAMESPACE
-kubectl create secret docker-registry gitlab-registry \
-    --docker-server=registry.kube.quest \
+kubectl create secret docker-registry gitea-registry \
+    --docker-server=gitea.kube.quest \
     --docker-username=root \
-    --docker-password="${GITLAB_TOKEN:-glpat-dummy}" \
+    --docker-password="${GITEA_TOKEN:-glpat-dummy}" \
     -n $NAMESPACE 2>/dev/null || true
 
 echo ""
@@ -85,7 +85,7 @@ spec:
   nodeName: $TARGET_NODE
   restartPolicy: Never
   imagePullSecrets:
-  - name: gitlab-registry
+  - name: gitea-registry
   containers:
   - name: postgres
     image: $ESTARGZ_IMAGE

aula-13/benchmarks/benchmark-toolbox.sh

@@ -9,7 +9,7 @@
 set -e
 
 NAMESPACE="benchmark-toolbox"
-REGISTRY="registry.kube.quest"
+REGISTRY="gitea.kube.quest"
 IMAGE_NAME="factory/devops-toolbox"
 
 # Cores
@@ -50,7 +50,7 @@ spec:
       imagePullPolicy: Always
   restartPolicy: Never
   imagePullSecrets:
-    - name: gitlab-registry
+    - name: gitea-registry
 EOF
 
     # Medir tempo até completar
@@ -85,12 +85,12 @@ main() {
     kubectl create namespace $NAMESPACE 2>/dev/null || true
 
     # Copiar secret do registry
-    if kubectl get secret gitlab-registry -n gitlab &>/dev/null; then
-        kubectl get secret gitlab-registry -n gitlab -o yaml | \
-            sed "s/namespace: gitlab/namespace: $NAMESPACE/" | \
+    if kubectl get secret gitea-registry -n gitea &>/dev/null; then
+        kubectl get secret gitea-registry -n gitea -o yaml | \
+            sed "s/namespace: gitea/namespace: $NAMESPACE/" | \
             kubectl apply -f - 2>/dev/null || true
     else
-        log_warn "Secret gitlab-registry não encontrado. Usando imagens públicas."
+        log_warn "Secret gitea-registry não encontrado. Usando imagens públicas."
     fi
 
     echo ""