diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
deleted file mode 100644
index 5a4a5058..00000000
--- a/.github/workflows/actionlint.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: actionlint
-
-on:
-  pull_request:
-    branches: [main]
-    paths:
-      - ".github/workflows/*"
-
-jobs:
-  actionlint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: actionlint
-        run: |
-          bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
-          ./actionlint -color
-        shell: bash
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
deleted file mode 100644
index 6bbc8ce7..00000000
--- a/.github/workflows/codeql-analysis.yml
+++ /dev/null
@@ -1,66 +0,0 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "CodeQL"
-
-on:
-  schedule:
-    - cron: '27 7 * * 4'
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'go' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
-        # Learn more:
-        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
-
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v3
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
deleted file mode 100644
index 780417be..00000000
--- a/.github/workflows/github-pages.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-name: github-pages
-
-on:
-  push:
-    branches:
-      - main
-jobs:
-  deploy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: 3.x
-      - run: pip install mkdocs-material
-      - run: mkdocs gh-deploy --force
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
deleted file mode 100644
index e7c54473..00000000
--- a/.github/workflows/pre-commit.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-name: pre-commit
-on:
-  pull_request:
-
-jobs:
-  pre-commit:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: 3.x
-      - uses: pre-commit/action@v3.0.1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
deleted file mode 100644
index f0e78cdb..00000000
--- a/.github/workflows/release.yml
+++ /dev/null
@@ -1,101 +0,0 @@
-name: release
-
-on:
-  release:
-    types:
-      - published
-
-env:
-  REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
-
-jobs:
-  build-and-push-image:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      packages: write
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-      - name: Log in to the Container registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-
-      - name: Build and push Docker image
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-
-  create-pr-to-update-kustomization:
-    needs: [build-and-push-image]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-        with:
-          ref: 'main'
-
-      - name: Update kustomization
-        run: IMG=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${GITHUB_REF:10} make update-version-to-install
-
-      - name: Set output
-        id: set-output
-        run: echo "RELEASE_VERSION=${GITHUB_REF:10}" >> "$GITHUB_OUTPUT"
-
-      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          title: "chore: bump version to ${{ steps.set-output.outputs.RELEASE_VERSION }} in install/kustomization.yaml"
-          body: |
-            # Why
-            - New version [${{ steps.set-output.outputs.RELEASE_VERSION }}](${{ github.server_url }}/${{ github.repository }}/releases/tag/${{ steps.set-output.outputs.RELEASE_VERSION }}) was released.
-            # What
-            - Update kustomization for installation
-
-  create-pr-for-helm-charts:
-    needs: [build-and-push-image]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-        with:
-          ref: main
-          repository: nakamasato/helm-charts
-
-      - name: Set output
-        id: set-output
-        run: echo "RELEASE_VERSION=${GITHUB_REF:10}" >> "$GITHUB_OUTPUT"
-
-      - name: Update app version
-        run: |
-          yq e -i ".version = \"${{ steps.set-output.outputs.RELEASE_VERSION }}\"" charts/mysql-operator/Chart.yaml
-          yq e -i ".appVersion = \"${{ steps.set-output.outputs.RELEASE_VERSION }}\"" charts/mysql-operator/Chart.yaml
-          yq e -i ".controllerManager.manager.image.tag = \"${{ steps.set-output.outputs.RELEASE_VERSION }}\"" charts/mysql-operator/values.yaml
-
-      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
-        with:
-          token: ${{ secrets.PAT_TO_UPDATE_HELM_CHARTS_REPO }} # when expired, need to update in https://github.com/settings/tokens
-          title: "chore: bump mysql-operator version to ${{ steps.set-output.outputs.RELEASE_VERSION }}"
-          branch: bump-mysql-operator-chart
-          body: |
-            # Why
-            - New version [${{ steps.set-output.outputs.RELEASE_VERSION }}](${{ github.server_url }}/${{ github.repository }}/releases/tag/${{ steps.set-output.outputs.RELEASE_VERSION }}) was released.
-            # What
-            - bump mysql-operator chart version to [${{ steps.set-output.outputs.RELEASE_VERSION }}](${{ github.server_url }}/${{ github.repository }}/releases/tag/${{ steps.set-output.outputs.RELEASE_VERSION }})
diff --git a/.github/workflows/test-build-oracle.yml b/.github/workflows/test-build-oracle.yml
new file mode 100644
index 00000000..e69de29b
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
deleted file mode 100644
index 5b5d02ea..00000000
--- a/.github/workflows/test.yml
+++ /dev/null
@@ -1,168 +0,0 @@
-name: test
-
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-
-jobs:
-  path-filter:
-    outputs:
-      go: ${{steps.changes.outputs.go}}
-      e2e: ${{steps.changes.outputs.e2e}}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-      - uses: dorny/paths-filter@v3
-        id: changes
-        with:
-          filters: |
-            go:
-              - '**.go'
-              - 'go.*'
-              - .github/workflows/test.yml
-            e2e:
-              - Dockerfile
-              - .github/workflows/test.yml
-              - config/crd/**
-              - tests/e2e/**
-              - internal/**
-              - '**.go'
-              - 'go.*'
-              - kuttl-test.yaml
-              - skaffold.yaml
-
-  status-check:
-    runs-on: ubuntu-latest
-    needs:
-      - lint
-      - test
-      - e2e-kuttl
-      - e2e-ginkgo
-    permissions: {}
-    if: failure()
-    steps:
-      - run: exit 1
-
-  lint:
-    needs: path-filter
-    if: needs.path-filter.outputs.go == 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-      - name: setup go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: go.mod
-
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
-        with:
-          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
-          version: latest
-
-          # Optional: golangci-lint command line arguments.
-          args: --timeout=3m # --issues-exit-code=0
-
-  test:
-    needs: path-filter
-    if: needs.path-filter.outputs.go == 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-      - name: setup go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: ./go.mod
-
-      - run: |
-          make test
-          cat cover.out >> coverage.txt
-
-      - name: codecov
-        uses: codecov/codecov-action@v4
-
-  e2e-kuttl:
-    needs: path-filter
-    if: needs.path-filter.outputs.e2e == 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-      - name: setup go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: ./go.mod
-          cache: true
-
-      # https://krew.sigs.k8s.io/docs/user-guide/setup/install/
-      - name: krew - install
-        run: |
-          (
-            set -x; cd "$(mktemp -d)" &&
-            OS="$(uname | tr '[:upper:]' '[:lower:]')" &&
-            ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" &&
-            KREW="krew-${OS}_${ARCH}" &&
-            curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/${KREW}.tar.gz" &&
-            tar zxvf "${KREW}.tar.gz" &&
-            ./"${KREW}" install krew
-          )
-
-      # https://docs.github.com/en/actions/learn-github-actions/workflow-commands-for-github-actions#adding-a-system-path
-      - name: krew - set PATH
-        run: echo "${KREW_ROOT:-$HOME/.krew}/bin:$PATH" >> "$GITHUB_PATH"
-
-      # https://kuttl.dev/docs/cli.html#setup-the-kuttl-kubectl-plugin
-      - name: kuttl - install
-        run: |
-          kubectl krew install kuttl
-          kubectl kuttl -v
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Build with gha
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          push: false # a shorthand for --output=type=registry if set to true
-          load: true # a shorthand for --output=type=docker if set to true
-          tags: mysql-operator:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-
-      - name: kuttl test
-        run: make kuttl
-
-  e2e-ginkgo:
-    needs: path-filter
-    if: needs.path-filter.outputs.e2e == 'true'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-
-      - name: setup go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: ./go.mod
-          cache: true
-
-      - name: install skaffold # TODO: #69 Enable to install skaffold in e2e
-        run: |
-          curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/latest/skaffold-linux-amd64 && \
-          sudo install skaffold /usr/local/bin/
-
-      - name: create kind cluster
-        working-directory: e2e
-        run: kind create cluster --name mysql-operator-e2e --kubeconfig kubeconfig --config kind-config.yml --wait 30s
-
-      - name: skaffold run
-        working-directory: e2e
-        run: skaffold run --kubeconfig kubeconfig
-
-      - name: e2e-with-ginkgo
-        run: make e2e-with-ginkgo