diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..a6e1c53
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,18 @@
+name: 'Geth Action'
+description: 'Private chain of Ethereum for test using geth'
+outputs:
+  rpc_url:
+    description: "url of JSON RPC"
+    value: http://localhost:8546
+  network_id:
+    description: "network id"
+    value: "10412"
+  chain_id:
+    description: "chain id"
+    value: "10412"
+runs:
+  using: "composite"
+  steps:
+    - id: run
+      run: cd ${{ github.action_path }}; docker-compose up -d
+      shell: bash
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..4b55e22
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,30 @@
+# Copyright 2022 Coinbase, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+version: '3'
+
+services:
+  geth-ethereum-mainnet:
+    image: ethereum/client-go:v1.10.23
+    environment:
+      - DEVMODE=true
+    command: [ "--dev", "--dev.period", "0",
+               "--http", "--http.api",
+               "personal,eth,net,web3,debug",
+               "--http.addr", "0.0.0.0",
+               "--datadir", "./data", "--http.vhosts=*"]
+    volumes:
+      - ".docker/geth:/root"
+    ports:
+      - "8546:8545"