Split graph-node stack to run independently (#541)

* Split graph-node stack to run independently

* Fix sushiswap subgraph config in fixturenet stack

app/data/stacks/graph-node/README.md

@@ -0,0 +1,153 @@
+# Graph Node
+
+## Setup
+
+Clone required repositories:
+
+```bash
+laconic-so --stack graph-node setup-repositories --pull
+```
+
+Checkout to a non-default branch in the cloned repos if required:
+
+```bash
+# Default repo base dir
+cd ~/cerc
+
+# Example
+cd graph-node
+git checkout <your-branch> && git pull
+
+# Remove the corresponding docker image if it already exists
+docker image rm cerc/graph-node:local
+# Remove any dangling images
+docker image prune
+```
+
+Build the container images:
+
+```bash
+laconic-so --stack graph-node build-containers
+```
+
+## Create a deployment
+
+Initialize deployment and create "spec" file:
+
+```bash
+laconic-so --stack graph-node deploy init --output graph-node-spec.yml
+```
+
+We need to assign a fixed port `8000` for subgraph GQL endpoint and `8020` for subgraph deployment. The values can be
+customized by editing the "spec" file generated by `laconic-so deploy init`.
+```
+$ cat graph-node-spec.yml
+stack: graph-node
+ports:
+  graph-node:
+   - '8000:8000'
+   - '8001'
+   - '8020:8020'
+   - '8030'
+...
+```
+
+Create deployment:
+
+```bash
+laconic-so deploy create --spec-file graph-node-spec.yml --deployment-dir graph-node-deployment
+```
+
+## Start the stack
+
+Create an env file with the following values to be set before starting the stack:
+
+```bash
+# Set ETH RPC endpoint the graph node will use
+
+# Host and port of the ETH RPC endpoint to check before starting graph-node
+export ETH_RPC_HOST=
+export ETH_RPC_PORT=
+
+# The etherum network(s) graph-node will connect to
+# Set this to a space-separated list of the networks where each entry has the form NAME:URL
+export ETH_NETWORKS=
+```
+
+Example env file:
+
+```bash
+export ETH_RPC_HOST=filecoin.chainup.net
+export ETH_RPC_PORT=443
+
+export ETH_NETWORKS=filecoin:https://filecoin.chainup.net/rpc/v1
+```
+
+Set the environment variables:
+
+```bash
+source <PATH_TO_ENV_FILE>
+```
+
+Deploy the stack:
+
+```bash
+laconic-so deployment --dir graph-node-deployment start
+
+# Note: Remove any existing volumes in the cluster for a fresh start
+```
+
+After all services have started, follow `graph-node` logs:
+
+```bash
+laconic-so deployment --dir graph-node-deployment logs -f graph-node
+```
+
+Subgraphs can now be deployed to the graph-node.
+Follow [Deploy the Subgraph](https://github.com/graphprotocol/graph-node/blob/v0.32.0/docs/getting-started.md#24-deploy-the-subgraph) section in graph-node docs for an existing subgraph.
+
+## Set environment variables
+
+* The graph-node environment variable `ETHEREUM_REORG_THRESHOLD` can be set in the deployment compose file
+  ```bash
+  $ cat graph-node-deployment/compose/docker-compose-graph-node.yml
+  services:
+    graph-node:
+      image: cerc/graph-node:local
+      ...
+      environment:
+        ...
+        GRAPH_LOG: debug
+        ETHEREUM_REORG_THRESHOLD: 3
+  ```
+  Change `ETHEREUM_REORG_THRESHOLD` to desired value
+
+  * To restart graph-node with updated values
+    * Stop the stack first
+      ```bash
+      laconic-so deployment --dir graph-node-deployment stop
+      ```
+    * Start the stack again
+      ```
+      laconic-so deployment --dir graph-node-deployment start
+      ```
+  * To check if environment variable has been updated in graph-node container
+      ```bash
+      $ laconic-so deployment --dir graph-node-deployment exec graph-node bash
+      root@dc4d3abe1615:/# echo $ETHEREUM_REORG_THRESHOLD
+      16
+      ```
+
+## Clean up
+
+Stop all the services running in background run:
+
+```bash
+laconic-so deployment --dir graph-node-deployment stop
+```
+
+Clear volumes created by this stack:
+
+```bash
+laconic-so deployment --dir graph-node-deployment stop --delete-volumes
+```

app/data/stacks/graph-node/stack.yml

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+version: "1.0"
+name: graph-node
+description: "Stack for running graph-node"
+repos:
+  - github.com/graphprotocol/graph-node
+containers:
+  - cerc/graph-node
+pods:
+  - graph-node