Add a v2 docker-compose.yml for etcd cluster

Author: alaypatel07

README.md

@@ -1,2 +1,11 @@
 # etcd-dev-tools
 This repository has tools to make etcd development and debugging easy.
+
+### Spin a etcd v2 cluster
+
+1. Install docker-compose and clone the repo.
+2. `cd etcd-dev-tools/etcd-v2`
+3. Bring up the cluster by `docker-compose up -d`
+4. Access the cluster:
+    1. Get client shell: `docker exec -it etcd-v2_etcd-client_1 sh`
+    2. Run etcdctl commands in the container: `etcdctl member list`

etcd-v2/docker-compose.yml

@@ -0,0 +1,98 @@
+version: '2'
+services:
+
+    etcd-1:
+        image: gcr.io/etcd-development/etcd:v3.3.12
+        restart: always
+        ports:
+            - 2379
+            - 2380
+        volumes:
+          #This will makes sure that etcd-1 data directories are on the host for debugging
+          - ./data1/:/var/lib/etcd/
+          - ./certs/:/etc/ssl/certs/
+        networks:
+          etcd_dev:
+            ipv4_address: 172.30.66.10
+        environment:
+            ETCD_NAME: etcd-1
+            ETCDCTL_API: 3
+            ETCD_DEBUG: 1
+            ETCD_DATA_DIR: /var/lib/etcd
+            ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd-1:2380
+            ETCD_INITIAL_CLUSTER: etcd-1=http://etcd-1:2380,etcd-2=http://etcd-2:2380,etcd-3=http://etcd-3:2380
+            ETCD_INITIAL_CLUSTER_STATE: new
+            ETCD_INITIAL_CLUSTER_TOKEN: etcd-ftw
+            ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
+            ETCD_LISTEN_PEER_URLS: http://0.0.0.0:2380
+            ETCD_ADVERTISE_CLIENT_URLS: http://etcd-1:2379,http://127.0.0.1:2379
+    etcd-2:
+        image: gcr.io/etcd-development/etcd:v3.3.12
+        restart: always
+        ports:
+            - 2379
+            - 2380
+        volumes:
+          - ./certs/:/etc/ssl/certs/
+        networks:
+          etcd_dev:
+            ipv4_address: 172.30.66.11
+        environment:
+            ETCD_NAME: etcd-2
+            ETCDCTL_API: 3
+            ETCD_DEBUG: 1
+            ETCD_DATA_DIR: /var/lib/etcd
+            ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd-2:2380
+            ETCD_INITIAL_CLUSTER: etcd-1=http://etcd-1:2380,etcd-2=http://etcd-2:2380,etcd-3=http://etcd-3:2380
+            ETCD_INITIAL_CLUSTER_STATE: new
+            ETCD_INITIAL_CLUSTER_TOKEN: etcd-ftw
+            ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
+            ETCD_LISTEN_PEER_URLS: http://0.0.0.0:2380
+            ETCD_ADVERTISE_CLIENT_URLS: http://etcd-2:2379,http://127.0.0.1:2379
+    etcd-3:
+        image: gcr.io/etcd-development/etcd:v3.3.12
+        restart: always
+        ports:
+            - 2379
+            - 2380
+        volumes:
+          - ./certs/:/etc/ssl/certs/
+        networks:
+          etcd_dev:
+            ipv4_address: 172.30.66.12
+        environment:
+            ETCD_NAME: etcd-3
+            ETCDCTL_API: 3
+            ETCD_DEBUG: 1
+            ETCD_DATA_DIR: /var/lib/etcd
+            ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd-3:2380
+            ETCD_INITIAL_CLUSTER: etcd-1=http://etcd-1:2380,etcd-2=http://etcd-2:2380,etcd-3=http://etcd-3:2380
+            ETCD_INITIAL_CLUSTER_STATE: existing
+            ETCD_INITIAL_CLUSTER_TOKEN: etcd-ftw
+            ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
+            ETCD_LISTEN_PEER_URLS: http://0.0.0.0:2380
+            ETCD_ADVERTISE_CLIENT_URLS: http://etcd-3:2379,http://127.0.0.1:2379
+
+    etcd-client:
+        image: gcr.io/etcd-development/etcd:v3.3.12
+        restart: always
+        volumes:
+          - ./certs/:/etc/ssh/certs/
+        networks:
+          etcd_dev:
+            ipv4_address: 172.30.66.13
+        environment:
+          ETCDCTL_API: 2
+          ETCDCTL_ENDPOINTS: http://etcd-1:2379,http://etcd-2:2379,http://etcd-3:2379
+
+networks:
+  etcd_dev:
+    driver: bridge
+    driver_opts:
+      com.docker.network.enable_ipv6: "false"
+    ipam:
+      driver: default
+      config:
+      - subnet: 172.30.66.0/24
+        gateway: 172.30.66.1
+