learncodeacademy · June 17, 2021 15:43 · Oct 22, 2015 · Oct 22, 2015 · Oct 22, 2015 · Oct 22, 2015
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # Running a High Availability Service on CoreOS using Docker, Fleet, Flannel, Etcd, Confd & Nginx
 
-- View the diagram of what's going on: https://www.draw.io/#G0B74l6vUHf9HrMzNrYUlyMm40RWs
+- View the diagram of what's going on: https://drive.google.com/file/d/0B74l6vUHf9HrMzNrYUlyMm40RWs/view?usp=sharing
 
 ## Tools used:
   - coreos: server machine clustering via a shared cloud-config.yml

diff --git a/README.md b/README.md
@@ -1,6 +1,7 @@
 # Running a High Availability Service on CoreOS using Docker, Fleet, Flannel, Etcd, Confd & Nginx
+
 - View the diagram of what's going on: https://www.draw.io/#G0B74l6vUHf9HrMzNrYUlyMm40RWs
-- 
+
 ## Tools used:
   - coreos: server machine clustering via a shared cloud-config.yml
   - etcd: key value store for service registration and discovery

diff --git a/README.md b/README.md
@@ -1,2 +1,9 @@
 # Running a High Availability Service on CoreOS using Docker, Fleet, Flannel, Etcd, Confd & Nginx
-- View the diagram of what's going on: https://www.draw.io/#G0B74l6vUHf9HrMzNrYUlyMm40RWs
+- View the diagram of what's going on: https://www.draw.io/#G0B74l6vUHf9HrMzNrYUlyMm40RWs
+- 
+## Tools used:
+  - coreos: server machine clustering via a shared cloud-config.yml
+  - etcd: key value store for service registration and discovery
+  - fleet: scheduling/failover of docker containers across coreos cluster
+  - flannel: Gives each docker container a unique ip that allows you to access the internal port (i.e. port 80 not 32679)
+  - confd: watch etcd for nodes arriving/leaving - template nginx configuration files / reload nginx on change
diff --git a/README.md b/README.md
@@ -0,0 +1,2 @@
+# Running a High Availability Service on CoreOS using Docker, Fleet, Flannel, Etcd, Confd & Nginx
+- View the diagram of what's going on: https://www.draw.io/#G0B74l6vUHf9HrMzNrYUlyMm40RWs
diff --git a/[email protected] b/[email protected]
@@ -7,5 +7,5 @@ TimeoutStartSec=0
 ExecStartPre=-/usr/bin/docker kill someapp%i
 ExecStartPre=-/usr/bin/docker rm someapp%i
 ExecStartPre=/usr/bin/docker pull willrstern/node-sample
-ExecStart=/usr/bin/sh -c "/usr/bin/docker run -e APPNAME=someapp%i --name someapp%i -P willrstern/node-sample"
+ExecStart=/usr/bin/docker run -e APPNAME=someapp%i --name someapp%i -P willrstern/node-sample
 ExecStop=/usr/bin/docker stop someapp%i
diff --git a/cloud-config.yml b/cloud-config.yml
@@ -0,0 +1,26 @@
+#cloud-config
+
+coreos:
+  etcd2:
+    # generate a new token for each unique cluster from https://discovery.etcd.io/new?size=3
+    # specify the initial size of your cluster with ?size=X
+    discovery: https://discovery.etcd.io/36dbe83ce50fbac719f1f5acd5dd41e9
+    # multi-region and multi-cloud deployments need to use $public_ipv4
+    advertise-client-urls: http://$private_ipv4:2379,http://$private_ipv4:4001
+    initial-advertise-peer-urls: http://$private_ipv4:2380
+    # listen on both the official ports and the legacy ports
+    # legacy ports can be omitted if your application doesn't depend on them
+    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
+    listen-peer-urls: http://$private_ipv4:2380
+  units:
+    - name: etcd2.service
+      command: start
+    - name: fleet.service
+      command: start
+    - name: flanneld.service
+      drop-ins:
+        - name: 50-network-config.conf
+          content: |
+            [Service]
+            ExecStartPre=/usr/bin/etcdctl set /coreos.com/network/config '{ "Network": "10.1.0.0/16" }'
+      command: start
diff --git a/[email protected] b/[email protected]
@@ -0,0 +1,11 @@
+[Unit]
+Description=Announce Someapp%i
+BindsTo=someapp@%i.service
+After=someapp@%i.service
+
+[Service]
+ExecStart=/bin/sh -c "while true; do etcdctl set /services/someapp/upstream/someapp%i \"$(sleep 5 && docker inspect -f '{{.NetworkSettings.IPAddress}}' someapp%i):3000\" --ttl 60;sleep 45;done"
+ExecStop=/usr/bin/etcdctl rm /services/someapp/upstream/someapp%i
+
+[X-Fleet]
+MachineOf=someapp@%i.service
diff --git a/someapp-lb.service b/someapp-lb.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=someapp-lb
+After=docker.service
+
+[Service]
+TimeoutStartSec=0
+ExecStartPre=-/usr/bin/docker kill someapp-lb
+ExecStartPre=-/usr/bin/docker rm someapp-lb
+ExecStartPre=/usr/bin/docker pull willrstern/nginx-lb
+ExecStart=/usr/bin/sh -c "/usr/bin/docker run -e SERVICE_NAME=someapp -e ETCD=\"$(ifconfig docker0 | awk '/\<inet\>/ { print $2}'):2379\" -P --name someapp-lb willrstern/nginx-lb"
+ExecStartPost=/usr/bin/sh -c "sleep 3 && curl -X PUT 159.203.110.244:2379/v2/keys/subdomains/someapp -d value=$(/usr/bin/ip route|grep 'eth0.\+src' | head -1 | grep -o '[0-9\.]\+\s\+$' | grep -o '[0-9\.]\+'):$(/usr/bin/docker ps | grep 'someapp-lb' | grep -o '[0-9]\+->' | grep -o '[0-9]\+')"
+ExecStop=/usr/bin/docker stop someapp-lb
diff --git a/[email protected] b/[email protected]
@@ -0,0 +1,11 @@
+[Unit]
+Description=someapp%i
+After=docker.service
+
+[Service]
+TimeoutStartSec=0
+ExecStartPre=-/usr/bin/docker kill someapp%i
+ExecStartPre=-/usr/bin/docker rm someapp%i
+ExecStartPre=/usr/bin/docker pull willrstern/node-sample
+ExecStart=/usr/bin/sh -c "/usr/bin/docker run -e APPNAME=someapp%i --name someapp%i -P willrstern/node-sample"
+ExecStop=/usr/bin/docker stop someapp%i
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		# Running a High Availability Service on CoreOS using Docker, Fleet, Flannel, Etcd, Confd & Nginx
		- View the diagram of what's going on: https://www.draw.io/#G0B74l6vUHf9HrMzNrYUlyMm40RWs