Merge pull request #155 from justinsb/docs_6

More docs polishing

docs/arguments.md

@@ -13,8 +13,16 @@ Currently this can only be a single CIDR.
 
 Examples:
 
+CLI:
 `--admin-access=18.0.0.0/8` to restrict to IPs in the 18.0.0.0/8 CIDR
 
+YAML:
+
+```
+spec:
+  adminAccess:
+  - 18.0.0.0/8
+```
 
 ## dns-zone
 

docs/work_in_progress/concepts.md

@@ -0,0 +1,11 @@
+# kops Core Concepts
+
+## StateStore
+
+## Clusters
+
+## InstanceGroups
+
+## KeyStore & SecretStore
+
+Both for bootstrapping reasons, but also because we likely want security

docs/work_in_progress/pushing_updates_without_rebooting.md

@@ -0,0 +1,51 @@
+****************
+Work in progress
+****************
+
+
+Notes:
+
+* Only works if you haven't made changes to the kube_env.yaml file (which includes assets)
+
+
+## Procedure
+
+To get the external IPs of all nodes:
+
+```
+IPS=`kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="ExternalIP")].address}'`
+echo $IPS
+```
+
+Then to apply updates:
+
+```
+for ip in $IPS; do
+
+echo "Updating ${ip}"
+
+echo "Sleeping for 30 seconds first"
+sleep 30
+
+cat <<'EOF' | ssh admin@${ip} 'sudo bash -s'
+#/bin/bash
+set -e
+set -x
+NODEUP_TAR_URL=https://kubeupv2.s3.amazonaws.com/nodeup/nodeup-1.3.tar.gz
+NODEUP_TAR=nodeup-1.3.tar.gz
+
+INSTALL_DIR="/var/cache/kubernetes-install"
+mkdir -p ${INSTALL_DIR}  
+cd ${INSTALL_DIR}
+
+curl -f --ipv4 -Lo "${NODEUP_TAR}" --connect-timeout 20 --retry 6 --retry-delay 10 "${NODEUP_TAR_URL}"
+rm -rf nodeup
+tar zxf ${NODEUP_TAR}
+
+( cd nodeup/root; ./nodeup --conf=/var/cache/kubernetes-install/kube_env.yaml --v=8 )
+EOF
+
+done
+
+echo "Done!"
+```