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Add ufw firewall #226

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Add ufw firewall #226

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573a284
Merge pull request #1 from xetys/master
gadelkareem Nov 16, 2018
de857db
Add ufw
gadelkareem Nov 16, 2018
7ae5dec
fix comments
gadelkareem Nov 16, 2018
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2 changes: 1 addition & 1 deletion pkg/clustermanager/cluster.go
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Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,7 @@ func (manager *Manager) ProvisionNodes(nodes []Node) error {
go func(node Node) {
manager.eventService.AddEvent(node.Name, "install packages")
//_, err := manager.nodeCommunicator.RunCmd(node, "wget -cO- https://raw.githubusercontent.com/xetys/hetzner-kube/master/install-docker-kubeadm.sh | bash -")
provisioner := NewNodeProvisioner(node, manager.nodeCommunicator, manager.eventService)
provisioner := NewNodeProvisioner(node, manager.nodeCommunicator, manager.eventService, manager.clusterProvider.GetNodeCidr())
err := provisioner.Provision(node, manager.nodeCommunicator, manager.eventService)
if err != nil {
errChan <- err
Expand Down
31 changes: 29 additions & 2 deletions pkg/clustermanager/provision_node.go
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Expand Up @@ -18,14 +18,16 @@ type NodeProvisioner struct {
node Node
communicator NodeCommunicator
eventService EventService
nodeCidr string
}

// NewNodeProvisioner creates a NodeProvisioner instance
func NewNodeProvisioner(node Node, communicator NodeCommunicator, eventService EventService) *NodeProvisioner {
func NewNodeProvisioner(node Node, communicator NodeCommunicator, eventService EventService, nodeCidr string) *NodeProvisioner {
return &NodeProvisioner{
node: node,
communicator: communicator,
eventService: eventService,
nodeCidr: nodeCidr,
}
}

Expand Down Expand Up @@ -80,6 +82,10 @@ func (provisioner *NodeProvisioner) prepareAndInstall() error {
if err != nil {
return err
}
err = provisioner.configurePackages()
if err != nil {
return err
}

return nil
}
Expand Down Expand Up @@ -168,7 +174,7 @@ func (provisioner *NodeProvisioner) updateAndInstall() error {
}

provisioner.eventService.AddEvent(provisioner.node.Name, "installing packages")
command := fmt.Sprintf("apt-get install -y docker-ce kubelet=%s kubeadm=%s kubectl=%s wireguard linux-headers-$(uname -r) linux-headers-virtual",
command := fmt.Sprintf("apt-get install -y docker-ce kubelet=%s kubeadm=%s kubectl=%s wireguard linux-headers-$(uname -r) linux-headers-virtual ufw",
*K8sVersion, *K8sVersion, *K8sVersion)
_, err = provisioner.communicator.RunCmd(provisioner.node, command)
if err != nil {
Expand All @@ -177,3 +183,24 @@ func (provisioner *NodeProvisioner) updateAndInstall() error {

return nil
}

func (provisioner *NodeProvisioner) configurePackages() error {
provisioner.eventService.AddEvent(provisioner.node.Name, "configuring ufw")

_, err := provisioner.communicator.RunCmd(
provisioner.node,
"ufw --force reset"+
" && ufw allow ssh"+
" && ufw allow in from "+provisioner.nodeCidr+" to any"+ // Kubernetes VPN overlay interface
" && ufw allow in from 10.244.0.0/16 to any"+ // Kubernetes pod overlay interface
" && ufw allow 6443"+ // Kubernetes API secure remote port
" && ufw allow 80"+
" && ufw allow 443"+
" && ufw default deny incoming"+
" && ufw --force enable")
if err != nil {
return err
}

return nil
}