Add more resource in large cluster

[wnxn]

What happened: In QingCloud CSI v1.1.0, we planed to add Guarantee class of QoS #123 and limited containers' resource request. In KS 2.1 testing, the external-controller container can't start in large cluster. After turning up resource limit and request, the external-controller could run normally.

What you expected to happen: Add more resource in resource limit and request in QingCloud CSI YAML file

How to reproduce it (as minimally and precisely as possible): Deploy QingCloud CSI v1.1.0-rc.3 in 200+ nodes Kubernetes v1.15 cluster

Anything else we need to know?:

Environment:

• Kubernetes version (use kubectl version): v1.15
• OS (e.g: cat /etc/os-release):
• Kernel (e.g. uname -a):
• QingCloud CSI plugin version: v1.1.0-rc.3
• Cloud resource (e.g. region, zone, instance id, volume id):
• Network plugin and version (if this is a network-related bug):
• Others:

[wnxn]

• In 200 nodes Kubernetes v1.15 cluster

Container	Version	CPU(m)	Memory(MiB)
provisioner	v1.4.0	1	12
attacher	v1.2.1	30	20
snapshotter	v1.2.2	1	7
resizer	v0.2.0	1	10
csi-qingcloud(controller)	v1.1.0-rc.3	1	12
node-driver-registrar	v1.2.0	1	4
csi-qingcloud(node)	v1.1.0-rc.3	1	8