chenchun

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-vlan_on_bond_and_bridge_using_ip_commands

To use VLANs over bonds and bridges, proceed as follows:

1. Add a bond device as root:

ip link add bond0 type bond
ip link set bond0 type bond miimon 100 mode active-backup
ip link set em1 down

chenchun

http://vladimir-ivanov.net/how-to-compact-virtualboxs-vdmk-file-size/

1. Fill the free space with zeros VirtualBox only knows that the space is really free if it’s been set to zero, and standard deletion won’t do this. Login into the virtual machine and run the following command:

cat /dev/zero > zero.fill; sync; sleep 1; sync; rm -f zero.fill

2. compact vmdk

chenchun

cmake_minimum_required(VERSION 3.8)
project(linux C)

include_directories(include)

file(GLOB_RECURSE ALL_FILES
        "*.h"
        "*.c"
        )

chenchun

/msg nickserv register [password] [email]
/msg nickserv identify [password]

chenchun

# set up on host1 192.168.33.11, 08:00:27:f8:73:79
ip link add vxlan0 type vxlan id 42 group 239.1.1.1 dev eth1 dstport 4789
ip link set vxlan0 address 54:8:20:0:0:1
ip address add 10.0.0.1/8 dev vxlan0
ip link set up vxlan0

# set up on host2 192.168.33.12, 08:00:27:d9:18:aa
ip link add vxlan0 type vxlan id 42 group 239.1.1.1 dev eth1 dstport 4789
ip link set vxlan0 address 54:8:20:0:0:2
ip address add 10.0.0.2/8 dev vxlan0

chenchun

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chenchun

CAAS platform APP resource monitoring

APP resource monitoring

• Data should be kept as long as Long time apps running
• Data should be kept months after apps die
• Support querying data per container
• Support querying data per app
• Support querying data per cluster
• Tens of thousands of collectors
• Load balancing multiple query engines

chenchun

rest api
http://localhost:4242/api/query?start=1466564936&m=avg:20s-max:rate:cpu_usage_total{queue=gaia_queue,user=11,appName=rami_test,instance=3}
curl 'http://localhost:4242/api/query?start=1466564936&m=avg:20s-max:rate:cpu_usage_total\{queue=root.demo,user=null,appName=rami,instanceId=1\}'

put sys.cpu.user 1356998400 1 h=w1 c=0
put sys.cpu.user 1356998401 3 h=w1 c=1
put sys.cpu.user 1356998400 5 h=w2 c=0

chenchun

go version < 1.5

cd /usr/local/go/src
GOOS=linux GOARCH=amd64 CGO_ENABLED=0 ./make.bash --no-clean

all go version, compile your app

GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -v .
env GOOS=linux GOARCH=amd64 go build -v . 

chenchun

kubelet

Component

Ordered by the goroutine start time

• eventBroadcaster
• Watching apiserver
• garbageCollection(containerGC/imageManager)
• imageManager