Define one node as secondary and discard data on this
drbdadm secondary all drbdadm disconnect all drbdadm -- --discard-my-data connect all
Define anoher node as primary and connect
drbdadm primary all drbdadm disconnect all drbdadm connect all
Tag Archives: debian
Test Jumbo Frames / MTU 9000
Linux:
ping -M do -s 8972 xxx.xxx.xxx.xxx
OSX/BSD:
ping -D -s 8184 xxx.xxx.xxx.xxx
Windows:
ping -f -l 9000 xxx.xxx.xxx.xxx
Example results on Linux
If you’ve forgotten to enable jumbo frames/9k MTU on your client device you’re sending the ping from:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes ping: sendto: Message too long
If you have enabled jumbo frames on your client but not the destination (or a switch in between):
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes Request timeout for icmp_seq 0
If you’ve done everything righ:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes 8192 bytes from xxx.xxx.xxx.xxx: icmp_seq=0 ttl=128 time=0.714 ms
bash DNSDIST dashboard
Static network config with dhcp fallback
/etc/network/interfaces:
auto wan iface wan inet manual up ifup eth0=eth0-static post-up /etc/network/checkConnectivity.sh eth0 192.168.0.1 10.10.0.2 iface eth0 inet manual #static eth0 config iface eth0-static inet static address 192.168.0.97 netmask 255.255.255.0 gateway 192.168.0.1 dns-nameservers 192.168.0.1 10.10.0.2 dns-search example.net #dhcp eth0 config iface eth0-dhcp inet dhcp
/etc/network/checkConnectivity.sh:
#!/bin/bash
nif=${1}
shift
sleep 1
for i in ${@}; do
ping -c 2 ${i} \
&& exit 0
done
# if nothing responds
ifdown ${nif}
ifup ${nif}=${nif}-dhcp
manually override:
ifup eth0=eth0-staticifup eth0=eth0-dhcp
WebDAV with cURL
Assuming the following Data:
- Webdav URL: http://example.com/webdav
- Username: user
- Password: pass
Actions
Reading Files/Folders
curl 'http://example.com/webdav'
Creating new Folder
curl -X MKCOL 'http://example.com/webdav/new_folder'
Uploading File
curl -T '/path/to/local/file.txt' 'http://example.com/webdav/test/new_name.txt'
Renaming File
curl -X MOVE --header 'Destination:http://example.org/webdav/new.txt' 'http://example.com/webdav/old.txt'
Deleting Files/Folders
File:
curl -X DELETE 'http://example.com/webdav/test.txt'
Folder:
curl -X DELETE 'http://example.com/webdav/test'
List Files in a Folder
curl -i -X PROPFIND http://example.com/webdav/ --upload-file - -H "Depth: 1" <<end <?xml version="1.0"?> <a:propfind xmlns:a="DAV:"> <a:prop><a:resourcetype/></a:prop> </a:propfind> end