dmidecode | awk ' BEGIN { printf "{" first_entry = 0 is_array = 0 array_first_entry = 0 } { if ($0 ~ /^Handle/) { if (is_array) { printf "]" is_array = 0 } if (first_entry) { printf "}," } first_entry = 1 gsub(/,$/, "", $2); printf "\"%s\": {", $2 getline line printf "\"_description\": \"%s\"", line gsub(/,$/, "", $5); printf ",\"_type\": \"%s\"", $5 gsub(/,$/, "", $6); printf ",\"_bytes\": \"%s\"", $6 } else if ($0 ~ /:/) { if (is_array) { printf "]" is_array = 0 } gsub(/^[[:space:]]+/, "", $0) split($0, a, ": "); if (length(a) > 1) { gsub(/"/, "\\\"", a[2]) gsub(/[[:space:]]+$/, "", a[2]) printf ",\"%s\": \"%s\"", a[1], a[2] } else if (length(a) == 1) { gsub(/:$/, "", a[1]) printf ",\"%s\": [", a[1] is_array = 1 array_first_entry = 0 } } else if (is_array && NF > 0) { if (array_first_entry) { printf "," } array_first_entry = 1 gsub(/^[[:space:]]+/, "", $0) gsub(/"/, "\\\"", $0) printf "\"%s\"", $0 } } END { if (is_array) { printf "]" } print "}}" }'
Tag Archives: debian
recover drbd split brain
Define one node as secondary and discard data on this
drbdadm secondary all drbdadm disconnect all drbdadm -- --discard-my-data connect all
Define anoher node as primary and connect
drbdadm primary all drbdadm disconnect all drbdadm connect all
Test Jumbo Frames / MTU 9000
Linux:
ping -M do -s 8972 xxx.xxx.xxx.xxx
OSX/BSD:
ping -D -s 8184 xxx.xxx.xxx.xxx
Windows:
ping -f -l 9000 xxx.xxx.xxx.xxx
Example results on Linux
If you’ve forgotten to enable jumbo frames/9k MTU on your client device you’re sending the ping from:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes ping: sendto: Message too long
If you have enabled jumbo frames on your client but not the destination (or a switch in between):
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes Request timeout for icmp_seq 0
If you’ve done everything righ:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes 8192 bytes from xxx.xxx.xxx.xxx: icmp_seq=0 ttl=128 time=0.714 ms
bash DNSDIST dashboard
Static network config with dhcp fallback
/etc/network/interfaces
:
auto wan iface wan inet manual up ifup eth0=eth0-static post-up /etc/network/checkConnectivity.sh eth0 192.168.0.1 10.10.0.2 iface eth0 inet manual #static eth0 config iface eth0-static inet static address 192.168.0.97 netmask 255.255.255.0 gateway 192.168.0.1 dns-nameservers 192.168.0.1 10.10.0.2 dns-search example.net #dhcp eth0 config iface eth0-dhcp inet dhcp
/etc/network/checkConnectivity.sh
:
#!/bin/bash nif=${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-static
ifup eth0=eth0-dhcp