Dump the state of the servers found in the running configuration. A backend
name or identifier may be provided to limit the output to this backend only.
The dump has the following format:
- first line contains the format version (1 in this specification);
- second line contains the column headers, prefixed by a sharp ('#');
- third line and next ones contain data;
- each line starting by a sharp ('#') is considered as a comment.
Since multiple versions of the output may co-exist, below is the list of
fields and their order per file format version :
1:
be_id: Backend unique id.
be_name: Backend label.
srv_id: Server unique id (in the backend).
srv_name: Server label.
srv_addr: Server IP address.
srv_op_state: Server operational state (UP/DOWN/...).
0 = SRV_ST_STOPPED
The server is down.
1 = SRV_ST_STARTING
The server is warming up (up but
throttled).
2 = SRV_ST_RUNNING
The server is fully up.
3 = SRV_ST_STOPPING
The server is up but soft-stopping
(eg: 404).
srv_admin_state: Server administrative state (MAINT/DRAIN/...).
The state is actually a mask of values :
0x01 = SRV_ADMF_FMAINT
The server was explicitly forced into
maintenance.
0x02 = SRV_ADMF_IMAINT
The server has inherited the maintenance
status from a tracked server.
0x04 = SRV_ADMF_CMAINT
The server is in maintenance because of
the configuration.
0x08 = SRV_ADMF_FDRAIN
The server was explicitly forced into
drain state.
0x10 = SRV_ADMF_IDRAIN
The server has inherited the drain status
from a tracked server.
0x20 = SRV_ADMF_RMAINT
The server is in maintenance because of an
IP address resolution failure.
0x40 = SRV_ADMF_HMAINT
The server FQDN was set from stats socket.
srv_uweight: User visible server's weight.
srv_iweight: Server's initial weight.
srv_time_since_last_change: Time since last operational change.
srv_check_status: Last health check status.
srv_check_result: Last check result (FAILED/PASSED/...).
0 = CHK_RES_UNKNOWN
Initialized to this by default.
1 = CHK_RES_NEUTRAL
Valid check but no status information.
2 = CHK_RES_FAILED
Check failed.
3 = CHK_RES_PASSED
Check succeeded and server is fully up
again.
4 = CHK_RES_CONDPASS
Check reports the server doesn't want new
sessions.
srv_check_health: Checks rise / fall current counter.
srv_check_state: State of the check (ENABLED/PAUSED/...).
The state is actually a mask of values :
0x01 = CHK_ST_INPROGRESS
A check is currently running.
0x02 = CHK_ST_CONFIGURED
This check is configured and may be
enabled.
0x04 = CHK_ST_ENABLED
This check is currently administratively
enabled.
0x08 = CHK_ST_PAUSED
Checks are paused because of maintenance
(health only).
srv_agent_state: State of the agent check (ENABLED/PAUSED/...).
This state uses the same mask values as
"srv_check_state", adding this specific one :
0x10 = CHK_ST_AGENT
Check is an agent check (otherwise it's a
health check).
bk_f_forced_id: Flag to know if the backend ID is forced by
configuration.
srv_f_forced_id: Flag to know if the server's ID is forced by
configuration.
srv_fqdn: Server FQDN.
srv_port: Server port.
srvrecord: DNS SRV record associated to this SRV.
Tag: output
Expect script suppress output
You might write your program like this:
#!/bin/sh
output=$(expect -c '
# suppress the display of the process interaction
log_user 0
spawn telnet '"$HOST $PORT"'
sleep 1
send "\r"
send "\r"
# after a prompt, send the interesting command
expect Prompt> { send "dir\r" }
# eat the \n the remote end sent after we sent our \r
expect "\n"
# wait for the next prompt, saving its position in expect_out(buffer)
expect -indices Prompt>
# output what came after the command and before the next prompt
# (i.e. the output of the "dir" command)
puts [string range $expect_out(buffer) \
0 [expr $expect_out(0,start) - 1]]
')
echo "======="
echo "$output"
echo "======="How to grep the output of cURL?
curl writes the output to stderr, so redirect that and also suppress the progress:
curl -v --silent https://google.com/ 2>&1 | grep expireThe reason why curl writes the information to stderr is so you can do:
curl <url> | someprgram without that information clobbering the input of someprogram
It is possible to use --stderr - as parameter, to redirect the output from stderr (default) to stdout. With this option you also should use --silent to suppress the progress bar.
$ curl -v --silent https://google.com/ --stderr - | grep expire
* expire date: 2015-09-01 00:00:00 GMT
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