Zasazeno 100 hlav Solarisu od p. Krause z Mělníka. Díry jsem vyvrtal motorovým vrtákem průměru 200mm, dospod jsme dávali kompost z Mimoně.
Ambari – user can log in but has no privileges
We ran into some interesting issue – user has all the privileges, was in correct ldap group, can log in to the ambari, but privileges weren’t effective.
I did multiple discoveries – checked log ambari-server.log and found out following
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com.google.common.cache.CacheLoader$InvalidCacheLoadException: CacheLoader returned null for key myuser. |
So, tried to restart ambari-server, didn’t work. Did further investigation, using ambari API
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$ curl -XGET -H"X-Requested-By: ambari" -u admin:... https://ambari.mycluster.com/api/v1/users/myuser { "href" : "http://ambari.mycluster.com/api/v1/users/myuser", "Users" : { "active" : true, "admin" : false, "groups" : [ "ldap-users", "cluster-admins" ], "ldap_user" : false, "user_name" : "MYUSER", "user_type" : "PAM" }, |
so, this worked. Notice uppercase in user_name. So I tried to fetch user info with privileges
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$ curl -XGET -H"X-Requested-By: ambari" -u admin:... https://ambari.mycluster.com/api/v1/users/myuser?fields=privileges/* { "href" : "http://ambari.mycluster.com/api/v1/users/myuser?fields=privileges/*", "Users" : { "user_name" : "MYUSER" }, "privileges" : [ { "href" : "http://ambari.mycluster.com/api/v1/users/myuser/privileges/153", "PrivilegeInfo" : { "instance_name" : "INSTANCE", "permission_label" : "View User", "permission_name" : "VIEW.USER", "principal_name" : "cluster-admins", "principal_type" : "GROUP", "privilege_id" : 153, "type" : "VIEW", "user_name" : "MYUSER", "version" : "2.4.3.0", "view_name" : "ADMIN_VIEW" } }, |
Nice. Works too. So another check – load only certain privileges – 153.
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$ curl -XGET -H"X-Requested-By: ambari" -u admin:... https://ambari.mycluster.com/api/v1/users/myuser/privileges/153 { "status": 500, "message": "Server Error" } and even upcase $ curl -XGET -H"X-Requested-By: ambari" -u admin:... https://ambari.mycluster.com/api/v1/users/MYUSER/privileges/153 { "status": 500, "message": "Server Error" } |
Aha! Looks like there’s some inconsitency in the postgres database. So, check it!
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ambari=> select * from users where user_name='myuser'; user_id | principal_id | ldap_user | user_name | create_time | user_password | active | active_widget_layouts | user_type ---------+--------------+-----------+-----------+-------------+---------------+--------+-----------------------+----------- (0 rows) ambari=> select * from users where user_name='MYUSER'; user_id | principal_id | ldap_user | user_name | create_time | user_password | active | active_widget_layouts | user_type ---------+--------------+-----------+-----------+------------------------+---------------+--------+-----------------------+----------- 16005 | 20005 | 0 | MYUSER | 2019-11-22 04:37:44.18 | | 1 | [{"id":"29405"}] | PAM (1 row) |
Gotcha. There’s no such user named myuser in the database – and pg is case sensitive. So, rename the user
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ambari=> update users set user_name='myuser' where user_id=16005; UPDATE 1 ambari=> \q |
and restart ambari-server. Now we can try again the api call
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$ curl -XGET -H"X-Requested-By: ambari" -u admin:... https://ambari.mycluster.com/api/v1/users/myuser/privileges/153 { "href" : "http://ambari.mycluster.com/api/v1/users/myuser/privileges/153", "PrivilegeInfo" : { "instance_name" : "INSTANCE", "permission_label" : "View User", "permission_name" : "VIEW.USER", "principal_name" : "cluster-admins", "principal_type" : "GROUP", "privilege_id" : 153, "type" : "VIEW", "user_name" : "myuser", "version" : "2.4.3.0", "view_name" : "ADMIN_VIEW" } } |
Voila!
Foxtrot: Programy pro ČOV
Program pro řídící jednotku Foxtrot a čistírnu odpadních vod Aquatec AT-6. Nabízí 10 programů, dle zatížení domácnosti. Dá se později napojit na vodoměr (počitadlo) a podle toho měnit program.
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TYPE T_COVProgram :STRUCT runs: ARRAY[0..23] OF usint; END_STRUCT END_TYPE VAR_GLOBAL COV_Programs: ARRAY[1..10] OF T_COVProgram := [ // cas - hodina rozdelena na 12 useku po 5min. // hodnoty: 1 -> 1 min bezi, 5-1=4 stoji // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 // 1 - 5.6h celkem, 4 min stoji, 1 min bezi (runs := [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]), // 2 - 8.8h celkem, 4 min stoji, 1 min bezi (runs := [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5]), // 3 - 10.4h celkem, 4 min stoji, 1 min bezi (runs := [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1]), // 4 - 12h celkem, 4 min stoji, 1 min bezi (runs := [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 5, 1, 1, 1, 1, 1, 5, 5]), // 5 - 15h celkem, 3 min stoji, 2 min bezi (runs := [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 5, 2, 2, 2, 2, 2, 5, 2, 2, 2, 2, 2, 5, 5]), // 6 - 18h celkem, 2 min stoji, 3 min bezi (runs := [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 5, 3, 3, 3, 3, 3, 5, 5]), // 7 - 20.4h celkem, 2 min stoji, 3 min bezi (runs := [5, 5, 5, 5, 5, 5, 3, 3, 3, 5, 5, 5, 3, 3, 3, 5, 5, 5, 3, 3, 3, 5, 5, 5]), // 8 - 21.6h celkem, 2 min stoji, 3 min bezi (runs := [5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5]), // 9 - 22.8h celkem, 2 min stoji, 3 min bezi (runs := [5, 5, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5, 5, 3, 5, 5, 5, 5]), // 10 - 24h celkem, 24h bezi (runs := [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5]) ]; END_VAR VAR_GLOBAL RETAIN COV_PROGRAM : usint := 0; END_VAR |
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FUNCTION_BLOCK fbCistickaProgram VAR_INPUT prog_num: usint; END_VAR VAR_OUTPUT output: BOOL; END_VAR VAR_IN_OUT END_VAR VAR ton_stop: ton; ton_run: ton; light: fb_iLight; curr_time: time; hour: usint; covprg : T_COVProgram; mins : usint; END_VAR curr_time := GetTime(); hour := hour_of_time(in := curr_time); covprg := COV_Programs[prog_num]; mins := covprg.runs[hour]; ton_stop( IN := not ton_run.q, pt := encodeTime(M := 5-mins)); ton_run( IN := ton_stop.q, pt := encodeTime(M:= mins)); light( lightOn := ton_stop.q, lightOff := ton_run.q, name:= 'Cisticka', out => output ); END_FUNCTION_BLOCK |
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PROGRAM prgJson VAR cisticka : fbCistickaProgram; END_VAR if COV_PROGRAM = 0 then COV_PROGRAM := 1; end_if; cisticka( prog_num := COV_PROGRAM, output => RO04_COV ); END_PROGRAM |
Jsou tam ještě nějaké záseky, např. že pokud je cyklus plný (5 minut) a následuje ten samý (bez pauzy), bylo by fajn vynechat úplně vypínání výstupu, popř. zkrátit cyklus o párset ms. Dále pak přidat reset v případě změny programu atd. Každopádně to ale zatím funguje k mé spokojenosti.
Protected: Gradující demence vedoucích prací na UZS TUL v Liberci, díl první
R – Četnost podruhé
Mějme následující data:
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> head(dotaznik.csv[,c(2,3)]) type gender 1 H F 2 H M 3 A F 4 A M 5 A F 6 H M |
A potřebujeme zjistit absolutní a relativní četnost výskytu žen a mužů, rozdělenou ještě podle hodnoty v type .
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> tbl <- table(dotaznik.csv$gender, dotaznik.csv$type) > tbl A H M 18 16 Ž 17 19 |
Opět převedeme na data frame
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> tbl.frame <- as.data.frame(tbl) > tbl.frame Var1 Var2 Freq 1 M A 18 2 Ž A 17 3 M H 16 4 Ž H 19 |
A máme absolutní četnost. Teď vypočítáme relativní četnost.
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> library(plyr) > ddply(tbl.frame, .(Var2), transform, prop=Freq/sum(Freq)) Var1 Var2 Freq prop 1 M A 18 0.5142857 2 Ž A 17 0.4857143 3 M H 16 0.4571429 4 Ž H 19 0.5428571 |
Což znamená: pro každý subset z framu tbl.frame , rozdělený podle proměnné Var2 , proveď transform , a vypočti relativní četnost podle frekvence (abs. četnosti) a součtu hodnot frekvence.
R – četnost a graf
Dostal jsem pověření z nejvyšších míst vyrobit statistické zhodnocení dotazníků. A protože bytostně nemám rád Excel, našel jsem R a zkouším.
Udělal jsem data do CSV souboru a nahrál do R (RStudio)
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> head(dotaznik.csv) num type gender age height weight edu 1 1 H M 60 182 100 Vysokoškolské 2 2 H M 49 188 102 Vyučen/a 3 3 H M 61 176 75 Vyučen/a 4 4 H M 56 180 110 Střední 5 5 H M 47 180 95 Vysokoškolské 6 6 H M 48 178 95 Střední |
Zkusíme vyrobit četnost vzdělání (edu) a potom ji ještě rozdělit podle pohlaví (gender).
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> edu <- table(dotaznik.csv$edu) > edu Střední Vysokoškolské Vyšší odborné Vyučen/a 30 7 2 25 Základní 6 |
Máme tabulku, ale potřebujeme z ní frame
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> fedu <- as.data.frame(edu) > fedu Var1 Freq 1 Střední 30 2 Vysokoškolské 7 3 Vyšší odborné 2 4 Vyučen/a 25 5 Základní 6 |
Přidáme relativní četnost (mean)
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> fedu$mean <- fedu$Freq / sum(fedu$Freq) > fedu Var1 Freq mean 1 Střední 30 0.42857143 2 Vysokoškolské 7 0.10000000 3 Vyšší odborné 2 0.02857143 4 Vyučen/a 25 0.35714286 5 Základní 6 0.08571429 |
A teď na graf. Používáme ggplot2.
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ggplot(fedu, aes(x=Var1, y=Freq)) + geom_bar(stat='identity') |
Fajn. Ale chceme graf otočit
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ggplot(fedu, aes(x=Var1, y=Freq)) + geom_bar(stat='identity') + coord_flip() |
Teď ještě smazat popisek osy x a přepsat osu y.
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ggplot(fedu, aes(x=Var1, y=Freq)) + geom_bar(stat='identity') + coord_flip() + xlab('Vzdělání') + theme(axis.title.x = element_blank()) + ggtitle('Dosažené vzdělání') |
A finálně přidáme hodnoty frekvence do jednotlivých sloupců.
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ggplot(fedu, aes(x=Var1, y=Freq)) + geom_bar(stat='identity', position=position_dodge()) + geom_text(aes(label=Freq), hjust=1.3, color="white",position = position_dodge(0.9), size=3.5) + coord_flip() + xlab('Vzdělání') + theme(axis.title.x = element_blank()) + ggtitle('Dosažené vzdělání') |
A teď trochu komplexněji. Ještě to rozdělíme na muže a ženy..
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> edu <- table(dotaznik.csv$gender, dotaznik.csv$edu) > edu Střední Vysokoškolské Vyšší odborné Vyučen/a Základní M 10 4 2 17 1 Ž 20 3 0 8 5 > fedu <- as.data.frame(edu) > fedu Var1 Var2 Freq 1 M Střední 10 2 Ž Střední 20 3 M Vysokoškolské 4 4 Ž Vysokoškolské 3 5 M Vyšší odborné 2 6 Ž Vyšší odborné 0 7 M Vyučen/a 17 8 Ž Vyučen/a 8 9 M Základní 1 10 Ž Základní 5 |
a přidáme graf
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> ggplot(fedu, aes(x=Var2, y=Freq, fill=Var1)) + geom_bar(stat='identity', position=position_dodge()) + geom_text(aes(label=Freq), hjust=1.6, color="white",position = position_dodge(0.9), size=3.5) + coord_flip() + xlab('Vzdělání') + theme(axis.title.x = element_blank()) + ggtitle('Dosažené vzdělání') + labs(fill = 'Pohlaví') |
A co když budeme chtít jeden bar, ale rozdělený podle hodnot?
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# seridime podle Var2 a Freq > library(plyr) > fedu_s <- arrange(fedu, Var2, Freq) > fedu_s Var1 Var2 Freq 1 M Střední 10 2 Ž Střední 20 3 Ž Vysokoškolské 3 4 M Vysokoškolské 4 5 Ž Vyšší odborné 0 6 M Vyšší odborné 2 7 Ž Vyučen/a 8 8 M Vyučen/a 17 9 M Základní 1 10 Ž Základní 5 # a pridame souhrnny soucet, rozdeleny s kazdym jinym Var2 > fedu_s_sum <- ddply(fedu_s, 'Var2', transform, label_ypos=cumsum(Freq)) > fedu_s_sum Var1 Var2 Freq label_ypos 1 M Střední 10 10 2 Ž Střední 20 30 3 Ž Vysokoškolské 3 3 4 M Vysokoškolské 4 7 5 Ž Vyšší odborné 0 0 6 M Vyšší odborné 2 2 7 Ž Vyučen/a 8 8 8 M Vyučen/a 17 25 9 M Základní 1 1 10 Ž Základní 5 6 |
A graf
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ggplot(fedu_s_sum, aes(x=Var2, y=Freq, fill=Var1)) + geom_bar(stat='identity') + geom_text(aes(label=Freq, y=label_ypos), hjust=1.6, color="white", size=3.5) + coord_flip() + xlab('Vzdělání') + theme(axis.title.x = element_blank()) + ggtitle('Dosažené vzdělání') + labs(fill = 'Pohlaví') |
STM32F4Discovery + eLua + OSX
I fixed few bugs when compiling elua from git on osx – clone my branch clone official repo here.
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$ ./build_elua.lua board=stm32f4discovery |
create .bin file
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$ arm-none-eabi-objcopy -O binary elua_lua_stm32f4discovery.elf elua_lua_stm32f4discovery.bin |
create openocd config file for stm32f4 board:
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$ cat ~/stm32f4discovery.cfg # stm32f4discover board source [find interface/stlink-v2-1.cfg] transport select hla_swd source [find target/stm32f4x.cfg] reset_config srst_only |
and upload to the board:
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$ openocd -f ~/stm32f4discovery.cfg \ -c "init" \ -c "reset halt" \ -c "sleep 100" \ -c "wait_halt 2" -c "echo \"--- Writing elua_lua_stm32f4discovery.bin\"" \ -c "flash write_image erase elua_lua_stm32f4discovery.bin 0x08000000" \ -c "sleep 100" \ -c "echo \"--- Verifying\"" \ -c "verify_image elua_lua_stm32f4discovery.bin 0x08000000" \ -c "sleep 100" \ -c "echo \"--- Done\"" \ -c "resume" \ -c "shutdown" Open On-Chip Debugger 0.9.0 (2015-11-16-01:48) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD adapter speed: 2000 kHz adapter_nsrst_delay: 100 none separate srst_only separate srst_nogate srst_open_drain connect_deassert_srst Info : Unable to match requested speed 2000 kHz, using 1800 kHz Info : Unable to match requested speed 2000 kHz, using 1800 kHz Info : clock speed 1800 kHz Info : STLINK v2 JTAG v25 API v2 SWIM v14 VID 0x0483 PID 0x374B Info : using stlink api v2 Info : Target voltage: 2.884520 Info : stm32f4x.cpu: hardware has 6 breakpoints, 4 watchpoints target state: halted target halted due to debug-request, current mode: Thread xPSR: 0x01000000 pc: 0x080063f0 msp: 0x20000c78 --- Writing elua_lua_stm32f4discovery.bin auto erase enabled Info : device id = 0x10076413 Info : flash size = 1024kbytes wrote 262144 bytes from file elua_lua_stm32f4discovery.bin in 7.783807s (32.889 KiB/s) --- Verifying target state: halted target halted due to breakpoint, current mode: Thread xPSR: 0x61000000 pc: 0x2000002e msp: 0x20000c78 verified 220776 bytes in 2.229936s (96.685 KiB/s) --- Done shutdown command invoked |
Now you can connect to the board using /dev/tty.usbmodem621, 115200/8/n/1. You should get this prompt:
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eLua# eLua# help Shell commands: help - shell help lua - start a Lua session ls - lists files and directories dir - lists files and directories cat - list the contents of a file type - list the contents of a file recv - receive files via XMODEM cp - copy files mv - move/rename files rm - remove files ver - show version information mkdir - create directories exit - exit the shell For more information use 'help <command>'. eLua# lua Press CTRL+Z to exit Lua Lua 5.1.4 Copyright (C) 1994-2011 Lua.org, PUC-Rio > print(pd.board() .. "/" .. pd.platform() .. "/" .. pd.cpu()) STM32F4DISCOVERY/STM32F4/STM32F407VG |
enjoy :)
nodemcu – simple webserver
I’ve modified and updated this source:
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local SSID = "my_wifi_ssid" local SSID_PASSWORD = "my_wifi_password" local function http_header(conn) conn:send('HTTP/1.1 200 OK\n\n') conn:send('<!DOCTYPE HTML>\n') conn:send('<html>\n') conn:send('<head><meta content="text/html; charset=utf-8">\n') conn:send('<title>ESP8266 znouza test</title></head>\n') end local function connect (conn, data) local query_data conn:on ("receive", function (cn, req_data) query_data = get_http_req (req_data) print (query_data["METHOD"] .. " " .. " " .. query_data["User-Agent"]) http_header(cn) cn:send ("<body>") cn:send ("<h1>Hello World from ESP8266 and NodeMCU!!</h1>") cn:send ("</body></html>") -- Close the connection for the request cn:close ( ) end) end function wait_for_wifi_conn ( ) tmr.alarm (1, 1000, 1, function ( ) if wifi.sta.getip ( ) == nil then print ("Waiting for Wifi connection") else tmr.stop (1) print ("ESP8266 mode is: " .. wifi.getmode ( )) print ("The module MAC address is: " .. wifi.sta.getmac ( )) print ("Config done, IP is " .. wifi.sta.getip ( )) end end) end -- Build and return a table of the http request data function get_http_req (instr) local t = {} local first = nil local key, v, strt_ndx, end_ndx for str in string.gmatch (instr, "([^\n]+)") do -- First line in the method and path if (first == nil) then first = 1 strt_ndx, end_ndx = string.find (str, "([^ ]+)") v = trim (string.sub (str, end_ndx + 2)) key = trim (string.sub (str, strt_ndx, end_ndx)) t["METHOD"] = key t["REQUEST"] = v else -- Process and remaining ":" fields strt_ndx, end_ndx = string.find (str, "([^:]+)") if (end_ndx ~= nil) then v = trim (string.sub (str, end_ndx + 2)) key = trim (string.sub (str, strt_ndx, end_ndx)) t[key] = v end end end return t end -- String trim left and right function trim (s) return (s:gsub ("^%s*(.-)%s*$", "%1")) end -- Configure the ESP as a station (client) wifi.setmode (wifi.STATION) wifi.sta.config (SSID, SSID_PASSWORD,1) -- Hang out until we get a wifi connection before the httpd server is started. wait_for_wifi_conn ( ) -- Create the httpd server svr = net.createServer (net.TCP, 30) -- Server listening on port 80, call connect function if a request is received svr:listen (80, connect) |
nodemcu + el capitan
- download and install CH340g driver (check your FTDI chip)
- install CoolTerm (http://freeware.the-meiers.org/)
- install ESPlorer (http://esp8266.ru/esplorer/)
- open CoolTerm, options, choose appropriate /dev/cu.* port and connect
To flash
- download firmware
- Install esptool
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git clone https://github.com/themadinventor/esptool.git cd esptool sudo python ./setup.py install |
- upgrade firmware
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$ python ./esptool.py --port=/dev/cu.wchusbserial620 write_flash -fm=dio -fs=32m 0x00000 /tmp/nodemcu_integer_0.9.6-dev_20150704.bin Connecting... Erasing flash... Took 3.92s to erase flash block Wrote 450560 bytes at 0x00000000 in 54.1 seconds (66.6 kbit/s)... Leaving... |
iPhone5 power button repaired
Common issue. Power button got broken after a while, I switched to iPhone6, so this ‘old’ phone stayed forgotten. Then my son wanted to use it, so I had to repair it. Looked around, for the first time it as eligible to Apple repair program, but after a while my SN was removed, not sure why. Anyway, the off-warranty repair costs more than 2500CZK (w/o VAT), quite a lot. So I looked around and found few links. Ordered spare button/ribbon cable, few tools and .. got it repaired (but I have to admit, it was a tough fight) :)
Price to repair was (excluding tools) around $4.
Things ordered from Aliexpress:
- screwdriver (philips etc) with small bits
- spudger tool
- iSesamo opening tool
- switch flex table [spare part only needed]
Cool links to follow when repairing
PS: a small advice at the end. Sort your screws to small groups, on some sticker or a stick tape, put them in that order as removed – as there’s a bunch of really small screws and almost every one differs from others