Kwj npo rau ntau yam khoom siv hauv lub network

Kuv muaj qhov xav tau los tso saib lub dashboard nrog kev saib xyuas ntawm ntau lub vijtsam hauv chaw ua haujlwm. Muaj ob peb lub qub Raspberry Pi Model B + thiab hypervisor nrog yuav luag tsis txwv cov peev txheej.

Pom tau tias Raspberry Pi Model B + tsis muaj qhov txaus ntshai los ua kom lub browser tsis tu ncua thiab ua haujlwm ntau ntawm cov duab hauv nws, vim tias nws tshwm sim tias nplooj ntawv yog ib nrab buggy thiab feem ntau tsoo.

Muaj kev daws teeb meem yooj yim thiab muaj kuab heev, uas kuv xav qhia rau koj.

Raws li koj paub, tag nrho cov Raspberries muaj ib tug ncaj haib video processor, uas yog zoo rau hardware video decoding. Yog li lub tswv yim tau los mus tso lub browser nrog lub dashboard nyob rau lwm qhov, thiab hloov cov kwj npaj txhij nrog ib daim duab rendered rau lub raspberry.

Ntxiv rau, qhov no yuav tsum muaj kev tswj kom yooj yim, txij li qhov no txhua qhov kev teeb tsa yuav ua tiav ntawm ib lub tshuab virtual, uas yooj yim dua los hloov kho thiab thaub qab.

Tsis tau hais sai dua li ua tiav.

Server part

Peb siv npaj Cloud Image rau Ubuntu. Yuav tsum tsis muaj kev teeb tsa, nws muaj txhua yam koj xav tau sai sai xa lub tshuab virtual, thiab CloudInit txhawb nqa pab kom teeb tsa lub network tam sim, ntxiv cov yuam sij ssh thiab muab tso rau hauv kev ua haujlwm sai.

Peb xa ib lub tshuab virtual tshiab thiab ua ntej ntawm tag nrho nruab rau nws Xorg, noj и flux lub thawv:

apt-get update
apt-get install -y xserver-xorg nodm fluxbox
sed -i 's/^NODM_USER=.*/NODM_USER=ubuntu/' /etc/default/nodm

Peb kuj yuav siv lub config rau Xorg, ua siab zoo tso cai peb Diego Ongaro, ntxiv tsuas yog qhov kev daws teeb meem tshiab 1920 × 1080, txij li tag nrho peb cov saib yuav siv nws:

cat > /etc/X11/xorg.conf <<EOT
Section "Device"
    Identifier      "device"
    Driver          "vesa"
EndSection

Section "Screen"
    Identifier      "screen"
    Device          "device"
    Monitor         "monitor"
    DefaultDepth    16
    SubSection "Display"
        Modes       "1920x1080" "1280x1024" "1024x768" "800x600"
    EndSubSection
EndSection

Section "Monitor"
    Identifier      "monitor"
    HorizSync       20.0 - 50.0
    VertRefresh     40.0 - 80.0
    Option          "DPMS"
EndSection

Section "ServerLayout"
    Identifier      "layout"
    Screen          "screen"
EndSection
EOT

systemctl restart nodm

Tam sim no peb yuav nruab Firefox, peb yuav khiav nws ua ib qho kev pabcuam, yog li rau ib yam peb yuav sau ib chav tsev rau nws:

apt-get install -y firefox xdotool

cat > /etc/systemd/system/firefox.service <<EOT
[Unit]
Description=Firefox
After=network.target

[Service]
Restart=always
User=ubuntu
Environment="DISPLAY=:0"
Environment="XAUTHORITY=/home/ubuntu/.Xauthority"
ExecStart=/usr/bin/firefox -url 'http://example.org/mydashboard'
ExecStartPost=/usr/bin/xdotool search --sync --onlyvisible --class "Firefox" windowactivate key F11

[Install]
WantedBy=graphical.target
EOT

systemctl enable firefox
systemctl start firefox

Peb xav tau Xdotool thiaj li khiav firefox tam sim ntawd hauv puv npo hom.
Siv cov parameter -url koj tuaj yeem qhia txhua nplooj ntawv kom nws qhib tau thaum browser pib.

Nyob rau theem no, peb lub kiosk tau npaj txhij, tab sis tam sim no peb yuav tsum tau xa tawm cov duab hauv lub network mus rau lwm cov saib thiab cov khoom siv. Ua li no, peb yuav siv qhov muaj peev xwm Tawm suab JPEG, ib hom ntawv feem ntau siv rau streaming video los ntawm feem ntau webcams.

Rau qhov no peb xav tau ob yam: FFmpeg nrog module x 11 ra, rau ntes cov duab los ntawm x's thiab streamEye, uas yuav muab faib rau peb cov neeg siv khoom:

apt-get install -y make gcc ffmpeg 

cd /tmp/
wget https://github.com/ccrisan/streameye/archive/master.tar.gz
tar xvf master.tar.gz 
cd streameye-master/
make
make install

cat > /etc/systemd/system/streameye.service <<EOT
[Unit]
Description=streamEye
After=network.target

[Service]
Restart=always
User=ubuntu
Environment="DISPLAY=:0"
Environment="XAUTHORITY=/home/ubuntu/.Xauthority"
ExecStart=/bin/sh -c 'ffmpeg -f x11grab -s 1920x1080 -i :0 -r 1 -f mjpeg -q:v 5 - 2>/dev/null | streameye'

[Install]
WantedBy=graphical.target
EOT

systemctl enable streameye
systemctl start streameye

Txij li thaum peb daim duab tsis tas yuav hloov kho sai, kuv tau teev tus nqi refresh: 1 thav duab ib ob (parameter -r 1) thiab compression zoo: 5 (parameter -q:v 5)

Tam sim no cia sim mus rau http://your-vm:8080/, nyob rau hauv teb koj yuav pom ib tug tas li hloov tshiab screenshot ntawm lub desktop. Zoo heev! - yam xav tau.

Cov neeg siv khoom sab

Nws tseem yooj yim dua ntawm no, raws li kuv tau hais, peb yuav siv Raspberry Pi Model B +.

Ua ntej tshaj, cia peb nruab nws Koov Linux ARM, rau qhov no peb ua raws cov lus qhia nyob rau lub vas sab nom tswv.

Peb tseem yuav tau faib ntau lub cim xeeb rau peb cov video nti, rau qhov no peb yuav hloov kho /boot/config.txt

gpu_mem=128

Cia peb khau raj peb qhov system tshiab thiab tsis txhob hnov ​​​​qab pib lub pacman keyring, nruab OMXPlayer:

pacman -Sy omxplayer

Remarkably, OMXPlayer tuaj yeem ua haujlwm yam tsis muaj x, yog li txhua yam peb xav tau yog sau cov ntaub ntawv rau nws thiab khiav:

cat > /etc/systemd/system/omxplayer.service <<EOT
[Unit]
Description=OMXPlayer
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
Restart=always
ExecStart=/usr/bin/omxplayer -r --live -b http://your-vm:8080/ --aspect-mode full

[Install]
WantedBy=multi-user.target
EOT

systemctl enable omxplayer
systemctl start omxplayer

Raws li ib tug parameter -b http://your-vm:8080/ peb dhau qhov url los ntawm peb lub server.

Ntawd yog tag nrho, ib daim duab los ntawm peb cov neeg rau zaub mov yuav tsum tshwm sim tam sim ntawm qhov screen txuas. Yog tias muaj teeb meem, cov kwj yuav rov pib dua thiab cov neeg siv yuav rov txuas rau nws.

Raws li ib qho ntxiv, koj tuaj yeem nruab cov duab uas tau tshwm sim los ua ib qho screensaver ntawm txhua lub khoos phis tawj hauv chaw ua haujlwm. Rau qhov no koj yuav xav tau MPV и XScreenSaver:

mode:  one
selected: 0
programs:              
     "Monitoring Screen"  mpv --really-quiet --no-audio --fs       
      --loop=inf --no-stop-screensaver       
      --wid=$XSCREENSAVER_WINDOW        
      http://your-vm:8080/      n
    maze -root        n
    electricsheep --root 1       n

Tam sim no koj cov npoj yaig yuav zoo siab heev 🙂

Tau qhov twg los: www.hab.com