M'nkhaniyi timagwiritsa ntchito , , ΠΈ Tidzakonza masanjidwe osasinthika a pulogalamu yapaintaneti. ndi njira yomwe imakulolani kuti musinthe nthawi yomweyo pulogalamu popanda kukana pempho limodzi. Ndi imodzi mwa njira zochepetsera kutsika kwa zero ndipo ndiyoyenera kugwiritsa ntchito nthawi imodzi, koma kutha kukweza yachiwiri, yokonzeka kuthamanga pafupi.
Tiyerekeze kuti muli ndi pulogalamu yapaintaneti yomwe makasitomala ambiri akugwira nayo ntchito, ndipo palibe njira yoti igone pansi kwa masekondi angapo. Ndipo muyenera kutulutsa zosintha za library, kukonza zolakwika, kapena china chatsopano. Muzochitika zabwinobwino, muyenera kuyimitsa pulogalamuyo, kuyisintha ndikuyiyambitsanso. Pankhani ya docker, mutha kuyisintha kaye, ndikuyiyambitsanso, koma padzakhalabe nthawi yomwe zopempha zofunsira sizingasinthidwe, chifukwa nthawi zambiri ntchitoyo imatenga nthawi kuti iyambike. Nanga bwanji zikayamba, koma zikuwoneka kuti sizikugwira ntchito? Ili ndiye vuto, tiyeni tithane nalo ndi njira zochepa komanso mokongola momwe tingathere.
ZOYENERA KUDZIWA: Zambiri mwa nkhanizi zimaperekedwa moyesera - monga kujambula gawo la console. Tikukhulupirira kuti izi sizikhala zovuta kumvetsetsa ndipo code idzalemba yokha mokwanira. Kwa mlengalenga, yerekezani kuti izi sizimangokhala mawu achinsinsi, koma pepala lochokera pamtundu wa "chitsulo".
Njira zochititsa chidwi zomwe ndizovuta kwa Google pongowerenga kachidindo zikufotokozedwa kumayambiriro kwa gawo lililonse. Ngati china chilichonse sichidziwika, google it ndikuwona. (mwamwayi, imagwiranso ntchito, chifukwa cha kutsegulidwa kwa telegalamu). Ngati simungathe kuchita chilichonse pa Google, funsani mu ndemanga. Ndidzakhala wokondwa kuwonjezera ku gawo lofananira "Njira Zosangalatsa".
Tiyeni tiyambe.
$ mkdir blue-green-deployment && cd $_utumiki
Tiyeni tipange ntchito yoyesera ndikuyiyika mu chidebe.
Njira zosangalatsa
cat << EOF > file-name( + ) ndi njira yopangira fayilo yamizere yambiri ndi lamulo limodzi. Chilichonse bash amawerenga kuchokera/dev/stdinpambuyo pa mzere uwu ndi kutsogolo kwa mzerewoEOFzidzalembedwa mufile-name.wget -qO- URL() - kutulutsa chikalata cholandilidwa kudzera pa HTTP ku/dev/stdout(analoguecurl URL).
SINDIKIZANI
Ndimaphwanya makamaka snippet kuti ndithandizire kuwunikira kwa Python. Pamapeto pake padzakhala chidutswa china chonga ichi. Ganizirani kuti m'malo awa pepalalo linadulidwa kuti litumizidwe ku dipatimenti yowunikira (komwe codeyo inali yojambulidwa ndi manja ndi zowunikira), ndiyeno zidutswazi zinakulungidwa mmbuyo.
$ cat << EOF > uptimer.pyfrom http.server import BaseHTTPRequestHandler, HTTPServer
from time import monotonic
app_version = 1
app_name = f'Uptimer v{app_version}.0'
loading_seconds = 15 - app_version * 5
class Handler(BaseHTTPRequestHandler):
def do_GET(self):
if self.path == '/':
try:
t = monotonic() - server_start
if t < loading_seconds:
self.send_error(503)
else:
self.send_response(200)
self.send_header('Content-Type', 'text/html')
self.end_headers()
response = f'<h2>{app_name} is running for {t:3.1f} seconds.</h2>n'
self.wfile.write(response.encode('utf-8'))
except Exception:
self.send_error(500)
else:
self.send_error(404)
httpd = HTTPServer(('', 8080), Handler)
server_start = monotonic()
print(f'{app_name} (loads in {loading_seconds} sec.) started.')
httpd.serve_forever()EOF
$ cat << EOF > Dockerfile
FROM python:alpine
EXPOSE 8080
COPY uptimer.py app.py
CMD [ "python", "-u", "./app.py" ]
EOF
$ docker build --tag uptimer .
Sending build context to Docker daemon 39.42kB
Step 1/4 : FROM python:alpine
---> 8ecf5a48c789
Step 2/4 : EXPOSE 8080
---> Using cache
---> cf92d174c9d3
Step 3/4 : COPY uptimer.py app.py
---> a7fbb33d6b7e
Step 4/4 : CMD [ "python", "-u", "./app.py" ]
---> Running in 1906b4bd9fdf
Removing intermediate container 1906b4bd9fdf
---> c1655b996fe8
Successfully built c1655b996fe8
Successfully tagged uptimer:latest
$ docker run --rm --detach --name uptimer --publish 8080:8080 uptimer
8f88c944b8bf78974a5727070a94c76aa0b9bb2b3ecf6324b784e782614b2fbf
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8f88c944b8bf uptimer "python -u ./app.py" 3 seconds ago Up 5 seconds 0.0.0.0:8080->8080/tcp uptimer
$ docker logs uptimer
Uptimer v1.0 (loads in 10 sec.) started.
$ wget -qSO- http://localhost:8080
HTTP/1.0 503 Service Unavailable
Server: BaseHTTP/0.6 Python/3.8.3
Date: Sat, 22 Aug 2020 19:52:40 GMT
Connection: close
Content-Type: text/html;charset=utf-8
Content-Length: 484
$ wget -qSO- http://localhost:8080
HTTP/1.0 200 OK
Server: BaseHTTP/0.6 Python/3.8.3
Date: Sat, 22 Aug 2020 19:52:45 GMT
Content-Type: text/html
<h2>Uptimer v1.0 is running for 15.4 seconds.</h2>
$ docker rm --force uptimer
uptimerReverse proxy
Kuti pulogalamu yathu isinthe mosazindikira, ndikofunikira kuti pakhale gulu lina kutsogolo kwake lomwe lingabise m'malo mwake. Itha kukhala seva yapaintaneti Π² . Reverse proxy imakhazikitsidwa pakati pa kasitomala ndi pulogalamuyo. Imavomereza zopempha kuchokera kwa makasitomala ndikuwatumizira ku pulogalamuyo ndikutumiza mayankho a pulogalamuyo kwa makasitomala.
Kugwiritsa ntchito ndi kubweza proxy kumatha kulumikizidwa mkati mwa docker pogwiritsa ntchito . Chifukwa chake, chidebe chomwe chili ndi pulogalamuyo sichifunikanso kutumiza doko pamakina olandirira; izi zimalola kuti pulogalamuyo ikhale yosiyana kwambiri ndi ziwopsezo zakunja.
Ngati woyimira kumbuyo akukhala pa wolandila wina, muyenera kusiya netiweki ya docker ndikulumikiza pulogalamuyo ku projekiti yakumbuyo kudzera pa netiweki yolandila, kutumiza doko. mapulogalamu parameter --publish, monga poyambira koyamba komanso ngati proxy yakumbuyo.
Tidzayendetsa projekiti yakumbuyo pa doko 80, chifukwa ili ndilo gawo lomwe liyenera kumvera maukonde akunja. Ngati port 80 ili yotanganidwa pa mayeso anu, sinthani parameter --publish 80:80 pa --publish ANY_FREE_PORT:80.
Njira zosangalatsa
- "Pamaukonde opangidwa ndi ogwiritsa ntchito a Docker, mutha kulumikizana ndi zotengera osati ndi adilesi ya IP yokha. Dzina lachidebelo limathetsedwanso mu adilesi yake ya IP" (, mfundo 5 ya code ya docker).
SINDIKIZANI
$ docker network create web-gateway
5dba128fb3b255b02ac012ded1906b7b4970b728fb7db3dbbeccc9a77a5dd7bd
$ docker run --detach --rm --name uptimer --network web-gateway uptimer
a1105f1b583dead9415e99864718cc807cc1db1c763870f40ea38bc026e2d67f
$ docker run --rm --network web-gateway alpine wget -qO- http://uptimer:8080
<h2>Uptimer v1.0 is running for 11.5 seconds.</h2>
$ docker run --detach --publish 80:80 --network web-gateway --name reverse-proxy nginx:alpine
80695a822c19051260c66bf60605dcb4ea66802c754037704968bc42527bf120
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
80695a822c19 nginx:alpine "/docker-entrypoint.β¦" 27 seconds ago Up 25 seconds 0.0.0.0:80->80/tcp reverse-proxy
a1105f1b583d uptimer "python -u ./app.py" About a minute ago Up About a minute 8080/tcp uptimer
$ cat << EOF > uptimer.conf
server {
listen 80;
location / {
proxy_pass http://uptimer:8080;
}
}
EOF
$ docker cp ./uptimer.conf reverse-proxy:/etc/nginx/conf.d/default.conf
$ docker exec reverse-proxy nginx -s reload
2020/06/23 20:51:03 [notice] 31#31: signal process started
$ wget -qSO- http://localhost
HTTP/1.1 200 OK
Server: nginx/1.19.0
Date: Sat, 22 Aug 2020 19:56:24 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: keep-alive
<h2>Uptimer v1.0 is running for 104.1 seconds.</h2>Kutumiza kopanda msoko
Tiyeni titulutse mtundu watsopano wa pulogalamuyi (ndi kukulitsa koyambira kawiri) ndikuyesa kuyiyika mosasamala.
Njira zosangalatsa
echo 'my text' | docker exec -i my-container sh -c 'cat > /my-file.txt'β Lembani mawumy textku file/my-file.txtmkati mwa chidebechomy-container.cat > /my-file.txt- Lembani zomwe zili mufayilo yokhazikika/dev/stdin.
SINDIKIZANI
$ sed -i "s/app_version = 1/app_version = 2/" uptimer.py
$ docker build --tag uptimer .
Sending build context to Docker daemon 39.94kB
Step 1/4 : FROM python:alpine
---> 8ecf5a48c789
Step 2/4 : EXPOSE 8080
---> Using cache
---> cf92d174c9d3
Step 3/4 : COPY uptimer.py app.py
---> 3eca6a51cb2d
Step 4/4 : CMD [ "python", "-u", "./app.py" ]
---> Running in 8f13c6d3d9e7
Removing intermediate container 8f13c6d3d9e7
---> 1d56897841ec
Successfully built 1d56897841ec
Successfully tagged uptimer:latest
$ docker run --detach --rm --name uptimer_BLUE --network web-gateway uptimer
96932d4ca97a25b1b42d1b5f0ede993b43f95fac3c064262c5c527e16c119e02
$ docker logs uptimer_BLUE
Uptimer v2.0 (loads in 5 sec.) started.
$ docker run --rm --network web-gateway alpine wget -qO- http://uptimer_BLUE:8080
<h2>Uptimer v2.0 is running for 23.9 seconds.</h2>
$ sed s/uptimer/uptimer_BLUE/ uptimer.conf | docker exec --interactive reverse-proxy sh -c 'cat > /etc/nginx/conf.d/default.conf'
$ docker exec reverse-proxy cat /etc/nginx/conf.d/default.conf
server {
listen 80;
location / {
proxy_pass http://uptimer_BLUE:8080;
}
}
$ docker exec reverse-proxy nginx -s reload
2020/06/25 21:22:23 [notice] 68#68: signal process started
$ wget -qO- http://localhost
<h2>Uptimer v2.0 is running for 63.4 seconds.</h2>
$ docker rm -f uptimer
uptimer
$ wget -qO- http://localhost
<h2>Uptimer v2.0 is running for 84.8 seconds.</h2>
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
96932d4ca97a uptimer "python -u ./app.py" About a minute ago Up About a minute 8080/tcp uptimer_BLUE
80695a822c19 nginx:alpine "/docker-entrypoint.β¦" 8 minutes ago Up 8 minutes 0.0.0.0:80->80/tcp reverse-proxyPanthawiyi, chithunzicho chimamangidwa mwachindunji pa seva, zomwe zimafuna kuti magwero ogwiritsira ntchito akhalepo, komanso amanyamula seva ndi ntchito yosafunikira. Chotsatira ndikugawira msonkhano wazithunzi kumakina osiyana (mwachitsanzo, ku kachitidwe ka CI) ndikusamutsira ku seva.
Kusamutsa zithunzi
Tsoka ilo, sizomveka kusamutsa zithunzi kuchokera ku localhost kupita ku localhost, kotero gawoli litha kufufuzidwa ngati muli ndi makamu awiri omwe ali ndi Docker pafupi. Pafupifupi zikuwoneka motere:
$ ssh production-server docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
$ docker image save uptimer | ssh production-server 'docker image load'
Loaded image: uptimer:latest
$ ssh production-server docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
uptimer latest 1d56897841ec 5 minutes ago 78.9MBtimu docker save imasunga deta yachithunzi mu .tar archive, kutanthauza kuti imalemera pafupifupi 1.5 kuposa momwe ingalemedwe ndi mawonekedwe oponderezedwa. Chifukwa chake tiyeni tizigwedeza m'dzina lakupulumutsa nthawi ndi magalimoto:
$ docker image save uptimer | gzip | ssh production-server 'zcat | docker image load'
Loaded image: uptimer:latestMukhozanso kuyang'anira ndondomeko yotsitsa (ngakhale izi zimafuna chida chachitatu):
$ docker image save uptimer | gzip | pv | ssh production-server 'zcat | docker image load'
25,7MiB 0:01:01 [ 425KiB/s] [ <=> ]
Loaded image: uptimer:latestLangizo: Ngati mukufuna mulu wa magawo kuti mulumikizane ndi seva kudzera pa SSH, mwina simukugwiritsa ntchito fayilo.
~/.ssh/config.
Kusamutsa chithunzi kudzera docker image save/load - Iyi ndi njira yochepetsetsa kwambiri, koma osati yokhayo. Palinso ena:
- Container Registry (muyeso wamakampani).
- Lumikizani ku seva ya daemon ya docker kuchokera kwa wina:
- kusintha kwa chilengedwe
DOCKER_HOST. - Njira ya mzere wa lamulo
-Hkapena--hostchidadocker-compose. docker context
- kusintha kwa chilengedwe
Njira yachiwiri (yomwe ili ndi njira zitatu zogwiritsira ntchito) ikufotokozedwa bwino m'nkhaniyi .
deploy.sh
Tsopano tiyeni tisonkhanitse zonse zomwe tidachita pamanja kukhala script imodzi. Tiyeni tiyambe ndi ntchito yapamwamba, ndiyeno tiyang'ane ena omwe amagwiritsidwa ntchito mmenemo.
Njira zosangalatsa
${parameter?err_msg}- imodzi mwamatsenga amatsenga a bash (aka ). Ngatiparameterosatchulidwa, zotulukaerr_msgndi kutuluka ndi code 1.docker --log-driver journald- mwachisawawa, dalaivala wodula mitengo ya docker ndi fayilo yamawu popanda kuzungulira. Ndi njira iyi, zipika zimadzaza diski yonse mwachangu, kotero kuti malo opangira zinthu azitha kusintha dalaivala kukhala wochenjera.
Deployment script
deploy() {
local usage_msg="Usage: ${FUNCNAME[0]} image_name"
local image_name=${1?$usage_msg}
ensure-reverse-proxy || return 2
if get-active-slot $image_name
then
local OLD=${image_name}_BLUE
local new_slot=GREEN
else
local OLD=${image_name}_GREEN
local new_slot=BLUE
fi
local NEW=${image_name}_${new_slot}
echo "Deploying '$NEW' in place of '$OLD'..."
docker run
--detach
--restart always
--log-driver journald
--name $NEW
--network web-gateway
$image_name || return 3
echo "Container started. Checking health..."
for i in {1..20}
do
sleep 1
if get-service-status $image_name $new_slot
then
echo "New '$NEW' service seems OK. Switching heads..."
sleep 2 # Ensure service is ready
set-active-slot $image_name $new_slot || return 4
echo "'$NEW' service is live!"
sleep 2 # Ensure all requests were processed
echo "Killing '$OLD'..."
docker rm -f $OLD
docker image prune -f
echo "Deployment successful!"
return 0
fi
echo "New '$NEW' service is not ready yet. Waiting ($i)..."
done
echo "New '$NEW' service did not raise, killing it. Failed to deploy T_T"
docker rm -f $NEW
return 5
}Zomwe zimagwiritsidwa ntchito:
ensure-reverse-proxy- Onetsetsani kuti projekiti yakumbuyo ikugwira ntchito (yothandiza pakutumiza koyamba)get-active-slot service_name- Imatsimikizira kuti ndi slot iti yomwe ikugwira ntchito pakali pano (BLUEkapenaGREEN)get-service-status service_name deployment_slot- Imatsimikizira ngati ntchitoyo ndi yokonzeka kukonza zopempha zomwe zikubweraset-active-slot service_name deployment_slot- Imasintha masinthidwe a nginx mu chidebe cha proxy chosinthira
Kuti:
ensure-reverse-proxy() {
is-container-up reverse-proxy && return 0
echo "Deploying reverse-proxy..."
docker network create web-gateway
docker run
--detach
--restart always
--log-driver journald
--name reverse-proxy
--network web-gateway
--publish 80:80
nginx:alpine || return 1
docker exec --interactive reverse-proxy sh -c "> /etc/nginx/conf.d/default.conf"
docker exec reverse-proxy nginx -s reload
}
is-container-up() {
local container=${1?"Usage: ${FUNCNAME[0]} container_name"}
[ -n "$(docker ps -f name=${container} -q)" ]
return $?
}
get-active-slot() {
local service=${1?"Usage: ${FUNCNAME[0]} service_name"}
if is-container-up ${service}_BLUE && is-container-up ${service}_GREEN; then
echo "Collision detected! Stopping ${service}_GREEN..."
docker rm -f ${service}_GREEN
return 0 # BLUE
fi
if is-container-up ${service}_BLUE && ! is-container-up ${service}_GREEN; then
return 0 # BLUE
fi
if ! is-container-up ${service}_BLUE; then
return 1 # GREEN
fi
}
get-service-status() {
local usage_msg="Usage: ${FUNCNAME[0]} service_name deployment_slot"
local service=${1?usage_msg}
local slot=${2?$usage_msg}
case $service in
# Add specific healthcheck paths for your services here
*) local health_check_port_path=":8080/" ;;
esac
local health_check_address="http://${service}_${slot}${health_check_port_path}"
echo "Requesting '$health_check_address' within the 'web-gateway' docker network:"
docker run --rm --network web-gateway alpine
wget --timeout=1 --quiet --server-response $health_check_address
return $?
}
set-active-slot() {
local usage_msg="Usage: ${FUNCNAME[0]} service_name deployment_slot"
local service=${1?$usage_msg}
local slot=${2?$usage_msg}
[ "$slot" == BLUE ] || [ "$slot" == GREEN ] || return 1
get-nginx-config $service $slot | docker exec --interactive reverse-proxy sh -c "cat > /etc/nginx/conf.d/$service.conf"
docker exec reverse-proxy nginx -t || return 2
docker exec reverse-proxy nginx -s reload
}ntchito get-active-slot amafuna kufotokozera pang'ono:
Chifukwa chiyani imabwezera nambala koma osatulutsa chingwe?
Komabe, mu ntchito yoyimba timawona zotsatira za ntchito yake, ndikuyang'ana njira yotuluka pogwiritsa ntchito bash ndikosavuta kuposa kuyang'ana chingwe. Kuphatikiza apo, kupeza chingwe kuchokera pamenepo ndikosavuta:
get-active-slot service && echo BLUE || echo GREEN.
Kodi zinthu zitatu ndizokwanira kusiyanitsa mayiko onse?
Ngakhale ziwiri zidzakhala zokwanira, chomaliza chiri pano kuti chikwaniritsidwe, kuti asalembe else.
Ntchito yokhayo yomwe imabwezeretsa nginx configs imakhalabe yosadziwika: get-nginx-config service_name deployment_slot. Poyerekeza ndi cheke chaumoyo, apa mutha kukhazikitsa masinthidwe aliwonse a ntchito iliyonse. Pazinthu zosangalatsa - zokha cat <<- EOF, zomwe zimakulolani kuchotsa ma tabo onse pachiyambi. Zoonadi, mtengo wa mapangidwe abwino ndi ma tabu osakanikirana ndi malo, omwe lero amaonedwa kuti ndi oipa kwambiri. Koma bash mphamvu ma tabo, komanso zingakhale bwino kukhala ndi masanjidwe wamba mu nginx config. Mwachidule, kusakaniza ma tabo ndi malo pano kumawoneka ngati yankho labwino kwambiri kuposa zoyipa. Komabe, simudzawona izi muzithunzi pansipa, popeza Habr "amachita bwino" posintha ma tabo onse kukhala mipata ya 4 ndikupanga EOF kukhala yosavomerezeka. .
Kuti musadzuke kawiri, ndikukuuzani nthawi yomweyo
cat << 'EOF', zomwe tidzakumana nazo pambuyo pake. Ngati mulemba mophwekacat << EOF, ndiye mkati mwa heredoc chingwecho chimalowetsedwa (zosinthika zimakulitsidwa ($foo), kuyimba foni ($(bar)) etc.), ndipo ngati mutseke mapeto a chikalata m'mawu amodzi, ndiye kuti kutanthauzira kumayimitsidwa ndipo chizindikirocho$ikuwonetsedwa ngati. Zomwe mukufunikira kuti muyike script mkati mwa script ina.
get-nginx-config() {
local usage_msg="Usage: ${FUNCNAME[0]} service_name deployment_slot"
local service=${1?$usage_msg}
local slot=${2?$usage_msg}
[ "$slot" == BLUE ] || [ "$slot" == GREEN ] || return 1
local container_name=${service}_${slot}
case $service in
# Add specific nginx configs for your services here
*) nginx-config-simple-service $container_name:8080 ;;
esac
}
nginx-config-simple-service() {
local usage_msg="Usage: ${FUNCNAME[0]} proxy_pass"
local proxy_pass=${1?$usage_msg}
cat << EOF
server {
listen 80;
location / {
proxy_pass http://$proxy_pass;
}
}
EOF
}Ili ndiye script yonse. Ndipo kenako kutsitsa kudzera pa wget kapena curl.
Kukhazikitsa zolembedwa za parameterized pa seva yakutali
Ndi nthawi kugogoda pa chandamale seva. Nthawiyi localhost zabwino ndithu:
$ ssh-copy-id localhost
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
himura@localhost's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'localhost'"
and check to make sure that only the key(s) you wanted were added.Talemba script yotumizira yomwe imatsitsa chithunzi chomwe chidamangidwa kale ku seva yomwe mukufuna ndikulowetsa m'malo mwa chidebe chautumiki, koma tingachigwiritse bwanji pamakina akutali? Cholembacho chili ndi zotsutsana, chifukwa ndi zapadziko lonse lapansi ndipo zimatha kutumiza mautumiki angapo nthawi imodzi pansi pa projekiti imodzi (mutha kugwiritsa ntchito nginx configs kuti mudziwe ulalo uti womwe ukhala ntchito). Zolemba sizingasungidwe pa seva, chifukwa pakadali pano sitingathe kuzisintha zokha (chifukwa cha kukonza zolakwika ndikuwonjezera mautumiki atsopano), ndipo nthawi zambiri, boma = zoyipa.
Yankho 1: Sunganibe zolemba pa seva, koma zikoperani nthawi zonse scp. Kenako gwirizanitsani kudzera ssh ndikuchita script ndi mfundo zofunika.
Wotsatsa:
- Zochita ziwiri m'malo mwa chimodzi
- Sipangakhale malo omwe mumakopera, kapena sangakhale nawo, kapena script ikhoza kuchitidwa panthawi yolowa m'malo.
- Ndikoyenera kudziyeretsa nokha (chotsani script).
- Kale zochita zitatu.
Yankho 2:
- Sungani matanthauzidwe a ntchito mu script ndipo musamachite chilichonse
- Ndi chithandizo cha
sedonjezani kuyimba ntchito kumapeto - Tumizani zonse mwachindunji ku shh kudzera papaipi (
|)
Zotsatira:
- Zopanda malire
- Palibe ma boilerplate mabungwe
- Kumverera bwino
Tingochita popanda Ansible. Inde, zonse zidapangidwa kale. Inde, njinga. Onani momwe njinga ilili yosavuta, yokongola komanso minimalistic:
$ cat << 'EOF' > deploy.sh#!/bin/bash
usage_msg="Usage: $0 ssh_address local_image_tag"
ssh_address=${1?$usage_msg}
image_name=${2?$usage_msg}
echo "Connecting to '$ssh_address' via ssh to seamlessly deploy '$image_name'..."
( sed "$a deploy $image_name" | ssh -T $ssh_address ) << 'END_OF_SCRIPT'
deploy() {
echo "Yay! The '${FUNCNAME[0]}' function is executing on '$(hostname)' with argument '$1'"
}
END_OF_SCRIPTEOF
$ chmod +x deploy.sh
$ ./deploy.sh localhost magic-porridge-pot
Connecting to localhost...
Yay! The 'deploy' function is executing on 'hut' with argument 'magic-porridge-pot'Komabe, sitingakhale otsimikiza kuti wolandila kutali ali ndi bash yokwanira, ndiye tiwonjeza cheke yaying'ono poyambira (izi ndi m'malo mwa ):
if [ "$SHELL" != "/bin/bash" ]
then
echo "The '$SHELL' shell is not supported by 'deploy.sh'. Set a '/bin/bash' shell for '$USER@$HOSTNAME'."
exit 1
fiNdipo tsopano ndi zenizeni:
$ docker exec reverse-proxy rm /etc/nginx/conf.d/default.conf
$ wget -qO deploy.sh https://git.io/JUURc
$ chmod +x deploy.sh
$ ./deploy.sh localhost uptimer
Sending gzipped image 'uptimer' to 'localhost' via ssh...
Loaded image: uptimer:latest
Connecting to 'localhost' via ssh to seamlessly deploy 'uptimer'...
Deploying 'uptimer_GREEN' in place of 'uptimer_BLUE'...
06f5bc70e9c4f930e7b1f826ae2ca2f536023cc01e82c2b97b2c84d68048b18a
Container started. Checking health...
Requesting 'http://uptimer_GREEN:8080/' within the 'web-gateway' docker network:
HTTP/1.0 503 Service Unavailable
wget: server returned error: HTTP/1.0 503 Service Unavailable
New 'uptimer_GREEN' service is not ready yet. Waiting (1)...
Requesting 'http://uptimer_GREEN:8080/' within the 'web-gateway' docker network:
HTTP/1.0 503 Service Unavailable
wget: server returned error: HTTP/1.0 503 Service Unavailable
New 'uptimer_GREEN' service is not ready yet. Waiting (2)...
Requesting 'http://uptimer_GREEN:8080/' within the 'web-gateway' docker network:
HTTP/1.0 200 OK
Server: BaseHTTP/0.6 Python/3.8.3
Date: Sat, 22 Aug 2020 20:15:50 GMT
Content-Type: text/html
New 'uptimer_GREEN' service seems OK. Switching heads...
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
2020/08/22 20:15:54 [notice] 97#97: signal process started
The 'uptimer_GREEN' service is live!
Killing 'uptimer_BLUE'...
uptimer_BLUE
Total reclaimed space: 0B
Deployment successful!Tsopano mutha kutsegula mu msakatuli, yendetsani kutumiziranso ndikuwonetsetsa kuti imayenda mosasunthika pokonzanso tsambalo molingana ndi ma CD panthawi ya masanjidwe.
Osaiwala kuyeretsa mukamaliza ntchito :3
$ docker rm -f uptimer_GREEN reverse-proxy
uptimer_GREEN
reverse-proxy
$ docker network rm web-gateway
web-gateway
$ cd ..
$ rm -r blue-green-deploymentSource: www.habr.com