{"id":35323,"date":"2019-10-31T22:03:38","date_gmt":"2019-10-31T19:03:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/slyorm-gusenitsa-prevratilas-v-babochku\/"},"modified":"2019-10-31T22:03:38","modified_gmt":"2019-10-31T19:03:38","slug":"slyorm-gusenitsa-prevratilas-v-babochku","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/slyorm-gusenitsa-prevratilas-v-babochku","title":{"rendered":"Sl\u011br: housenka se prom\u011bnila v mot\u00fdla","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Sl\u011br: housenka se prom\u011bnila v mot\u00fdla\" src=\"\/wp-content\/uploads\/2019\/06\/9067ea4d43f2c4f7fd0b472df28f59c8.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<h2 id=\"tldr\">&lt;TL;DR&gt;<\/h2>\n<p><\/p>\n<ol>\n<li>Slurm skute\u010dn\u011b umo\u017e\u0148uje pono\u0159it se do t\u00e9matu Kubernetes nebo si vylep\u0161it sv\u00e9 znalosti.<\/li>\n<li>\u00da \u00fa\u010dastn\u00edci jsou spokojeni. Ti, kte\u0159\u00ed se nic nov\u00e9ho nenau\u010dili nebo nevy\u0159e\u0161ili sv\u00e9 probl\u00e9my, jsou v zanedbateln\u00e9m po\u010dtu. Bezpodm\u00edne\u010dn\u011b maniback b\u011bhem prvn\u00edho dne (\u201ePokud m\u00e1te pocit, \u017ee Slurm nen\u00ed pro v\u00e1s, vr\u00e1t\u00edme plnou cenu vstupenky\u201c) vyu\u017eil pouze jeden \u010dlov\u011bk, od\u016fvodniv to p\u0159ehnan\u00fdm sebev\u011bdom\u00edm.<\/li>\n<li>Dal\u0161\u00ed Slurm se uskute\u010dn\u00ed za\u010d\u00e1tkem z\u00e1\u0159\u00ed v Petrohradu. Selectel, n\u00e1\u0161 st\u00e1lej\u0161\u00ed sponzor, poskytuje nejen cloud pro st\u00e1nky, ale tak\u00e9 sv\u016fj konferen\u010dn\u00ed s\u00e1l.<\/li>\n<li>Opakujeme z\u00e1kladn\u00ed Slurm (9.\u201311. z\u00e1\u0159\u00ed) a p\u0159edstavujeme nov\u00fd program: Slurm DevOps (4.\u20136. z\u00e1\u0159\u00ed).<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2 id=\"chto-takoe-slyorm-i-kak-on-izmenilsya\">Co je Slurm a jak se zm\u011bnil<\/h2>\n<p><\/p>\n<p>P\u0159ed rokem jsme m\u011bli n\u00e1pad uspo\u0159\u00e1dat kurzy o Kubernetes. V srpnu '18 prob\u011bhl Sl\u00f8rm-1: n\u00e1ro\u010dn\u00fd, s kontinu\u00e1ln\u00ed prezentac\u00ed (kdy se prezentace doladila ji\u017e na p\u00f3diu), s \u0159adou ka\u017edodenn\u00edch probl\u00e9m\u016f. Zkou\u0161ky n\u00e1s stmelily: \u00fa\u010dastn\u00edci prvn\u00edho Sl\u00f8rmu, jako Bratrstvo Prstenu, se st\u00e1le navz\u00e1jem kontaktuj\u00ed.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sl\u011br: housenka se prom\u011bnila v mot\u00fdla\" src=\"\/wp-content\/uploads\/2019\/06\/2a6d73eceb41a3c234a26e459cb168cd.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>Tak vypadala Slurm-1<\/em><\/p>\n<p><\/p>\n<p>Na prvn\u00edm Sl\u00f8rmu se zrodil n\u00e1pad uspo\u0159\u00e1dat MegaSl\u00f8rm. Zeptali jsme se lid\u00ed, kter\u00e9 t\u00e9mata je zaj\u00edmaj\u00ed, a v \u0159\u00edjnu jsme uspo\u0159\u00e1dali pokro\u010dil\u00fd kurz \u201eNa po\u017e\u00e1d\u00e1n\u00ed \u00fa\u010dastn\u00edk\u016f\u201c. Dopadlo to zaj\u00edmav\u011b, ale jako jednor\u00e1zov\u00e1 akce. Do kv\u011btna '19 jsme p\u0159ipravili skute\u010dn\u00fd pokro\u010dil\u00fd kurz, s vlastn\u00ed logikou a vnit\u0159n\u00edm p\u0159\u00edb\u011bhem.<\/p>\n<p><\/p>\n<p>Za rok Slurm organiza\u010dn\u011b transformoval:<br \/>\n\u2014 Docker a Ansible byly vyjmuty z hlavn\u00edho programu a ud\u011blaly se samostatn\u00e9 online kurzy.<br \/>\n\u2014 Organizovali jsme technickou podporu, kter\u00e1 pom\u00e1h\u00e1 student\u016fm \u0159e\u0161it probl\u00e9my s u\u010debn\u00edmi clustery.<br \/>\n\u2014 P\u0159edn\u00e1\u0161ej\u00edc\u00ed z\u00edskali metodickou podporu.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sl\u011br: housenka se prom\u011bnila v mot\u00fdla\" src=\"\/wp-content\/uploads\/2019\/06\/df50b156ac07048fadb0d5fdee127ff3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<em>T\u00fdm, kter\u00fd se pod\u00edlel na Slurm-4<\/em><\/p>\n<p><\/p>\n<h2 id=\"otzyvy-uchastnikov\">Hodnocen\u00ed \u00fa\u010dastn\u00edk\u016f<\/h2>\n<p><\/p>\n<p>Byl p\u0159ekon\u00e1n dal\u0161\u00ed rekord: 170 \u00fa\u010dastn\u00edk\u016f na z\u00e1kladn\u00edm Slurmu, 75 na MegaSlurmu.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sl\u011br: housenka se prom\u011bnila v mot\u00fdla\" src=\"\/wp-content\/uploads\/2019\/06\/c38db60feaebc11a56fed6906f0ededa.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Slurm-4<br \/>\nFormul\u00e1\u0159 zp\u011btn\u00e9 vazby vyplnilo 101 osob z 170.<\/p>\n<p><\/p>\n<p>Pochopil jsem Kubernetes?<br \/>\n41 \u2014 Zat\u00edm k8s nerozum\u00edm, ale vid\u00edm, kam kopat.<br \/>\n36 \u2014 D\u0159\u00edve jsem k8s neznal, te\u010f jsem to pochopil.<br \/>\n23 \u2014 K8s jsem znal u\u017e d\u0159\u00edve, te\u010f to zn\u00e1m l\u00e9pe.<br \/>\n1 \u2014 Nic nov\u00e9ho jsem se nenau\u010dil.<br \/>\n0 \u2014 O k8s jsem nic nepochopil. <\/p>\n<p><\/p>\n<p>Jak\u00e1 byla intenzita Slurmu? <\/p>\n<p><\/p>\n<p>16 lid\u00ed si mysl\u00ed, \u017ee Slurm prob\u00edh\u00e1 p\u0159\u00edli\u0161 jednodu\u0161e a pomalu, a 14 \u2013 \u017ee p\u0159\u00edli\u0161 slo\u017eit\u011b a rychle. Ostatn\u00edm to vyhovuje.<\/p>\n<p><\/p>\n<p>Vy\u0159e\u0161ili jste probl\u00e9m, se kter\u00fdm jste p\u0159ijeli na Slurm? <\/p>\n<p><\/p>\n<p>90 \u2014 Ano.<br \/>\n11 \u2014 Ne.<\/p>\n<p><\/p>\n<p>MegaSlurm<\/p>\n<p><\/p>\n<p>40 lid\u00ed vyplnilo kontaktn\u00ed formul\u00e1\u0159. 2 lid\u00e9 uvedli, \u017ee to bylo p\u0159\u00edli\u0161 jednoduch\u00e9 a pomal\u00e9. 1 \u010dlov\u011bk nevy\u0159e\u0161il \u00fakol, se kter\u00fdm p\u0159i\u0161el na Megu. Ostatn\u00edm bylo v\u0161e v po\u0159\u00e1dku.<\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/serveradmin.ru\/otzyv-o-slerm-kak-ya-prohodil-obuchenie-po-kubernetes\/\">Recenze na Sl\u00f6rm na https:\/\/serveradmin.ru<\/a><\/noindex><\/p>\n<p><\/p>\n<h2 id=\"otzyvy-spikerov\">Recenze \u0159e\u010dn\u00edk\u016f<\/h2>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sl\u011br: housenka se prom\u011bnila v mot\u00fdla\" src=\"\/wp-content\/uploads\/2019\/06\/cfbeb0b99d4c835bd1ab05925806c887.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Zat\u00edmco na sl\u00f6rmu v Petrohrad\u011b v \u00fanoru byli p\u0159ev\u00e1\u017en\u011b nov\u00e1\u010dci, na moskevsk\u00e9m sl\u00f6rmu u\u017e lid\u00e9 v\u011bt\u0161inou vyzkou\u0161eli Kubernetes. Bylo mnoho pokro\u010dil\u00fdch ot\u00e1zek, kter\u00e9 n\u00e1s donutily p\u0159em\u00fd\u0161let.<\/p>\n<p><\/p>\n<p>Pokud se v Petrohrad\u011b ptali, kdy zve\u0159ejn\u00edme sv\u016fj fork kubespray, v Moskv\u011b u\u017e se ptali, pro\u010d nab\u00edz\u00edme pou\u017eit\u00ed na\u0161eho forku a nebereme origin\u00e1ln\u00ed kubespray. To u\u017e je kritick\u00e9 my\u0161len\u00ed mid-level a senior\u016f.<\/p>\n<p><\/p>\n<p>Praktick\u00e9 cvi\u010den\u00ed bylo slo\u017eit\u00e9, lid\u00e9 d\u011blali mnoho chyb, a to je skv\u011bl\u00e9: mus\u00edme si natlouct nos ve \u0161kole, a ne v boji.<\/p>\n<p><\/p>\n<p>Pravideln\u011b jsme se setk\u00e1vali s limity na z\u00edsk\u00e1n\u00ed certifik\u00e1t\u016f, limity na stahov\u00e1n\u00ed z Githubu atd. To je \u017eivot \u2014 najednou jsme v cloudu Selectel rozjeli kolem 200 cluster\u016f. Nikdo sv\u00e9 zdroje a limity na to nep\u0159ipravuje. <\/p>\n<p><\/p>\n<h2 id=\"anons-slyorma-v-selectel\">Ozn\u00e1men\u00ed o Sl\u00f6rmu v Selectel<\/h2>\n<p><\/p>\n<p>\u2192 <noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/?utm_source=habr\">Registrace na Sl\u00f6rm-5<\/a><\/noindex><br \/>\nCena: 25 000 \u20bd<\/p>\n<p>\n<b class=\"spoiler_title\">Program:<\/b><\/p>\n<p>T\u00e9ma \u010d. 1: Sezn\u00e1men\u00ed s Kubernetes, z\u00e1kladn\u00ed komponenty<br \/>\n\u2014 \u00davod do technologie k8s. Popis, pou\u017eit\u00ed, koncepty<br \/>\n\u2014 Pod, ReplicaSet, Deployment, Service, Ingress, PV, PVC, ConfigMap, Secret<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 2: Struktura clustru, z\u00e1kladn\u00ed komponenty, odolnost, s\u00ed\u0165 k8s<br \/>\n\u2014 Architektura clusteru, hlavn\u00ed komponenty, odolnost proti chyb\u00e1m<br \/>\n\u2014 S\u00ed\u0165 k8s<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 3: Kubespray, lad\u011bn\u00ed a konfigurace clustru Kubernetes<br \/>\n\u2014 Kubespray, konfigurace a lad\u011bn\u00ed clusteru Kubernetes<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 4: Pokro\u010dil\u00e9 abstrakce Kubernetes<br \/>\n\u2014 DaemonSet, StatefulSet, RBAC, Job, CronJob, Pod Scheduling, InitContainer<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 5: Publikov\u00e1n\u00ed slu\u017eeb a aplikac\u00ed<br \/>\n\u2014 P\u0159ehled metod publikov\u00e1n\u00ed slu\u017eeb: NodePort vs LoadBalancer vs Ingress<br \/>\n\u2014 Ingress controller (Nginx): vyva\u017eujeme p\u0159\u00edchoz\u00ed provoz<br \/>\n\u2014 Cert-manager: automaticky z\u00edsk\u00e1v\u00e1me certifik\u00e1ty SSL\/TLS<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 6: \u00davod do Helm<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 7: Instalace cert-manageru<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 8: Ceph: instalace v re\u017eimu \u201ed\u011blej jako j\u00e1\u201c<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 9: Logov\u00e1n\u00ed a monitoring<br \/>\n\u2014 Monitoring clusteru, Prometheus<br \/>\n\u2014 Logov\u00e1n\u00ed clusteru, Fluentd\/Elastic\/Kibana<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 10: Aktualizace clusteru<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 11: Praktick\u00e1 pr\u00e1ce, dockerizace aplikace a spu\u0161t\u011bn\u00ed v clusteru<\/p>\n<p><\/p>\n<p>Kurzy o Dockeru a Ansible na stepik.org jsou zahrnuty v cen\u011b.<\/p>\n<p><\/p>\n<p>\u2192 <noindex><a rel=\"nofollow\" href=\"https:\/\/slurm.io\/devops\/?utm_source=habr\">Registrace na Sl\u00f6rm DevOps<\/a><\/noindex><br \/>\nCena: 45 000 \u20bd<\/p>\n<p>\n<b class=\"spoiler_title\">Program:<\/b><\/p>\n<p>T\u00e9ma \u010d. 1: \u00davod do Gitu<br \/>\n\u2014 Z\u00e1kladn\u00ed p\u0159\u00edkazy git init, commit, add, diff, log, status, pull, push<br \/>\n\u2014 Nastaven\u00ed lok\u00e1ln\u00edho prost\u0159ed\u00ed: praktick\u00e1 doporu\u010den\u00ed<br \/>\n\u2014 Git flow, v\u011btve a tagy, strategie slou\u010den\u00ed<br \/>\n\u2014 Pr\u00e1ce s n\u011bkolika remote repo<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 2: T\u00fdmov\u00e1 pr\u00e1ce s Git<br \/>\n\u2014 GitHub flow<br \/>\n\u2014 Fork, remote, pull request<br \/>\n\u2014 Konflikty, releasy, je\u0161t\u011b jednou o Gitflow a dal\u0161\u00edch flow pro t\u00fdmy<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 3: CI\/CD \u00favod do automatizace<br \/>\n\u2014 Automatizace v Gitu (boti, \u00favod do CI, hooky)<br \/>\n\u2014 N\u00e1stroje (bash, make, gradle)<br \/>\n\u2014 Tov\u00e1rn\u00ed linky pro mont\u00e1\u017e a jejich vyu\u017eit\u00ed v IT<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 4: CI\/CD: Pr\u00e1ce s Gitlabem<br \/>\n\u2014 Sestaven\u00ed, testov\u00e1n\u00ed, nasazen\u00ed<br \/>\n\u2014 Etapy, prom\u011bnn\u00e9, \u0159\u00edzen\u00ed prov\u00e1d\u011bn\u00ed (only, when, include)<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 5: Pr\u00e1ce s aplikac\u00ed z pohledu v\u00fdvoje<br \/>\n\u2014 P\u00ed\u0161eme mikroslu\u017ebu v Pythonu (v\u010detn\u011b test\u016f)<br \/>\n\u2014 Vyu\u017eit\u00ed docker-compose ve v\u00fdvoji<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 6: Infrastruktura jako k\u00f3d<br \/>\n\u2014 IaC: p\u0159\u00edstup k infrastruktu\u0159e jako k\u00f3du<br \/>\n\u2014 IaC na p\u0159\u00edkladu Terraformu<br \/>\n\u2014 IaC na p\u0159\u00edkladu Ansible<br \/>\n\u2014 Idempotence, deklarativnost<br \/>\n\u2014 Praxe tvo\u0159en\u00ed Ansible playbook\u016f<br \/>\n\u2014 Ukl\u00e1d\u00e1n\u00ed konfigurac\u00ed, spolupr\u00e1ce, automatizace aplikac\u00ed<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 7: Testov\u00e1n\u00ed infrastruktury<br \/>\n\u2014 Testov\u00e1n\u00ed a kontinu\u00e1ln\u00ed integrace s Molecule a Gitlab CI<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 8: Automatizace spu\u0161t\u011bn\u00ed server\u016f<br \/>\n\u2014 Sestavujeme obrazy<br \/>\n\u2014 PXE a DHCP<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 9: Automatizace infrastruktury<br \/>\n\u2014 P\u0159\u00edklad infrastrukturn\u00ed slu\u017eby pro autorizaci na serverech<br \/>\n\u2014 ChatOps (integrace messenger\u016f s pipeline)<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 10: Automatizace bezpe\u010dnosti<br \/>\n\u2014 Podpis artefakt\u016f CI\/CD<br \/>\n\u2014 Skenov\u00e1n\u00ed zranitelnost\u00ed<\/p>\n<p><\/p>\n<p>T\u00e9ma \u010d. 11: Monitoring<br \/>\n\u2014 Definice SLA, SLO, Error Budget a jin\u00e9 stra\u0161ideln\u00e9 term\u00edny ze sv\u011bta SRE<br \/>\n\u2014 SRE: Praxe monitorov\u00e1n\u00ed SLI a SLO<br \/>\n\u2014 SRE: Praxe vyu\u017eit\u00ed Error Budgetu<br \/>\n\u2014 SRE: \u0158\u00edzen\u00ed p\u0159eru\u0161en\u00ed a opera\u010dn\u00ed z\u00e1t\u011b\u017ee (apigateway, service mesh, circuit breakers)<br \/>\n\u2014 Monitoring pipeline a metriky v\u00fdvoje<\/p>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/southbridge\/blog\/455972\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>&lt;TL;DR&gt; \u0421\u043b\u0451\u0440\u043c \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0432\u043e\u0439\u0442\u0438 \u0432 \u0442\u0435\u043c\u0443 Kubernetes \u0438\u043b\u0438 \u043f\u043e\u0434\u0442\u044f\u043d\u0443\u0442\u044c \u0441\u0432\u043e\u0438 \u0437\u043d\u0430\u043d\u0438\u044f. \u0423\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u0438 \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u044b. \u0422\u0435\u0445, \u043a\u0442\u043e \u043d\u0438\u0447\u0435\u0433\u043e \u043d\u043e\u0432\u043e\u0433\u043e \u043d\u0435 \u0443\u0437\u043d\u0430\u043b \u0438\u043b\u0438 \u043d\u0435 \u0440\u0435\u0448\u0438\u043b \u0441\u0432\u043e\u0438 \u0437\u0430\u0434\u0430\u0447\u0438, \u0441\u0447\u0438\u0442\u0430\u043d\u043d\u044b\u0435 \u0435\u0434\u0438\u043d\u0438\u0446\u044b. \u0411\u0435\u0437\u0443\u0441\u043b\u043e\u0432\u043d\u044b\u043c \u043c\u0430\u043d\u0438\u0431\u0435\u043a\u043e\u043c \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u0434\u043d\u044f (\u00ab\u0415\u0441\u043b\u0438 \u0432\u044b \u0447\u0443\u0432\u0441\u0442\u0432\u0443\u0435\u0442\u0435, \u0447\u0442\u043e \u0421\u043b\u0451\u0440\u043c \u0432\u0430\u043c \u043d\u0435 \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442, \u043c\u044b \u0432\u0435\u0440\u043d\u0435\u043c \u043f\u043e\u043b\u043d\u0443\u044e \u0446\u0435\u043d\u0443 \u0431\u0438\u043b\u0435\u0442\u0430\u00bb) \u0432\u043e\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0441\u044f \u0432\u0441\u0435\u0433\u043e \u043e\u0434\u0438\u043d \u0447\u0435\u043b\u043e\u0432\u0435\u043a, \u043e\u0431\u043e\u0441\u043d\u043e\u0432\u0430\u0432 \u0442\u0435\u043c, \u0447\u0442\u043e \u043f\u0435\u0440\u0435\u043e\u0446\u0435\u043d\u0438\u043b \u0441\u0432\u043e\u0438 \u0441\u0438\u043b\u044b. \u0421\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26516,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-35323","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043b\u0451\u0440\u043c.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri 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