{"id":33123,"date":"2019-10-31T21:50:52","date_gmt":"2019-10-31T18:50:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/terraformer-infrastructure-to-code\/"},"modified":"2019-10-31T21:50:52","modified_gmt":"2019-10-31T18:50:52","slug":"terraformer-infrastructure-to-code","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/terraformer-infrastructure-to-code","title":{"rendered":"Terraformer \u2014 Infrastructure To Code","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Terraformer \u2014 Infrastructure To Code\" src=\"\/wp-content\/uploads\/2019\/05\/d97414f6b4608dbb4ec7f582b7001773.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nChcel by som sa podeli\u0165 o nov\u00fd CLI n\u00e1stroj, ktor\u00fd som nap\u00edsal na rie\u0161enie star\u00e9ho probl\u00e9mu. <\/p>\n<h3>Probl\u00e9m<\/h3>\n<p>\nTerraform sa u\u017e d\u00e1vno stal \u0161tandardom v DevOps\/Cloud\/IT komunite. Je to ve\u013emi u\u017eito\u010dn\u00fd a praktick\u00fd n\u00e1stroj na spr\u00e1vu infra\u0161trukt\u00fary ako k\u00f3du. Existuje mnoho v\u00fdhod, ale aj mno\u017estvo \u00faskal\u00ed, ostr\u00fdch no\u017eov a pasc\u00ed. <br \/>\nS Terraformom je ve\u013emi jednoduch\u00e9 vytv\u00e1ra\u0165 nov\u00e9 veci a potom ich spravova\u0165, meni\u0165 alebo odstra\u0148ova\u0165. Ale \u010do robi\u0165 s t\u00fdmi, ktor\u00ed maj\u00fa obrovsk\u00fa infra\u0161trukt\u00faru v cloude, ktor\u00fa nezalo\u017eili pomocou Terraformu? Prepisova\u0165 a znovu vytv\u00e1ra\u0165 cel\u00e9 cloudov\u00e9 prostredie je n\u00e1kladn\u00e9 a riskantn\u00e9. <br \/>\nStretol som sa s touto problematikou na dvoch r\u00f4znych zamestnaniach. Najjednoduch\u0161\u00ed pr\u00edklad je, ke\u010f chcete ma\u0165 v\u0161etko ulo\u017een\u00e9 v Gite vo forme Terraform s\u00faborov, a vy m\u00e1te 250+ bucketov. P\u00edsa\u0165 ich manu\u00e1lne pre Terraform je celkom ve\u013ea. <br \/>\nExistuje <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/hashicorp\/terraform\/issues\/581\">issue<\/a><\/noindex> U\u017e od roku 2014 existoval terrafom, ktor\u00fd bol uzavret\u00fd v roku 2016 s n\u00e1dejou, \u017ee sa objav\u00ed import.<\/p>\n<p>V skratke, v\u0161etko vyzer\u00e1 ako na obr\u00e1zku, len sprava do\u013eava.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p>Upozornenie: Autor \u017eije v\u00e4\u010d\u0161inu svojho \u017eivota mimo Ruska a m\u00e1lo p\u00ed\u0161e v ru\u0161tine. Bu\u010fte opatrn\u00ed na pravopisn\u00e9 chyby.<\/p>\n<h3>Rie\u0161enia<\/h3>\n<p>\n1. Existuj\u00fa hotov\u00e9 a star\u00e9 rie\u0161enia pre AWS. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dtan4\/terraforming\">terraforming<\/a><\/noindex>. Ke\u010f som sa sna\u017eil z\u00edska\u0165 svojich 250+ bucketov, zistil som, \u017ee situ\u00e1cia je katastrof\u00e1lna. AWS u\u017e d\u00e1vno pridal mno\u017estvo nov\u00fdch mo\u017enost\u00ed, o ktor\u00fdch terraforming nevie, navy\u0161e je na Ruby. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dtan4\/terraforming\/blob\/master\/lib\/terraforming\/template\/tf\/s3.erb\">\u0160abl\u00f3ny vyzeraj\u00fa chudobne.<\/a><\/noindex>. Po 2 hodin\u00e1ch ve\u010der som poslal <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/dtan4\/terraforming\/pull\/396\">Pull request<\/a><\/noindex> na pridanie \u010fal\u0161\u00edch funkci\u00ed a uvedomil som si, \u017ee tak\u00e9to rie\u0161enie v\u00f4bec nevyhovuje. <br \/>\nAko funguje terraforming: berie d\u00e1ta z AWS SDK a generuje tf a tfstate cez \u0161abl\u00f3ny. <br \/>\nS\u00fa tu tri probl\u00e9my:<br \/>\n1. V\u017edy tam bude zaka\u017ed\u00fdm me\u0161kanie v aktualiz\u00e1ci\u00e1ch.<br \/>\n2. tf s\u00fabory ob\u010das vych\u00e1dzaj\u00fa po\u0161koden\u00e9. <br \/>\n3. tfstate sa zostavuje oddelene od tf a nie v\u017edy sa zhoduje.<br \/>\nSkuto\u010dne je \u0165a\u017ek\u00e9 dosiahnu\u0165 v\u00fdsledok, pri ktorom `terraform plan` povie, \u017ee nie s\u00fa \u017eiadne zmeny.<\/p>\n<p>2. `terraform import` \u2014 zabudovan\u00e1 funkcia v Terraform. Ako to funguje? <br \/>\nNap\u00ed\u0161ete pr\u00e1zdny TF s\u00fabor s menom a typom zdroja, potom spust\u00edte `terraform import` a zad\u00e1te ID zdroja. Terraform sa obracia na poskytovate\u013ea, z\u00edska d\u00e1ta a vytvor\u00ed tfstate s\u00fabor. <br \/>\nS\u00fa tu tri probl\u00e9my:<br \/>\n1. Z\u00edskame len tfstate s\u00fabor, zatia\u013e \u010do tf je pr\u00e1zdny a mus\u00ed sa nap\u00edsa\u0165 alebo konvertova\u0165 z tfstate.<br \/>\n2. Funguje len s jedn\u00fdm zdrojom naraz a nepodporuje v\u0161etky zdroje. A \u010do m\u00e1m robi\u0165 s 250+ bucketmi?<br \/>\n3. Mus\u00edte pozna\u0165 ID zdrojov \u2014 to znamen\u00e1, \u017ee to mus\u00edte obali\u0165 do k\u00f3du, ktor\u00fd z\u00edska zoznam zdrojov.<br \/>\nV skuto\u010dnosti je v\u00fdsledok \u010diasto\u010dn\u00fd a nie je dobre \u0161k\u00e1lovate\u013en\u00fd.<\/p>\n<h3>Moje rie\u0161enie<br \/>\n<\/h3>\n<p>Po\u017eiadavky:<br \/>\n1. Mo\u017enos\u0165 vytvori\u0165 s\u00fabory tf a tfstate na z\u00e1klade zdrojov. Napr\u00edklad stiahnu\u0165 v\u0161etky bucket\/?\/security group\/?\/load balancer a \u010do `terraform plan` vracia, \u017ee nie s\u00fa \u017eiadne zmeny.<br \/>\n2. Potrebujeme 2 cloudu GCP + AWS.<br \/>\n3. Glob\u00e1lne rie\u0161enie, ktor\u00e9 sa d\u00e1 \u013eahko aktualizova\u0165 zaka\u017ed\u00fdm a nemus\u00edte na ka\u017ed\u00fd zdroj str\u00e1vi\u0165 3 dni pr\u00e1ce.<br \/>\n4. Urobi\u0165 to open source \u2013 to je probl\u00e9m v\u0161etk\u00fdch.<\/p>\n<p>Jazyk Go \u2013 preto ho m\u00e1m r\u00e1d, a existuje v \u0148om kni\u017enica na vytv\u00e1ranie HCL s\u00faborov, ktor\u00e1 sa pou\u017e\u00edva v terraform + mno\u017estvo k\u00f3du v terraform, ktor\u00fd m\u00f4\u017ee by\u0165 u\u017eito\u010dn\u00fd.<\/p>\n<h3>Cesta.<\/h3>\n<p>\nPrv\u00fd pokus.<br \/>\nZa\u010dal som jednoduchou verziou. Spojenie s cloudom cez SDK za potrebn\u00fdm zdrojom a jeho konverzia do pol\u00ed pre terraform. Pokus zomrel hne\u010f na security group, preto\u017ee sa mi nep\u00e1\u010dilo 1,5 d\u0148a konvertova\u0165 iba security group (zdrojov je ve\u013ea). Dlho a potom sa pol\u00ed m\u00f4\u017eu meni\u0165\/prid\u00e1va\u0165.<\/p>\n<p>Druh\u00fd pokus.<br \/>\nZalo\u017een\u00e9 na n\u00e1pade op\u00edsanom. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/hashicorp\/terraform\/issues\/15608\">tu<\/a><\/noindex>Proste vzia\u0165 a skonvertova\u0165 tfstate na tf. V\u0161etky \u00fadaje s\u00fa tam a polia s\u00fa rovnak\u00e9. Ako z\u00edska\u0165 pln\u00fd tfstate pre viac zdrojov? Tu prich\u00e1dza pomoc s pr\u00edkazom `terraform refresh`. Terraform vezme v\u0161etky zdroje v tfstate a pod\u013ea ID z\u00edska \u00fadaje a zap\u00ed\u0161e v\u0161etko do tfstate. Teda vytvori\u0165 pr\u00e1zdny tfstate len s n\u00e1zvami a ID, spusti\u0165 `terraform refresh` a z\u00edskame pln\u00e9 tfstate. Hur\u00e1!<br \/>\nTeraz sa pust\u00edme do recurs\u00edvneho p\u00edsania konvertora pre tfstate na tf. Pre t\u00fdch, ktor\u00ed nikdy ne\u010d\u00edtali tfstate, je to JSON, ale \u0161peci\u00e1lny. <br \/>\nTu je jeho d\u00f4le\u017eit\u00e1 \u010das\u0165 attributes.<\/p>\n<pre><code class=\"javascript\"> \"attributes\": {\n                            \"id\": \"default\/backend-logging-load-deployment\",\n                            \"metadata.#\": \"1\",\n                            \"metadata.0.annotations.%\": \"0\",\n                            \"metadata.0.generate_name\": \"\",\n                            \"metadata.0.generation\": \"24\",\n                            \"metadata.0.labels.%\": \"1\",\n                            \"metadata.0.labels.app\": \"backend-logging\",\n                            \"metadata.0.name\": \"backend-logging-load-deployment\",\n                            \"metadata.0.namespace\": \"default\",\n                            \"metadata.0.resource_version\": \"109317427\",\n                            \"metadata.0.self_link\": \"\/apis\/apps\/v1\/namespaces\/default\/deployments\/backend-logging-load-deployment\",\n                            \"metadata.0.uid\": \"300ecda1-4138-11e9-9d5d-42010a8400b5\",\n                            \"spec.#\": \"1\",\n                            \"spec.0.min_ready_seconds\": \"0\",\n                            \"spec.0.paused\": \"false\",\n                            \"spec.0.progress_deadline_seconds\": \"600\",\n                            \"spec.0.replicas\": \"1\",\n                            \"spec.0.revision_history_limit\": \"10\",\n                            \"spec.0.selector.#\": \"1\",\n<\/code><\/pre>\n<p>\nTu s\u00fa:<br \/>\n1. id \u2013 string.<br \/>\n2. metadata \u2013 pole ve\u013ekosti 1 a v \u0148om objekt s po\u013eami, ktor\u00fd je pop\u00edsan\u00fd ni\u017e\u0161ie.<br \/>\n3. spec \u2013 hash ve\u013ekosti 1 a v \u0148om key,value.<br \/>\nSkr\u00e1tka z\u00e1bavn\u00fd form\u00e1t, v\u0161etko m\u00f4\u017ee by\u0165 aj do h\u013abky na nieko\u013eko \u00farovn\u00ed.<\/p>\n<pre><code class=\"javascript\">                   \"spec.#\": \"1\",\n                            \"spec.0.min_ready_seconds\": \"0\",\n                            \"spec.0.paused\": \"false\",\n                            \"spec.0.progress_deadline_seconds\": \"600\",\n                            \"spec.0.replicas\": \"1\",\n                            \"spec.0.revision_history_limit\": \"10\",\n                            \"spec.0.selector.#\": \"1\",\n                            \"spec.0.selector.0.match_expressions.#\": \"0\",\n                            \"spec.0.selector.0.match_labels.%\": \"1\",\n                            \"spec.0.selector.0.match_labels.app\": \"backend-logging-load\",\n                            \"spec.0.strategy.#\": \"0\",\n                            \"spec.0.template.#\": \"1\",\n                            \"spec.0.template.0.metadata.#\": \"1\",\n                            \"spec.0.template.0.metadata.0.annotations.%\": \"0\",\n                            \"spec.0.template.0.metadata.0.generate_name\": \"\",\n                            \"spec.0.template.0.metadata.0.generation\": \"0\",\n                            \"spec.0.template.0.metadata.0.labels.%\": \"1\",\n                            \"spec.0.template.0.metadata.0.labels.app\": \"backend-logging-load\",\n                            \"spec.0.template.0.metadata.0.name\": \"\",\n                            \"spec.0.template.0.metadata.0.namespace\": \"\",\n                            \"spec.0.template.0.metadata.0.resource_version\": \"\",\n                            \"spec.0.template.0.metadata.0.self_link\": \"\",\n                            \"spec.0.template.0.metadata.0.uid\": \"\",\n                            \"spec.0.template.0.spec.#\": \"1\",\n                            \"spec.0.template.0.spec.0.active_deadline_seconds\": \"0\",\n                            \"spec.0.template.0.spec.0.container.#\": \"1\",\n                            \"spec.0.template.0.spec.0.container.0.args.#\": \"3\",<\/code><\/pre>\n<p>\nV z\u00e1sade, kto chce \u00falohu na programovanie na pohovor, m\u00f4\u017ee jednoducho po\u017eiada\u0165, aby nap\u00edsal parser na toto \ud83d\ude42<br \/>\nPo dlh\u00fdch pokusoch nap\u00edsa\u0165 parser bez ch\u00fdb, som na\u0161iel \u010das\u0165 jeho k\u00f3du v terraform-e, a to t\u00fa najd\u00f4le\u017eitej\u0161iu \u010das\u0165. A v\u0161etko fungovalo celkom norm\u00e1lne.<\/p>\n<p>Pok\u00fas \u010d\u00edslo tri<br \/>\nTerraform provider \u2014 s\u00fa to bin\u00e1rky, v ktor\u00fdch je k\u00f3d so v\u0161etk\u00fdmi zdrojmi a logikou pre pr\u00e1cu s API cloudov. Ka\u017ed\u00fd cloud m\u00e1 svoj vlastn\u00fd provider a samotn\u00fd terraform ich vol\u00e1 cez svoj protokol RPC medzi dvoma procesmi.<br \/>\nTeraz som sa rozhodol pristupova\u0165 priamo k terraform providerom cez RPC volania. Takto to vyzeralo pekne a umo\u017enilo to meni\u0165 terraform providery na nov\u0161ie a z\u00edska\u0165 nov\u00e9 mo\u017enosti bez zmeny k\u00f3du. E\u0161te sa uk\u00e1zalo, \u017ee nie v\u0161etky polia v tfstate musia by\u0165 v tf, ale ako to zisti\u0165? Iba sa op\u00fdta\u0165 provider na to. Potom za\u010dala \u010fal\u0161ia rekurs\u00edvna pornografia so zostavovan\u00edm regul\u00e1rnych v\u00fdrazov s h\u013eadan\u00edm pol\u00ed v tfstate na v\u0161etk\u00fdch \u00farovniach.<\/p>\n<p>Nakoniec sa z toho stal u\u017eito\u010dn\u00fd CLI n\u00e1stroj, ktor\u00fd m\u00e1 spolo\u010dn\u00fa infra\u0161trukt\u00faru pre v\u0161etky terraform providery, a nov\u00fd sa d\u00e1 jednoducho prida\u0165. Taktie\u017e prid\u00e1vanie zdrojov zaber\u00e1 m\u00e1lo k\u00f3du. Plus r\u00f4zne v\u00fdhody, ako spojenie medzi zdrojmi. Samozrejme, bolo ve\u013ea r\u00f4znych probl\u00e9mov, ktor\u00e9 sa nedaj\u00fa v\u0161etky op\u00edsa\u0165.<br \/>\nNazval som tento projekt Terrafomer. <\/p>\n<h3>Fin\u00e1le<\/h3>\n<p>\nS pomocou Terrafomer sme vygenerovali 500-700 tis\u00edc riadkov k\u00f3du tf + tfstate z dvoch cloudov. Podarilo sa n\u00e1m vzia\u0165 legacy veci a za\u010da\u0165 ich manipulova\u0165 iba cez terraform, ako v najlep\u0161\u00edch n\u00e1padoch infrastructure as code. Je to jednoducho m\u00e1gia, ke\u010f zoberiete obrovsk\u00fd cloud a z\u00edskate ho prostredn\u00edctvom pr\u00edkazu vo forme funguj\u00facich terraform s\u00faborov. A potom grep\/replace\/git a tak \u010falej.<\/p>\n<p>Opravil a usporiadal som, z\u00edskal povolenia. Publikoval na GitHub pre v\u0161etk\u00fdch vo \u0161tvrtok (02.05.19). <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/GoogleCloudPlatform\/terraformer\">github.com\/GoogleCloudPlatform\/terraformer<\/a><\/noindex><br \/>\nU\u017e z\u00edskal 600 hviezd, 2 pull requesty na pridanie podpory pre openstack a kubernetes. Dobr\u00e9 recenzie. V\u0161etko je to u\u017eito\u010dn\u00fd projekt pre \u013eud\u00ed.<br \/>\nOdpor\u00fa\u010dam v\u0161etk\u00fdm, ktor\u00ed chc\u00fa za\u010da\u0165 pracova\u0165 s Terraform a nemusia v\u0161etko prepisova\u0165. <br \/>\nBudem r\u00e1d za pull requesty, probl\u00e9my, hviezdy.<\/p>\n<p>Demo<br \/>\n<noindex><img decoding=\"async\" alt=\"Terraformer \u2014 Infrastructure To Code\" src=\"\/wp-content\/uploads\/2019\/05\/76f10055b9106590f72c4e22e4d4e6d5.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/noindex><br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450410\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0425\u043e\u0442\u0435\u043b \u0431\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c \u043f\u0440\u043e \u043d\u043e\u0432\u044b\u0439 CLI tool \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u044f \u043d\u0430\u043f\u0438\u0441\u0430\u043b \u0434\u043b\u044f \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043e\u0434\u043d\u043e\u0439 \u0441\u0442\u0430\u0440\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 Terraform \u0443\u0436\u0435 \u0434\u0430\u0432\u043d\u043e \u0441\u0442\u0430\u043b \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u043c \u0432 Devops\/Cloud\/IT \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0435. \u0412\u0435\u0449\u044c \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u043e\u0431\u043d\u0430\u044f \u0438 \u043f\u043e\u043b\u0435\u0437\u043d\u0430\u044f \u0447\u0442\u043e\u0431 \u0437\u0430\u043d\u0438\u043c\u0430\u0442\u0441\u044f infrastructure as code. \u0415\u0441\u0442\u044c \u043c\u043d\u043e\u0433\u043e \u043f\u0440\u0435\u043b\u0435\u0441\u0442\u0435\u0439 \u0432 Terraform \u0430 \u0442\u0430\u043a \u0436\u0435 \u043c\u043d\u043e\u0433\u043e \u0432\u0438\u043b\u043e\u043a, \u043e\u0441\u0442\u0440\u044b\u0445 \u043d\u043e\u0436\u0435\u0439 \u0438 \u0433\u0440\u0430\u0431\u043b\u0435\u0439. \u0421 Terraform \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u043e\u0431\u043d\u043e \u0434\u0435\u043b\u0430\u0442\u044c \u043d\u043e\u0432\u044b\u0435 \u0432\u0435\u0449\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":24869,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-33123","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0425\u043e\u0442\u0435\u043b \u0431\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c \u043f\u0440\u043e \u043d\u043e\u0432\u044b\u0439 CLI 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