This manual is for Cuirass version 1.2.0, a build automation server. Cuirass Introduction 1 Specifications 2 Notifications 2.1 Email 2.2 Mastodon 2.3 RSS 3 Badges 4 Parameters 5 Build modes 5.1 With the local Guix daemon 5.2 With the remote build mechanism. 6 Invocation 6.1 Invoking cuirass register 6.2 Invoking cuirass web 6.3 Invoking cuirass remote-server 6.4 Invoking cuirass remote-worker 7 Authentication 8 Web Interface 8.1 Evaluation information 8.2 Triggering an Evaluation 8.3 Build information 8.4 Build raw log output 8.5 Jobs 8.6 Jobs history 8.7 Dashboard registration 8.8 Latest builds 8.9 Queued builds 9 Database schema 9.1 Specifications 9.2 Checkouts 9.3 Evaluations 9.4 Jobs 9.5 Builds 9.6 BuildDependencies 9.7 Outputs 9.8 Metrics 9.9 BuildProducts 9.10 Notifications 9.11 Workers 9.12 Dashboards 10 Contributing Appendix A GNU Free Documentation License Concept Index Cuirass ******* Copyright © 2016, 2017 Mathieu Lirzin Copyright © 2017, 2020, 2021 Mathieu Othacehe Copyright © 2018, 2021, 2023 Ludovic Courtès Copyright © 2018 Clément Lassieur Copyright © 2023 Maxim Cournoyer Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”. Introduction ************ “Cuirass” is a general-purpose build automation server that checks out source files from VCS (Version Control System) repositories, executes build jobs, and stores build results in a database. It provides a web interface to monitor the build results, as well as an HTTP API. Cuirass is also able to send build notifications using different mechanisms such as RSS and email. Cuirass is inspired by the Hydra (https://nixos.org/hydra/) continuous build system. Unlike Hydra, it is built on top of the GNU Guix (https://www.gnu.org/software/guix/) functional package manager. The goal of Cuirass is to prevent software regressions by building a set of package definitions, system images and running periodical tests for various architectures. Cuirass is also responsible for GNU Guix binary substitutes production (*note Substitutes: (guix)Substitutes.). Cuirass is deployed on the GNU Guix build farm at . It is also common for Guix users to run their own Cuirass instance to build different sources, using different priorities (*note Continuous Integration: (guix)Continuous Integration.). 1 Specifications **************** The main Cuirass argument is the SPECIFICATION file. It describes the repositories that must be used, the build jobs and their priorities between other things. -- Data Type: specification ‘name’ The specification name as a Scheme symbol. ‘build’ (default: ‘all’) The packages to be built by Cuirass. It defaults to ‘all’, which means that all the discovered packages in the subsequent ‘channels’ field are to be selected. It is also possible to set this field to: • ‘core’ Build only the core packages such as ‘gcc’, ‘guile’ and ‘glibc’. • ‘guix’ Build only the Guix modules that are involved in the ‘guix pull’ command. • ‘hello’ Build only the hello package. • ‘images’ Build only the Guix System images. • ‘system-tests’ Build only the Guix System tests. • ‘tarball’ Build only the Guix binary tarball. • ‘(custom . list)’ Build only the jobs returned by the ‘cuirass-jobs’ procedure of each module in ‘list’. • ‘(channels . list)’ Build only the packages that are part of the given channel ‘list’. For instance, ‘(channels my-channel)’ will only build the packages that are part of ‘my-channel’ channel. • ‘(packages . list)’ Build only the specified packages in ‘list’. For instance, ‘(packages "strace" "perf")’ will only build the packages ‘strace’ and ‘perf’. • ‘(manifests . list)’ Build only the packages that are part of the manifests ‘list’. For instance, ‘(manifests "etc/manifest")’ will only build the packages that are part of the ‘etc/manifest’ file. This file must be provided by exactly one of the channels defined below. ‘channels’ (default: ‘(list %default-guix-channel)’) The channels to be fetched by Cuirass (*note Channels: (guix)Channels.). ‘build-outputs’ (default: ‘()’) The build artifacts that must be saved and proposed to download in the web interface as a list of ‘build-outputs’ records. -- Data Type: build-output ‘job’ Save the build outputs of the build jobs which names match the ‘job’ regexp. ‘type’ The build output type as a string. It is only used to describe the build output in the web interface. ‘output’ (default: ‘("out")’) The job output if it has multiple outputs (*note Packages with Multiple Outputs: (guix)Packages with Multiple Outputs.). ‘path’ The build output path within the job, as a string. For instance, let’s consider the ‘binary-tarball.x86_64-linux’ job which produces the following output: ‘/gnu/store/xxx-guix-binary.tar.xz’. The build output definition below will save the root element (‘""’) of the ‘"out"’ output of the ‘"binary-tarball.x86_64-linux"’ job—i.e., the ‘"xxx-guix-binary.tar.xz"’ file. (build-output (job "binary-tarball*") (type "archive") (output "out") (path "")) ‘notifications’ (default: ‘()’) The list of build notifications that must be sent. For instance: (list (email (from "build@cuirass.org") (to "notification@myself.org") (server "sendmail:///etc/my-mailer.sh"))) will send build notifications emails from ‘build@cuirass.org’ to ‘notifications@myself.org’, using ‘"sendmail:///etc/my-mailer.sh"’ mailer. The different notification types are described in the *note Notifications:: section. ‘period’ (default: ‘0’) When ‘period’ is strictly superior to zero new evaluations will only be triggered if the latest evaluation occured more than ‘period’ seconds ago. Otherwise, the specification will be evaluated for each new commit in the declared ‘channels’. ‘priority’ (default: ‘9’) The specification priority relatively to the other specifications, as an integer ranging from 0 to 9 where 0 is the higher priority and 9 the lowest. ‘systems’ (default: ‘(list (%current-system))’) Build every job for each system in this list. By default only the current system is selected. 2 Notifications *************** Cuirass supports different build notifications types, that can be passed in the ‘notifications’ field of the specification record, see *note Specifications::. Cuirass sends build notifications each time a build is broken or fixed. 2.1 Email ========= Email build notifications can be enabled using the following record. -- Data Type: email ‘from’ The email ‘From’ field, as a string. ‘to’ The email ‘To’ field, as a string. ‘server’ The mail server connection string. Cuirass uses the ‘mailutils’ package. Hence the server can be specified as a remote SMTP mailbox (*note SMTP Mailboxes: (mailutils)SMTP Mailboxes.) or as a program mailbox (*note Program Mailboxes: (mailutils)Program Mailboxes.). 2.2 Mastodon ============ Mastodon build notifications can be enabled using the following record. -- Data Type: mastodon The Mastodon credentials must be defined as Cuirass parameters, see *note Parameters::. 2.3 RSS ======= Cuirass is proposing a build notification RSS feed at the following URL: • ‘http://cuirass-url/events/rss[?specification=spec]’ By default build notifications are sent for all specifications. If the ‘specification’ argument is passed, they can be restricted to the SPEC specification. 3 Badges ******** Cuirass is able to generate SVG badges that can be integrated inside your favorite forge. • ‘http://cuirass-url/jobset/spec/badge.svg?type=0’ Generates a badge for the ‘spec’ specification. If no evaluation could be found for the ‘spec’ specification, an ‘error’ badge is generated. Multiple badge types are supported through the ‘type’ parameter. ‘0’ The default type. The badge represents the percentage of successful jobs for the latest evaluation of the ‘spec’ specification. ‘1’ The badge represents the specification name as well as the percentage of successful jobs for the latest evaluation of the ‘spec’ specification. 4 Parameters ************ Cuirass is able to connect to different external services such as ‘postgresql’ for the database, ‘zabbix’ for machine monitoring and ‘mastodon’ for build notifications. As those services often require using secret credentials, Cuirass can be passed a parameter file. The parameters file can be passed using the ‘parameters’ command line argument, see *note Invocation::. Here’s an example parameter file: (%cuirass-url "https://ci.guix.gnu.org") (%zabbix-url "http://127.0.0.1:15412/api_jsonrpc.php") (%mastodon-instance-name "My Instance") (%mastodon-instance-url "https://instance.org") (%mastodon-instance-token "secret-token") -- Parameters: parameters ‘%cuirass-database’ (default: ‘"cuirass"’) The Cuirass PostgreSQL database name. ‘%cuirass-host’ (default: ‘"/var/run/postgresql"’) The Cuirass PostgreSQL database host. ‘%cuirass-url’ (default: ‘#f’) The URL of the Cuirass web server. This is useful to send absolute links within notifications. ‘%zabbix-url’ (default: ‘#f’) The URL of the Zabbix monitoring server providing the workers status, if supported. ‘%zabbix-user’ (default: ‘"Admin"’) The user for Zabbix API authentication. ‘%zabbix-password’ (default: ‘"zabbix"’) The password for Zabbix API authentication. ‘%mastodon-instance-name’ (default: ‘#f’) The name of the Mastodon instance used to send build notifications. ‘%mastodon-instance-url’ (default: ‘#f’) The URL of the Mastodon instance. ‘%mastodon-instance-token’ (default: ‘#f’) The token used to authenticate on the Mastodon instance. 5 Build modes ************* Cuirass supports two mechanisms to build derivations. 5.1 With the local Guix daemon ============================== This is the default build mechanism. Once the build jobs are evaluated, they are sent to the local Guix daemon. Cuirass then listens to the Guix daemon output to detect the various build events. While this mode doesn’t require any particular configuration, it doesn’t scale well. The scheduling decisions of the Guix daemon are opaque and often suboptimal. When Cuirass is used to build a large amount of jobs, the remote build mechanism described below should be preferred. 5.2 With the remote build mechanism. ==================================== This mode is harder to setup but scales way better. This is the build mode that is used on the GNU Guix build farm at . The build jobs are not submitted to the local Guix daemon. Instead, a remote server dispatches build requests to the connect remote workers, according to the build priorities. The remote server and the connected workers communicate using ZMQ over TCP. The workers are able to discover the remote server using Avahi. The built items are exchanged as substitutes (*note Substitutes: (guix)Substitutes.) by spawning Guix publish servers both on the remote server and on each connected remote worker. It can be enabled this way: • Start the ‘cuirass register’ process with the ‘build-remote’ command line argument, see *note Invocation::. This way, the registration process does not submit the new build jobs to the local Guix daemon. • Start the ‘cuirass remote-server’ process to dispatch the build jobs to the connected workers. • Start at least one ‘cuirass remote-worker’ process on any machine of the local network to actually perform the builds and report their status. Note that some Cuirass features are only available when using this build mode. That’s the case for: • The build priority support. • The notification mechanism, see *note Notifications::. • The transmission of ‘timeout’ and ‘max-silent-time’ package properties to the Guix daemon. • The live build log mechanism of the Web interface. • The workers status page of the Web inferface accessible at ‘http://cuirass-url/workers’. The easiest way to setup such an infrastructure is to rely on the GNU Guix Cuirass services definitions (*note Continuous Integration: (guix)Continuous Integration.). Alternatively, there is a systemd service unit file installed at ‘$CUIRASS_PREFIX/lib/systemd/system/cuirass-remote-worker.service’ to launch the ‘cuirass remote-worker’ on systems which use systemd. It can be installed and enabled as follows: sudo install -o root -g root -m 644 \ $CUIRASS_PREFIX/lib/systemd/system/cuirass-remote-worker.service \ /etc/systemd/system sudo systemctl enable cuirass-remote-worker.service sudo systemctl start cuirass-remote-worker.service 6 Invocation ************ 6.1 Invoking cuirass register ============================= The usual way to invoke ‘cuirass’ registration process is as follows: cuirass register --specifications SPECS This starts a Cuirass registration instance building SPECS and storing the results using the default PostgreSQL database. Additionally the following options can be used. ‘--one-shot’ Instead of executing ‘cuirass’ as a daemon looping over the jobs. Only evaluate and build the specifications once. ‘--cache-directory=DIRECTORY’ DIRECTORY is the place where the VCS repositories used by the jobs are stored. ‘--specifications=SPECIFICATIONS-FILE’ ‘-S SPECIFICATIONS-FILE’ Add the specifications defined in SPECIFICATIONS-FILE in the job database before launching the evaluation and build processes. ‘--database=DATABASE’ ‘-D DATABASE’ Use DATABASE as the database containing the jobs and the past build results. Since Cuirass uses PostgreSQL as a database engine, DATABASE must be a string such as ‘"dbname=cuirass host=localhost"’. By default, Cuirass uses the following connection string: ‘dbname=cuirass host=/var/run/postgresql"’. ‘--build-remote’ Use the “remote build mechanism”, whereby build distribution is handled by a separate ‘cuirass remote-server’ process (see below). This option can increase throughput and resilience when distributing builds to a large number of build machines. When this option is omitted, builds are started using the “normal” Guix way, by asking ‘guix-daemon’ to build them. ‘--parameters=PARAMETERS-FILE’ ‘-P PARAMETERS-FILE’ Read parameters from the given PARAMETERS-FILE. The supported parameters are described here (*note Parameters::). ‘--ttl=DURATION’ Cuirass registers build results as garbage collector (GC) roots, thereby preventing them from being deleted by the GC. The ‘--ttl’ option instructs it to keep those GC roots live for at least DURATION—e.g., ‘1m’ for one month, ‘2w’ for two weeks, and so on. The default is 30 days. Those GC roots are typically stored in ‘/var/guix/gcroots/profiles/per-user/USER/cuirass’, where USER is the user under which Cuirass is running. ‘--interval=N’ ‘-I N’ Wait at most N seconds between each poll. Note: We recommend notifying Cuirass when it should evaluate a jobset—e.g., because new code has been pushed to a channel’s Git repository—and passing a high value of N like ‘3600’ (an hour): this will reduce network traffic as Cuirass will update its local checkouts only when needed, plus every N seconds “just in case”. To trigger a jobset evaluation, issue an HTTP ‘GET’ request, for example with a command along these lines: wget --post-data="" -O /dev/null \ https://cuirass.example.org/jobset/JOBSET/hook/evaluate You would typically run that command as a “push hook” on the servers that host the Git repositories relevant to JOBSET. Our course, you may only do this for repositories you control. For other repositories, periodic polling in unavoidable. ‘--threads=N’ Use up to N kernel threads. N should be lower than or equal to the number of CPU cores on the machine. In general though, having a large N is not very useful since the work of Cuirass is primarily I/O-bound—on the contrary, large values of N may increase overhead. The default value should be appropriate for most cases. ‘--version’ ‘-V’ Display the actual version of ‘cuirass’. ‘--help’ ‘-h’ Display an help message that summarize all the options provided. 6.2 Invoking cuirass web ======================== The usual way to invoke the ‘cuirass’ web server is as follows: cuirass web This starts a Cuirass web server on the default port. Additionally the following options can be used. ‘--database=DATABASE’ ‘-D DATABASE’ Use DATABASE as the database containing the jobs and the past build results. Since Cuirass uses PostgreSQL as a database engine, DATABASE must be a string such as ‘"dbname=cuirass host=localhost"’. By default, Cuirass uses the following connection string: ‘dbname=cuirass host=/var/run/postgresql"’. ‘--parameters=PARAMETERS-FILE’ ‘-P PARAMETERS-FILE’ Read parameters from the given PARAMETERS-FILE. The supported parameters are described here (*note Parameters::). ‘--port=NUM’ ‘-p NUM’ Make the HTTP interface listen on port NUM. Use port 8080 by default. ‘--listen=HOST’ Make the HTTP interface listen on network interface for HOST. Use localhost by default. ‘--version’ ‘-V’ Display the actual version of ‘cuirass’. ‘--help’ ‘-h’ Display an help message that summarize all the options provided. 6.3 Invoking cuirass remote-server ================================== The ‘remote-server’ command starts a daemon that is able to communicate with ‘remote-worker’ processes; it is used in conjunction with ‘cuirass register --build-remote’ (see above). Its role is to answer build requests from the workers, by sending back derivations that must be built. On build completion it updates the database accordingly and possibly fetches build substitutes. The ‘remote-server’ and ‘remote-worker’ processes communicate using ZMQ over TCP. Additionally the following options can be used. ‘--backend-port=PORT’ The TCP port for communicating with ‘remote-worker’ processes using ZMQ. It defaults to ‘5555’. ‘--log-port=PORT’ The TCP port of the log server. It defaults to ‘5556’. ‘--publish-port=PORT’ The TCP port of the publish server. It defaults to ‘5557’. ‘--parameters=PARAMETERS-FILE’ ‘-P PARAMETERS-FILE’ Read parameters from the given PARAMETERS-FILE. The supported parameters are described here (*note Parameters::). ‘--database=DATABASE’ ‘-D DATABASE’ Use DATABASE PostgreSQL connection string. ‘--cache=DIRECTORY’ Use DIRECTORY to cache build log files. ‘--log-expiry=DURATION’ Periodically delete build logs older than DURATION, where ‘2m’ means “2 months”, ‘10d’ means “10 days”, and so on. The default duration is 6 months. ‘--trigger-substitute-url=URL’ Once a substitute is successfully fetched, trigger substitute baking at URL. ‘--user=USER’ Change privileges to USER as soon as possible—i.e., once the signing key has been read. ‘--no-publish’ Do not start a publish server and ignore the ‘publish-port’ argument. This can be useful if there is a standalone publish server standing next to the remote server. ‘--public-key=FILE’ ‘--private-key=FILE’ Use the specific FILEs as the public/private key pair used to sign the store items being published. ‘--version’ ‘-V’ Display the actual version of ‘cuirass’. ‘--help’ ‘-h’ Display an help message that summarize all the options provided. 6.4 Invoking cuirass remote-worker ================================== The ‘remote-worker’ command starts a daemon that is able to communicate with a ‘remote-server’ process. Its role is to request builds to the ‘remote-server’, perform them and report their status. The ‘remote-worker’ is able to discover a ‘remote-server’ process on the local network using Avahi and connect to it. Additionally the following options can be used. ‘--workers=COUNT’ Start COUNT parallel workers. It defaults to ‘1’. ‘--publish-port=PORT’ The TCP port of the publish server. It defaults to ‘5558’. ‘--server=IP-ADDRESS’ Do not use Avahi discovery and connect to the given ‘remote-server’ IP address. ‘--systems=SYSTEMS’ Only request builds for the given SYSTEMS. It defaults to ‘(list (%current-system))’. ‘substitute-urls (default: %default-substitute-urls)’ The list of URLs where to look for substitutes by default. ‘--public-key=FILE’ ‘--private-key=FILE’ Use the specific FILEs as the public/private key pair used to sign the store items being published. ‘--version’ ‘-V’ Display the actual version of ‘cuirass’. ‘--help’ ‘-h’ Display an help message that summarize all the options provided. 7 Authentication **************** Cuirass does not provide its own authentication mechanism; by default, any user can do anything via its web interface. To restrict this to only authorized users, one approach is to proxy the Cuirass web site via a web server such as Nginx and configure the web server to require client certificate verification for pages under the ‘/admin’ prefix. The following minimal Nginx configuration can be used to accomplish this on a Guix System: (service nginx-service-type (nginx-configuration (server-blocks (list ;; TLS is required for authentication; serve the site via ;; HTTPS only. (nginx-server-configuration (listen '("80")) (raw-content (list "return 308 https://$host$request_uri;"))) (nginx-server-configuration (listen '("443 ssl")) (server-name '("ci.your-host.org")) (ssl-certificate "/etc/certs/ci.your-host.org.crt") (ssl-certificate-key "/etc/certs/ci.your-host.org.key") (locations (list ;; Proxy the whole Cuirass web site... (nginx-location-configuration (uri "/") (body (list "proxy_pass http://localhost:8081;"))) ;; ... but require authentication for the admin pages. (nginx-location-configuration (uri "~ ^/admin") (body (list "if ($ssl_client_verify != SUCCESS) \ { return 403; } proxy_pass http://localhost:8081;"))))) (raw-content ;; Register your self-generated certificate authority. (list "ssl_client_certificate /etc/ssl-ca/certs/ca.crt;" "ssl_verify_client optional;"))))))) Your host TLS certificate could have been obtained via Let’s Encrypt or directly via the ‘openssl’ command, among other means. To create a private certificate authority (CA) that can sign user certificates, a convenience script is provided. It’s main requirement is to have the ‘guix’ command available. It can be invoked like: sudo -E ./etc/new-client-cert.scm --generate-ca It should generate the ‘/etc/ssl-ca/private/ca.key’ private key as well as the ‘/etc/ssl-ca/certs/ca.crt’ certificate authority as used in the Nginx configuration above. To issue a new user certificate, run the same script from your home directory with: sudo -E ./etc/new-client-cert.scm You will be asked to input the password for the CA private key, if any, and again for your new certificate; save it carefully. The script requires to run as root to have access to the private certificate authority key; it outputs the new user certificate files to the current working directory. After your new CA-signed user certificate is generated, it needs to be registered with your web browser. To do so using GNU IceCat, for example, you can navigate to ‘Parameters -> Security -> Show certificates’ and then click the ‘Import...’ button and select your ‘.pk12’ personal certificate file. The web interface of Cuirass should now only allow authenticated users to perform administrative tasks. 8 Web Interface *************** Cuirass has a web interface that one can navigate through a web browser, and it also has a programming interface: HTTP endpoints that can be queried to obtain a JSON representation of its state. This programming interface is inspired by that of Hydra, the continuous integration tool of the NixOS project. The sections below describe the available HTTP endpoints. As a user, note that there are at least two tools that can simplify access to this interface: the ‘emacs-build-farm’ (https://notabug.org/alezost/emacs-build-farm) package for Emacs, and the ‘(guix ci)’ client module from Guix. 8.1 Evaluation information ========================== Single evaluation ----------------- It is possible to query the Cuirass web server for evaluation information. The dedicated API is "/api/evaluation?id=EVAL-ID" where EVAL-ID is the unique id associated to the evaluation in database. For instance, querying a local Cuirass web server can be done with ‘curl’ and ‘jq’ to format the JSON response : $ curl -s "http://localhost:8080/api/evaluation?id=1" | jq { "id": 1, "specification": "master", "status": 0, "timestamp": 1615289011, "checkouttime": 1615289011, "evaltime": 1615289655, "checkouts": [ { "commit": "bd311f5a6ccbd4696ac77f0426a036bb375a2f10", "channel": "guix", "directory": "/gnu/store/6978xw9vs4ybg2pc3g736p1dba2056yl-guix-bd311f5" } ] } The nominal output is a JSON object whose fields are described hereafter. ‘id’ The unique build id. ‘specification’ The associated specification name, as a string. ‘status’ The evaluation status, as an integer. Possible values are : -1 -> started 0 -> succeeded 1 -> failed 2 -> aborted ‘checkouttime’ The timestamp after channel checkout. ‘evaltime’ The timestamp after evaluation completion. ‘checkouts’ The evaluation checkouts as a JSON object. Multiple evaluations -------------------- The latest evaluations list can be obtained with the API "/api/evaluations". The output is a JSON array of evaluations. Evaluations are represented as in the "/api/evaluation?id=EVAL-ID" API. This request accepts a mandatory parameter and an optional one. ‘nr’ Limit query result to nr elements. This parameter is _mandatory_. ‘spec’ Only consider evaluations that are part of the given ‘spec’ specification. 8.2 Triggering an Evaluation ============================ One can send an HTTP ‘POST’ request to trigger the evaluation of a jobset, along these lines: wget --post-data="" -O /dev/null \ https://cuirass.example.org/jobset/JOBSET/hook/evaluate A good idea is to do that from the post-push hook of the relevant Git repository. 8.3 Build information ===================== It is possible to query Cuirass web server for build informations. The dedicated API is "/build/BUILD-ID" where BUILD-ID is the unique id associated to the build in database. The build information can also be queried by output. For example, ‘/output/kg9mirg6xbvzcp0a98v7326n1nvvwgsj-hello-2.10’ will return the details of the output, along with the build if available. $ curl -s "http://localhost:8080/build/2" | jq { "id": 2, "jobset": "guix", "job": "acpica-20150410-job", "timestamp": 1501347493, "starttime": 1501347493, "stoptime": 1501347493, "buildoutputs": { "out": { "path": "/gnu/store/6g3njhfzqpdm335s7qhvmwvs5l7gcbq1-acpica-20150410" } }, "system": "x86_64-linux", "nixname": "acpica-20150410", "buildstatus": 0, "weather": 0, "busy": 0, "priority": 0, "finished": 1, "buildproducts": null } If requested BUILD-ID is not known, the HTTP code 404 is answered with a JSON error message. For example: $ curl -s "http://localhost:8080/build/fff" {"error" : "Build with ID fff doesn't exist."} The nominal output is a JSON object whose fields are described hereafter. ‘id’ The unique build id. ‘jobset’ The associated specification name, as a string. ‘job’ The associated job-name, as a string. ‘timestamp’ Timestamp taken at build creation time. ‘starttime’ Timestamp taken at build start time. ‘stoptime’ Timestamp taken at build stop time. ‘buildoutputs’ Build outputs as a JSON object. The keys names are referring to the eventual output names. The associated value is another JSON object which only key is ‘path’. ‘path’ value is the output directory in store as a string. ‘system’ System name of the build, as a string. ‘nixname’ Derivation name, as a string. ‘buildstatus’ Build status, as an integer. Possible values are : 0 -> succeeded 1 -> failed 2 -> failed dependency 3 -> failed other 4 -> cancelled ‘weather’ Build weather, as an integer. -1 -> unknown 0 -> new-success 1 -> new-failure 2 -> still-succeeding 3 -> still-failing ‘busy’ Whether the build is pending, as an integer. ‘priority’ Build priority, as an integer. ‘finished’ Build finished, as an integer. ‘buildproducts’ Build products in store as a JSON object. 8.4 Build raw log output ======================== It is possible to ask Cuirass for the raw build output log with the API "/build/BUILD-ID/log/raw" where BUILD-ID is the unique id associated to the build in database. The output is a raw text, for example: $ curl http://localhost:8080/build/2/log/raw starting phase `set-SOURCE-DATE-EPOCH' phase `set-SOURCE-DATE-EPOCH' succeeded after 0.0 seconds starting phase `set-paths' ... If requested BUILD-ID is not known, the HTTP code 404 is answered with a JSON error message. For example: $ curl -s "http://localhost:8080/build/fff/log/raw" {"error" : "Build with ID fff doesn't exist."} 8.5 Jobs ======== The list of jobs associated with a given evaluation can be obtained with the API "/api/jobs". The output is a JSON array of jobs. This request accepts a mandatory parameter and multiple optional ones. ‘evaluation’ The evaluation id. This parameter is _mandatory_. ‘names’ Filter query result to jobs which names are part of the given ‘names’ list, a comma separated list of job names. ‘system’ Filter query result to jobs with the given ‘system’. For example, to ask for the jobs of evaluation ‘12’ for ‘x86_64-linux’: $ curl "http://localhost:8080/api/jobs?evaluation=12&system=x86_64-linux" or the ‘emacs’ and ‘emacs-minimal’ jobs of evaluation ‘12’ for ‘x86_64-linux’: $ curl "http://localhost:8080/api/jobs?evaluation=12&names=emacs.x86_64-linux,emacs-minimal.x86_64-linux" The nominal output is a JSON object whose fields are described hereafter. ‘build’ The unique build id associated with the job. ‘status’ The build status, as an integer. ‘name’ The job name, as a string. 8.6 Jobs history ================ The history of jobs across the last evaluations of a given specification can be optained with the API "/api/jobs/history". This request accepts three mandatory parameters. ‘specification’ The specification name. This parameter is _mandatory_. ‘names’ Filter query result to jobs which names are part of the given ‘names’ list, a comma separated list of job names. This parameter is _mandatory_. ‘nr’ Limit query result to nr elements. This parameter is _mandatory_. For example, to ask for the history of ‘emacs.x86_64-linux’ and ‘emacs-minimal.x86_64-linux’ jobs of the ‘master’ specification over the last 10 evaluations: $ curl "http://localhost:8080/api/jobs/history?spec=master&names=emacs.x86_64-linux,emacs-minimal.x86_64-linux&nr=10" The nominal output is a JSON array which objects have the following field: ‘evaluation’ The unique evaluation id. ‘checkouts’ The evaluation checkouts as a JSON array. ‘name’ The jobs list for this evaluation, as a JSON array. 8.7 Dashboard registration ========================== The user can register a dashboard using the "/api/dashboard/register" API. This request accepts two mandatory parameters. ‘specification’ The specification name. This parameter is _mandatory_. ‘names’ The dashboard jobs names, where names is a comma separated list of job names. This parameter is _mandatory_. For example, to register a dashboard for the ‘emacs.x86_64-linux’ and ‘emacs-minimal.x86_64-linux’ jobs of the ‘master’ specification: $ curl "http://localhost:8080/api/dashboard/register?spec=master&names=emacs.x86_64-linux,emacs-minimal.x86_64-linux" The nominal output is a JSON object which contains a unique field: ‘id’ The registered dashboard id. The dashboard is then accessible at the following address: ‘http://localhost:8080/dashboard/’. 8.8 Latest builds ================= The list of latest builds can be obtained with the API "/api/latestbuilds". The output is a JSON array of builds. Builds are represented as in the "/build/BUILD-ID" API. This request accepts a mandatory parameter and multiple optional ones. ‘nr’ Limit query result to nr elements. This parameter is _mandatory_. ‘jobset’ Filter query result to builds with the given ‘jobset’. ‘job’ Filter query result to builds with the given ‘job’ name. ‘system’ Filter query result to builds with the given ‘system’. For example, to ask for the ten last builds: $ curl "http://localhost:8080/api/latestbuilds?nr=10" or the five last builds where jobset “guix”: $ curl "http://localhost:8080/api/latestbuilds?nr=5&jobset=guix" If no builds matching given parameters are found, an empty JSON array is returned. 8.9 Queued builds ================= The list of queued builds can be obtained with the API "/api/queue". The output is a JSON array of builds. Builds are represented as in the "/build/BUILD-ID" API. This request accepts a mandatory parameter. ‘nr’ Limit query result to nr elements. This parameter is _mandatory_. 9 Database schema ***************** Cuirass uses a PostgreSQL database to store information about jobs and past build results, but also to coordinate the execution of jobs. The database contains the following tables: ‘Specifications’, ‘Checkouts’, ‘Evaluations’, ‘Builds’, ‘Outputs’, ‘Metrics’, ‘BuildProducts’, ‘Events’ and ‘Workers’. The purpose of each of these tables is explained below. 9.1 Specifications ================== This table stores specifications describing the repositories from whence Cuirass fetches code and the environment in which it will be processed. Entries in this table must have values for the following text fields: ‘name’ This field holds the name of the specification. This field is also the primary key of this table. ‘channels’ The channels to be fetched by Cuirass as an SEXP string. ‘build_ouputs’ The build outputs to be saved by Cuirass as an SEXP string. ‘notifications’ The build notifications to be sent by Cuirass as an SEXP string. ‘period’ The specification periodicity as an integer. ‘priority’ The specification priority relatively to the other specifications, as an integer ranging from 0 to 9 where 0 is the higher priority and 9 the lowest. ‘systems’ The systems for which build jobs must be evaluated, as a comma separated list. 9.2 Checkouts ============= When a specification is processed, the repositories must be downloaded at a certain revision as specified. The download is called a checkout. The ‘Checkouts’ table stores the new checkouts for every specification when it is being processed. The ‘Checkouts’ table has the following columns: ‘specification’ The specification associated with the checkout. ‘revision’ The revision of the checkout. Within the same specification, two checkouts can’t be identical: they can’t have the same revision. ‘evaluation’ The evaluation that was triggered by the addition of that new checkout. ‘channel’ The channel associated with the checkout. ‘directory’ The directory into which the checkout was extracted. ‘timestamp’ The checkout insertion timestamp. 9.3 Evaluations =============== An evaluation relates a specification with the revision of the repository specified therein. Builds (see below) belong to a specific evaluation. The ‘Evaluations’ table has the following columns: ‘id’ This is an automatically incrementing numeric identifier. ‘specification’ This field holds the ‘name’ of a specification from the ‘Specifications’ table. ‘status’ This integer field hold the evaluation status. Possible values are: • started (‘-1’) • succeeded (‘0’) • failed (‘1’) • aborted (‘2’) ‘timestamp’ The timestamp at evaluation insertion. ‘checkout’ The timestamp after channel checkout. ‘evaltime’ The timestamp after evaluation completion. 9.4 Jobs ======== This table contains all the jobs associated with a given evaluation. If a new job produces build outputs that are not already stored inside the ‘Outputs’ table then, it is added to the ‘Builds’ table. ‘name’ This text field holds the job name. ‘evaluation’ This integer field references the evaluation identifier from the ‘Evaluations’ table, indicating to which evaluation this job belongs. ‘build’ This integer field references the build id from the ‘Builds’ table, corresponding to this job. ‘status’ This integer field holds the build status of the above build. The goal of this duplication is to avoid expensive joins between the Jobs and Builds table. ‘system’ This text field holds the system name of the above build. This field is duplicated for the same reason as the above status field. 9.5 Builds ========== This table holds records of the derivations and their build status. Note that a job will be registered here only if its derivation doesn’t already exist. ‘derivation’ This text field holds the absolute name of the derivation file that resulted in this build. ‘evaluation’ This integer field references the evaluation identifier from the ‘Evaluations’ table, indicating to which evaluation this build belongs. ‘job_name’ This text field holds the name of the job. ‘system’ This text field holds the system name of the derivation. ‘nix_name’ This text field holds the name of the derivation —e.g., ‘coreutils-8.24’. ‘worker’ This text field references the name of worker performing the build from the ‘Workers’ table. ‘log’ This text field holds the absolute file name of the build log file. ‘status’ This integer field holds the build status of the derivation. ‘last_status’ This integer field holds the build status of the previous job evaluation. ‘weather’ This integer field holds the weather of the build. Possible values are: • unknown (‘-1’) • new-success (‘0’) • new-failure (‘1’) • still-succeeding (‘2’) • still-failing (‘3’) ‘priority’ The build priority relatively to the other builds with the same ‘job_name’, as an integer ranging from 0 to 99 where 0 is the higher priority and 99 the lowest. ‘max_silent’ This integer field holds the number of seconds of silence after which a build process times out. ‘timeout’ This integer field holds the number of seconds of activity after which a build process times out. ‘timestamp’ This integer field holds a timestamp taken at build creation time. ‘starttime’ This integer field holds a timestamp taken at build start time. Currently, it has the same value as the ‘timestamp’ above. ‘stoptime’ This integer field holds a timestamp taken at build stop time. Currently, it has the same value as the ‘timestamp’ above. 9.6 BuildDependencies ===================== This table contains the dependencies between the builds registered in the ‘Builds’ table. ‘source’ This integer field holds a reference to the build ‘id’ from the ‘Builds’ table. ‘target’ This integer field holds a reference to the build ‘id’ from the ‘Builds’ table, indicating that the ‘source’ build id depends from the ‘target’ build id. 9.7 Outputs =========== This table keep tracks for every eventual build outputs. Each build stored in ‘Builds’ table may have zero (if it has failed), one or multiple outputs. ‘derivation’ This field holds the ‘derivation’ of a build from the ‘Builds’ table. ‘name’ This text field holds the name of the output. ‘path’ This text field holds the path of the output. 9.8 Metrics =========== This table contains several metrics that are recorded by the ‘metrics’ fiber periodically. ‘field’ This text field holds the application field of the metric. ‘type’ This integer field holds the type of the metric. ‘path’ This float field holds the value of the metric. ‘evaltime’ The metric insertion timestamp. 9.9 BuildProducts ================= This table contains the saved build products, that are proposed to download through the web interface. ‘build’ This integer field holds a reference to the build ‘id’ from the ‘Builds’ table, the build product belongs to. ‘type’ This text field holds the build product type. ‘file_size’ This integer field holds build product size in bytes. ‘checksum’ This text field holds the build product checksum. ‘path’ This text field holds the build product absolute store path. 9.10 Notifications ================== This table contains the notifications that are queued for sending. ‘id’ This is an automatically incrementing numeric identifier. ‘type’ This text field holds the SEXP representation of the notification. ‘build’ This integer fields references the build id associated with the notification. 9.11 Workers ============ This table contains the registered workers when Cuirass is using the remote building mechanism. ‘name’ This text field holds the worker name. This field is also the primary key of this table. ‘address’ This text field holds the worker IP address. ‘machine’ This text field holds the worker machine name. ‘systems’ This text field holds the systems that are supported by the worker, as a comma separated list of systems. ‘last_seen’ This integer field holds the timestamp of the last communication with the worker. 9.12 Dashboards =============== This table contains the user registered Dashboards. ‘id’ This is an automatically incrementing numeric identifier. ‘specification’ This field holds the ‘name’ of a specification from the ‘Specifications’ table. ‘jobs’ This text field holds a list of comma separated job names. 10 Contributing *************** Everyone is welcome to contribute to Cuirass. You can report bugs, send patches and share your ideas with others by sending emails the mailing list . Development is done using the Git distributed version control system. Thus, access to the repository is not strictly necessary. We welcome contributions in the form of patches as produced by ‘git format-patch’. Please write commit logs in the ChangeLog format (*note (standards)Change Logs::); you can check the commit history for examples. When posting a patch to the mailing list, use ‘[PATCH] ...’ as a subject. You may use your email client or the ‘git send-email’ command. We prefer to get patches in plain text messages, either inline or as MIME attachments. You are advised to pay attention if your email client changes anything like line breaks or indentation which could potentially break the patches. Appendix A GNU Free Documentation License ***************************************** Version 1.3, 3 November 2008 Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 0. PREAMBLE The purpose of this License is to make a manual, textbook, or other functional and useful document “free” in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others. This License is a kind of “copyleft”, which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software. We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. 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The operator of an MMC Site may republish an MMC contained in the site under CC-BY-SA on the same site at any time before August 1, 2009, provided the MMC is eligible for relicensing. ADDENDUM: How to use this License for your documents ==================================================== To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page: Copyright (C) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''. If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the “with...Texts.” line with this: with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation. If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software. Concept Index ************* * Menu: * authentication: Authentication. (line 663) * build offloading: Invocation. (line 445) * build offloading <1>: Invocation. (line 553) * builddependencies, database: Database. (line 1320) * buildproducts, database: Database. (line 1370) * builds, database: Database. (line 1246) * checkouts, database: Database. (line 1155) * cuirass badges: Badges. (line 260) * cuirass build modes: Build modes. (line 332) * cuirass database: Database. (line 1112) * cuirass notifications: Notifications. (line 211) * cuirass parameters: Parameters. (line 282) * cuirass specifications: Specifications. (line 89) * dashboards, database: Database. (line 1431) * evaluation trigger: Web Interface. (line 824) * evaluations, database: Database. (line 1185) * introduction: Introduction. (line 64) * jobs, database: Database. (line 1218) * license, GNU Free Documentation License: GNU Free Documentation License. (line 1467) * metrics, database: Database. (line 1352) * notifications, database: Database. (line 1392) * outputs, database: Database. (line 1335) * persistent configuration: Database. (line 1112) * postgresql database: Database. (line 1112) * register: Invocation. (line 415) * remote builds: Invocation. (line 445) * remote builds <1>: Invocation. (line 553) * remote-server: Invocation. (line 553) * remote-worker: Invocation. (line 621) * specifications, database: Database. (line 1123) * web: Invocation. (line 513) * web API: Web Interface. (line 737) * workers, database: Database. (line 1407)