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https://github.com/ClusterCockpit/cc-backend
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Jan Eitzinger
GitHub
commit
445fe14ac8
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# Release versioning
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Releases are numbered with a integer id starting with 1.
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Every release embeds the following assets into the binary:
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* Web-frontend including javascript files and all static assets
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* Golang template files for server-side rendering
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* JSON schema files for validation
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Releases are numbered with an integer ID, starting with 1.
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Each release embeds the following assets in the binary:
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* Web front-end with Javascript files and all static assets.
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* Golang template files for server-side rendering.
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* JSON schema files for validation.
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* Database migration files
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Remaining external assets are:
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The remaining external assets are:
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* The SQL database used
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* The job archive
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* The configuration file `config.json`
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Both external assets are also versioned using integer ids.
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This means every release binary is tied to specific versions for the SQL
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database and job archive.
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A command line switch `--migrate-db` is provided to migrate the SQL database
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from a previous to the most recent version.
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We provide a separate tool `archive-migration` to migrate an existing job
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archive from the previous to the most recent version.
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Both external assets are also versioned with integer IDs.
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This means that each release binary is bound to specific versions of the SQL
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database and the job archive.
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The configuration file is validated against the current schema on startup.
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The command line switch `-migrate-db` can be used to upgrade the SQL database
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to migrate from a previous version to the latest one.
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We offer a separate tool `archive-migration` to migrate an existing job archive
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archive from the previous to the latest version.
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# Versioning of APIs
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cc-backend provides two API backends:
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* A REST API for querying jobs
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* A GraphQL API used for data exchange between web frontend and cc-backend
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* A GraphQL API for data exchange between web frontend and cc-backend
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Both APIs will also be versioned. We still need to decide if we also support
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older REST API version using versioning of the endpoint URLs.
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# How to build a specific release
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# How to migrate the SQL database
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# How to migrate the job archive
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Both APIs will also be versioned. We still need to decide wether we will also support
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older REST API version by versioning the endpoint URLs.
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# How to build
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Please always build `cc-backend` with the supplied Makefile. This will ensure
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that the frontend is also built correctly and that the version in the binary file is coded
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in the binary.
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@ -1,13 +1,13 @@
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# Overview
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To customize `cc-backend` means to change the logo and add specific legal texts
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in place of the placeholders. To change the logo shown in the navigation bar the
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file `web/frontend/public/img/logo.png` has to be replaced in the source tree
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and cc-backend has to be rebuild.
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Customizing `cc-backend` means changing the logo and certain legal texts
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instead of the placeholders. To change the logo displayed in the navigation bar, the
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file `web/frontend/public/img/logo.png` in the source tree must be replaced
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and cc-backend must be rebuild.
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# Replace legal texts
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To replace the legal texts `imprint.tmpl` and `privacy.tmpl` you can place your
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version in `./var/`. On startup `cc-backend` will check if `./var/imprint.tmpl` and/or
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`./var/privacy.tmpl` exist and use those instead of the builtin placeholders.
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You may use the placeholders in `web/templates` as blueprint.
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To replace the `imprint.tmpl` and `privacy.tmpl` legal texts, you can place your
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version in `./var/`. At startup `cc-backend` will check if `./var/imprint.tmpl` and/or
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`./var/privacy.tmpl` exist and use them instead of the built-in placeholders.
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You can use the placeholders in `web/templates` as a blueprint.
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In general an upgrade is not more then replacing the binary. All files that are
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required, apart from the database file, the configuration file and the job
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archive are embedded into the binary. It is recommended to use a directory where
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the binary filenames are named using some version tag. This may be, e.g., the date or
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unix epoch time. A symbolic link points to the version to be used. This allows
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to easily switch to previous versions.
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In general, an upgrade is nothing more than a replacement of the binary file.
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All the necessary files, except the database file, the configuration file and
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the job archive, are embedded in the binary file. It is recommended to use a
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directory where the file names of the binary files are named with a version
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indicator. This can be, for example, the date or the Unix epoch time. A symbolic
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link points to the version to be used. This makes it easier to switch to earlier
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versions.
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The database and the job archive are versioned. Every release binary supports
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specific versions of the database and the job archive. In case a version
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mismatch is detected the application will exit and a migration is required.
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The database and the job archive are versioned. Each release binary supports
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specific versions of the database and job archive. If a version mismatch is
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detected, the application is terminated and migration is required.
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**IMPORTANT NOTICE**
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**IMPORTANT NOTE**
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It is recommended to backup the database before any upgrade. It is mandatory
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to backup in case the database is migrated. Using sqlite this means to stop
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`cc-backend` and copy the sqlite database file somewhere.
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It is recommended to make a backup copy of the database before each update. This
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is mandatory in case the database needs to be migrated. In the case of sqlite,
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this means to stopping `cc-backend` and copying the sqlite database file
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somewhere.
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# Migrating the database
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After backing up the database execute the the following command to migrate the
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databse to the most recent version:
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After you have backed up the database, run the following command to migrate the
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database to the latest version:
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```
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$ ./cc-backend -migrate-db
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```
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The migration files are embedded into the binary but can be reviewed in the
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cc-backend [source tree](https://github.com/ClusterCockpit/cc-backend/tree/master/internal/repository/migrations).
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There are separate migration files for both supported database backends.
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The migration files are embedded in the binary and can also be viewed in the cc
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backend [source tree](https://github.com/ClusterCockpit/cc-backend/tree/master/internal/repository/migrations).
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There are separate migration files for both supported
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database backends.
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We use the [migrate library](https://github.com/golang-migrate/migrate).
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In case something goes wrong you can check the state and get the current schema
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If something goes wrong, you can check the status and get the current schema
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(here for sqlite):
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```
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$ sqlite3 var/job.db
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@ -37,38 +41,38 @@ In the sqlite console execute:
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.schema
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```
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to get the current databse schema.
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You can query the current version and if the migration failed with:
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You can query the current version and whether the migration failed with:
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```
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SELECT * FROM schema_migrations;
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```
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The first column indicates the current database version and the second column is
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a dirty flag indicating if the migration was successful.
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a dirty flag indicating whether the migration was successful.
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# Migrating the job archive
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To migrate the job archive a separate tool (`archive-migration`) is required that is part of the
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`cc-backend` source tree (build with `go build ./tools/archive-migration`) and also provided as part of releases.
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Job archive migration requires a separate tool (`archive-migration`), which is
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part of the cc-backend source tree (build with `go build ./tools/archive-migration`)
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and is also provided as part of the releases.
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Migration is only supported between two subsequent versions. The migration tool
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will migrate the existing job archive into a new job archive. This means there
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has to be enough disk space for two complete job-archives. If the tool is
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called without options:
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Migration is supported only between two successive releases. The migration tool
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migrates the existing job archive to a new job archive. This means that there
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must be enough disk space for two complete job archives. If the tool is called
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without options:
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```
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$ ./archive-migration
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```
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it is assumed that there is a job archive in `./var/job-archive`. The new job
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archive will be written to `./var/job-archive-new`. Because execution is
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threaded in case of a fatal error it is impossible to pinpoint in which job the
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error occured. In this case you can run the tool in debug mode (using the flag
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`-debug`). In debug mode threading will be disabled and the job id of every
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migrated job is printed. Jobs with empty files are skipped. Between multiple runs
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of the tools the directory `job-archive-new` has to be moved or deleted.
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it is assumed that a job archive exists in `./var/job-archive`. The new job
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archive is written to `./var/job-archive-new`. Since execution is threaded in case
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of a fatal error, it is impossible to determine in which job the error occurred.
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In this case, you can run the tool in debug mode (with the `-debug` flag). In
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debug mode, threading is disabled and the job ID of each migrated job is output.
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Jobs with empty files will be skipped. Between multiple runs of the tools, the
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`job-archive-new` directory must be moved or deleted.
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The cluster.json files in `job-archive-new` need to be reviewed for errors, in
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particular it has to be checked if the aggregation attribute is set correctly
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for all metrics.
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The `cluster.json` files in `job-archive-new` must be checked for errors, especially
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whether the aggregation attribute is set correctly for all metrics.
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The migration will take in the order of hours for fairly large (several hundred
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GB) job archives. A versioned job archive contains a file `version.txt` in the
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job archive root directory. This file contains the version as unsigned integer.
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Migration takes several hours for relatively large job archives (several hundred
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GB). A versioned job archive contains a version.txt file in the root directory
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of the job archive. This file contains the version as an unsigned integer.
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@ -12,18 +12,15 @@ Builds on:
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## Get started
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[Yarn](https://yarnpkg.com/) is recommended for package management.
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Due to an issue with Yarn v2 you have to stick to Yarn v1.
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Install the dependencies...
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```bash
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yarn install
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npm install
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```
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...then build using [Rollup](https://rollupjs.org):
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```bash
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yarn build
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npm run build
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```
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