diff --git a/README.md b/README.md index ba667d7..4534c32 100644 --- a/README.md +++ b/README.md @@ -1,8 +1,9 @@ # Colmena -![Build](https://github.com/zhaofengli/colmena/workflows/Build/badge.svg) +[![Manual](https://img.shields.io/badge/Manual-Pages-informational)](https://zhaofengli.github.io/colmena) +[![Build](https://github.com/zhaofengli/colmena/workflows/Build/badge.svg)](https://github.com/zhaofengli/colmena/actions/workflows/build.yml) -Colmena is a simple, stateless [NixOS](https://nixos.org) deployment tool modeled after [NixOps](https://github.com/NixOS/nixops) and [Morph](https://github.com/DBCDK/morph), written in Rust. +Colmena is a simple, stateless [NixOS](https://nixos.org) deployment tool modeled after [NixOps](https://github.com/NixOS/nixops) and [morph](https://github.com/DBCDK/morph), written in Rust. It's a thin wrapper over Nix commands like `nix-instantiate` and `nix-copy-closure`, and supports parallel deployment. Now with 100% more flakes! See *Tutorial with Flakes* below. @@ -36,7 +37,7 @@ nix-env -if default.nix *See Tutorial with Flakes for usage with Nix Flakes.* -Colmena should work with your existing NixOps and Morph configurations with minimal modification. +Colmena should work with your existing NixOps and morph configurations with minimal modification. Here is a sample `hive.nix` with two nodes, with some common configurations applied to both nodes: ```nix @@ -95,7 +96,7 @@ Here is a sample `hive.nix` with two nodes, with some common configurations appl }; host-b = { - # Like NixOps and Morph, Colmena will attempt to connect to + # Like NixOps and morph, Colmena will attempt to connect to # the remote host using the attribute name by default. You # can override it like: deployment.targetHost = "host-b.mydomain.tld"; @@ -126,7 +127,7 @@ Here is a sample `hive.nix` with two nodes, with some common configurations appl } ``` -The full set of options can be found at `src/nix/eval.nix`. +The full set of options can be found in [the manual](https://zhaofengli.github.io/colmena/stable/reference). Run `colmena build` in the same directory to build the configuration, or do `colmena apply` to build and deploy it to all nodes. ## Tutorial with Flakes @@ -167,118 +168,12 @@ Here is a short example: } ``` -The full set of options can be found at `src/nix/eval.nix`. +The full set of options can be found in [the manual](https://zhaofengli.github.io/colmena/stable/reference). Run `colmena build` in the same directory to build the configuration, or do `colmena apply` to build and deploy it to all nodes. -## `colmena eval` +## Manual -Sometimes you may want to extract values from your Hive configuration for consumption in another program (e.g., [OctoDNS](https://github.com/octodns/octodns)). -To do that, create a `.nix` file with a lambda: - -```nix -{ nodes, pkgs, lib, ... }: -# Feels like a NixOS module - But you can return any JSON-serializable value -lib.attrsets.mapAttrs (k: v: v.config.deployment.targetHost) nodes -``` - -Then you can evaluate with: - -``` -colmena eval your-lambda.nix -``` - -## `colmena apply-local` - -For some machines, you may still want to stick with the manual `nixos-rebuild`-type of workflow. -Colmena allows you to build and activate configurations on the host running Colmena itself, provided that: - -1. The node must be running NixOS. -1. The node must have `deployment.allowLocalDeployment` set to `true`. -1. The node's _attribute name_ must match the hostname of the machine. - -If you invoke `apply-local` with `--sudo`, Colmena will attempt to elevate privileges with `sudo` if it's not run as root. -You may also find it helpful to set `deployment.targetHost` to `null` if you don't intend to deploy to the host via SSH. - -As an example, the following `hive.nix` includes a node (`laptop`) that is meant to be only deployed with `apply-local`: - -```nix -{ - meta = { - nixpkgs = ./deps/nixpkgs-stable; - - # I'd like to use the unstable version of Nixpkgs on - # my desktop machines. - nodeNixpkgs = { - laptop = ./deps/nixpkgs-unstable; - }; - }; - - # This attribute name must match the output of `hostname` on your machine - laptop = { name, nodes, ... }: { - networking.hostName = "laptop"; - - deployment = { - # Allow local deployment with `colmena apply-local` - allowLocalDeployment = true; - - # Disable SSH deployment. This node will be skipped in a - # normal`colmena apply`. - targetHost = null; - }; - - # Rest of configuration... - }; - - server-a = { pkgs, ... }: { - # This node will use the default Nixpkgs checkout specified - # in `meta.nixpkgs`. - - # Rest of configuration... - }; -} -``` - -On `laptop`, run `colmena apply-local --sudo` to activate the configuration. - -## Secrets - -Colmena allows you to upload secret files to nodes that will not be stored in the Nix store. -It implements a subset of the `deployment.keys` options supported by NixOps. - -For example, to deploy DNS-01 credentials for use with `security.acme`: - -```nix -{ - shared-box = { - security.acme.certs."my-site.tld".credentialsFile = "/run/keys/acme-credentials.secret"; - deployment.keys."acme-credentials.secret" = { - # Alternatively, `text` (string) or `keyFile` (path to file) - # may be specified. - keyCommand = [ "vault" "read" "-field=env" "secret/dns01" ]; - - destDir = "/run/keys"; # Default: /run/keys - user = "acme"; # Default: root - group = "nginx"; # Default: root - permissions = "0640"; # Default: 0600 - - uploadAt = "pre-activation"; # Default: pre-activation, Alternative: post-activation - }; - # Rest of configuration... - }; -} -``` - -Take note that if you use the default path (`/run/keys`), the secret files are only stored in-memory and will not survive reboots. -To upload your secrets without performing a full deployment, use `colmena upload-keys`. - -## Parallelism - -Colmena is built from the ground up to support parallel deployments. -Evaluation, build, and deployment of node configurations can happen at the same time. -This parallelism can be controlled primarily through two flags: - -- `--limit `: Number of hosts to deploy at once in the final step (pushing closures and activating new profiles). -- `--eval-node-limit `: By default, Colmena will automatically determine the maximum number of nodes to evaluate at the same time according to available RAM. This flag allows you to set the limit to a predetermined value. +Read [the Colmena Manual](https://zhaofengli.github.io/colmena). ## Environment variables diff --git a/flake.nix b/flake.nix index 0434d85..7614ccb 100644 --- a/flake.nix +++ b/flake.nix @@ -17,8 +17,27 @@ pkgs = import nixpkgs { inherit system; }; in rec { # We still maintain the expression in a Nixpkgs-acceptable form - packages.colmena = import ./default.nix { inherit pkgs; }; defaultPackage = self.packages.${system}.colmena; + packages = rec { + colmena = import ./default.nix { inherit pkgs; }; + + manual = let + colmena = self.packages.${system}.colmena; + evalNix = import ./src/nix/eval.nix { + hermetic = true; + }; + deploymentOptionsMd = (pkgs.nixosOptionsDoc { + options = evalNix.docs.deploymentOptions pkgs; + }).optionsMDDoc; + metaOptionsMd = (pkgs.nixosOptionsDoc { + options = evalNix.docs.metaOptions pkgs; + }).optionsMDDoc; + in pkgs.callPackage ./manual { + inherit colmena deploymentOptionsMd metaOptionsMd; + }; + + manualFast = manual.override { colmena = null; }; + }; defaultApp = self.apps.${system}.colmena; apps.colmena = { @@ -28,6 +47,7 @@ devShell = pkgs.mkShell { inputsFrom = [ defaultPackage ]; + nativeBuildInputs = with pkgs; [ mdbook ]; shellHook = '' export NIX_PATH=nixpkgs=${pkgs.path} ''; diff --git a/manual/.gitignore b/manual/.gitignore new file mode 100644 index 0000000..7585238 --- /dev/null +++ b/manual/.gitignore @@ -0,0 +1 @@ +book diff --git a/manual/README.md b/manual/README.md new file mode 100644 index 0000000..9f28d3b --- /dev/null +++ b/manual/README.md @@ -0,0 +1,9 @@ +# Documentation + +You can read the rendered version [here](https://zhaofengli.github.io/colmena). + +## Building the Documentation + +The manual is rendered using [mdBook](https://github.com/rust-lang/mdBook). +To build the manual, do `nix build .#manual`. +You can also do `nix build .#manualFast` for a version without the CLI usage reference. diff --git a/manual/book.release.toml b/manual/book.release.toml new file mode 100644 index 0000000..ca09923 --- /dev/null +++ b/manual/book.release.toml @@ -0,0 +1,11 @@ +[book] +authors = ["Zhaofeng Li"] +language = "en" +multilingual = false +src = "src" +title = "Colmena RELEASE" + +[output.html] +site-url = "/colmena/RELEASE/" +git-repository-url = "https://github.com/zhaofengli/colmena" +edit-url-template = "https://github.com/zhaofengli/colmena/edit/main/manual/{path}" diff --git a/manual/book.toml b/manual/book.toml new file mode 100644 index 0000000..703e6ae --- /dev/null +++ b/manual/book.toml @@ -0,0 +1,11 @@ +[book] +authors = ["Zhaofeng Li"] +language = "en" +multilingual = false +src = "src" +title = "Colmena (Unstable)" + +[output.html] +site-url = "/colmena/unstable/" +git-repository-url = "https://github.com/zhaofengli/colmena" +edit-url-template = "https://github.com/zhaofengli/colmena/edit/main/manual/{path}" diff --git a/manual/default.nix b/manual/default.nix new file mode 100644 index 0000000..4af5b72 --- /dev/null +++ b/manual/default.nix @@ -0,0 +1,43 @@ +let + notFound = typ: "Error: No ${typ} passed to the builder"; +in + +{ stdenv, nix-gitignore, mdbook +, release ? null +, deploymentOptionsMd ? notFound "deployment options text" +, metaOptionsMd ? notFound "meta options text" +, colmena ? null +}: + +stdenv.mkDerivation { + inherit colmena deploymentOptionsMd metaOptionsMd release; + + name = if release == null then "colmena-manual-dev" else "colmena-manual-${release}"; + + src = nix-gitignore.gitignoreSource [] ./.; + + nativeBuildInputs = [ mdbook ]; + + patchPhase = '' + if [ -n "$release" ]; then + find . -name '*.md' -exec sed -i "/REMOVE_FOR_RELEASE/d" {} \; + sed "s/RELEASE/$release/g" book.release.toml > book.toml + fi + ''; + + buildPhase = '' + if [ -n "$colmena" ]; then + echo "Generating CLI help text" + $colmena/bin/colmena gen-help-markdown >> src/reference/cli.md + else + echo "Error: No colmena executable passed to the builder" >> src/reference/cli.md + fi + + echo "$deploymentOptionsMd" >> src/reference/deployment.md + echo "$metaOptionsMd" >> src/reference/meta.md + + mdbook build -d $out + ''; + + installPhase = "true"; +} diff --git a/manual/src/SUMMARY.md b/manual/src/SUMMARY.md new file mode 100644 index 0000000..a0120cb --- /dev/null +++ b/manual/src/SUMMARY.md @@ -0,0 +1,19 @@ +# Summary + +- [Introduction](./introduction.md) +- [Tutorial](./tutorial/index.md) + - [Usage with Flakes](./tutorial/flakes.md) + - [Migrating from NixOps/morph](./tutorial/migration.md) +- [Features](./features/index.md) + - [Node Tagging](./features/tags.md) + - [Local Deployment](./features/apply-local.md) + - [Secrets](./features/keys.md) + - [Ad Hoc Evaluation](./features/eval.md) + - [Parallelism](./features/parallelism.md) +- [Examples](./examples/index.md) + - [Multi-Architecture Deployments](./examples/multi-arch.md) +- [Reference](./reference/index.md) + - [Deployment Options](./reference/deployment.md) + - [Meta Options](./reference/meta.md) + - [Command Line Arguments](./reference/cli.md) +- [Contributing](./contributing.md) diff --git a/manual/src/contributing.md b/manual/src/contributing.md new file mode 100644 index 0000000..3833ddb --- /dev/null +++ b/manual/src/contributing.md @@ -0,0 +1,14 @@ +# Contributing + +Contributions are welcome! + +## Code + +You can checkout the source code and submit pull requests at [the GitHub repo](https://github.com/zhaofengli/colmena). + +By contributing code to Colmena, you agree that your contributions will be available under [the MIT License](https://github.com/zhaofengli/colmena/blob/main/LICENSE). + +## Issues & Feature Requests + +Bumped into a problem? We would like to fix it! +Please open a new issue at [the GitHub repo](https://github.com/zhaofengli/colmena). diff --git a/manual/src/examples/index.md b/manual/src/examples/index.md new file mode 100644 index 0000000..228f793 --- /dev/null +++ b/manual/src/examples/index.md @@ -0,0 +1,5 @@ +# Examples + +This section contains examples of setups people commonly use: + +- **[Multi-Architecture Deployments](multi-arch.md)** - Deploying to hosts running a foreign architecture diff --git a/manual/src/examples/multi-arch.md b/manual/src/examples/multi-arch.md new file mode 100644 index 0000000..ed219c1 --- /dev/null +++ b/manual/src/examples/multi-arch.md @@ -0,0 +1,36 @@ +# Multi-Architecture Deployments + +You can deploy to hosts running different architectures with a single configuration. +This requires you to either [set up remote builders](https://nixos.org/manual/nix/stable/advanced-topics/distributed-builds.html) running the foreign architecture(s), or [set up binfmt emulation](https://nixos.wiki/wiki/NixOS_on_ARM#Compiling_through_QEMU) on the host running Colmena. + +## `binfmt` Emulation + +This following example sets up binfmt, allowing an X86-64 host (`laptop`) to build derivations for an AArch64 host (`rpi`) through QEMU: + +```nix +{ + # The NixOS machine you are running Colmena on (x86_64-linux) + laptop = { pkgs, ... }: { + # Enable binfmt emulation for aarch64-linux + boot.binfmt.emulatedSystems = [ "aarch64-linux" ]; + + # ... Rest of configuration ... + }; + + # The remote machine running a foreign architecture (aarch64-linux) + rpi = { pkgs, ... }: { + # Override nixpkgs architecture + nixpkgs.system = "aarch64-linux"; + + # ... Rest of configuration ... + }; +} +``` + +*(For Flake users, the above attribute set is the value of `outputs.colmena`)* + +First, deploy the local configuration with `colmena apply-local --sudo`. +For more information on what is required on the local system, see [Local Deployment](../features/apply-local.md). + +After the new configuration is activated, binfmt emulation will be set up on the local machine. +You can then deploy to the `rpi` node with `colmena apply --on rpi`. diff --git a/manual/src/features/apply-local.md b/manual/src/features/apply-local.md new file mode 100644 index 0000000..00b7cfc --- /dev/null +++ b/manual/src/features/apply-local.md @@ -0,0 +1,52 @@ +# Local Deployment + +For some machines, you may still want to stick with the manual `nixos-rebuild`-type of workflow. +Colmena allows you to build and activate configurations on the host running Colmena itself, provided that: + +1. The node must be running NixOS. +1. The node must have `deployment.allowLocalDeployment` set to `true`. +1. The node's _attribute name_ must match the hostname of the machine. + +If you invoke `apply-local` with `--sudo`, Colmena will attempt to elevate privileges with `sudo` if it's not run as root. +You may also find it helpful to set `deployment.targetHost` to `null` if you don't intend to deploy to the host via SSH. + +As an example, the following `hive.nix` includes a node (`laptop`) that is meant to be only deployed with `apply-local`: + +```nix +{ + meta = { + nixpkgs = ./deps/nixpkgs-stable; + + # I'd like to use the unstable version of Nixpkgs on + # my desktop machines. + nodeNixpkgs = { + laptop = ./deps/nixpkgs-unstable; + }; + }; + + # This attribute name must match the output of `hostname` on your machine + laptop = { name, nodes, ... }: { + networking.hostName = "laptop"; + + deployment = { + # Allow local deployment with `colmena apply-local` + allowLocalDeployment = true; + + # Disable SSH deployment. This node will be skipped in a + # normal`colmena apply`. + targetHost = null; + }; + + # ... Rest of configuration ... + }; + + server-a = { pkgs, ... }: { + # This node will use the default Nixpkgs checkout specified + # in `meta.nixpkgs`. + + # ... Rest of configuration ... + }; +} +``` + +On `laptop`, run `colmena apply-local --sudo` to activate the configuration. diff --git a/manual/src/features/eval.md b/manual/src/features/eval.md new file mode 100644 index 0000000..f5ff19d --- /dev/null +++ b/manual/src/features/eval.md @@ -0,0 +1,32 @@ +# Ad Hoc Evaluation + +Sometimes you may want to extract values from your Hive configuration for consumption in another program (e.g., [OctoDNS](https://github.com/octodns/octodns)). +To do that, create a `.nix` file with a lambda: + +```nix +{ nodes, pkgs, lib, ... }: +# Feels like a NixOS module - But you can return any JSON-serializable value +lib.attrsets.mapAttrs (k: v: v.config.deployment.targetHost) nodes +``` + +Then you can obtain a JSON output with: + +```console +$ colmena eval target-hosts.nix +{"alpha":"fd12:3456::1","beta":"fd12:3456::2"} +``` + +You can also specify an expression directly on the command line: + +```console +$ colmena eval -E '{ nodes, pkgs, lib, ... }: ...' +``` + +## Instantiation + +You may directly instantiate an expression that evaluates to a derivation: + +```console +$ colmena eval --instantiate -E '{ nodes, ... }: nodes.alpha.config.boot.kernelPackages.kernel' +/nix/store/7ggmhnwvywrqcd1z2sdpan8afz55sw7z-linux-5.14.14.drv +``` diff --git a/manual/src/features/index.md b/manual/src/features/index.md new file mode 100644 index 0000000..2cd4b92 --- /dev/null +++ b/manual/src/features/index.md @@ -0,0 +1,9 @@ +# Features + +This section introduces the main features in Colmena: + +- **[Node Tagging](tags.md)** - Deploying to a subset of tagged nodes +- **[Local Deployment](apply-local.md)** - Deploying to the host running Colmena itself +- **[Secrets](keys.md)** - Deploying sensitive files separate from the main configuration +- **[Ad Hoc Evaluation](eval.md)** - Evaluating a Nix expression with access to your configuration +- **[Parallelism](parallelism.md)** - Controlling how Colmena parallelizes the deployment process diff --git a/manual/src/features/keys.md b/manual/src/features/keys.md new file mode 100644 index 0000000..6efe4c8 --- /dev/null +++ b/manual/src/features/keys.md @@ -0,0 +1,30 @@ +# Secrets + +Colmena allows you to upload secret files that will not be stored in the Nix store to nodes. +It implements a subset of the `deployment.keys` options supported by NixOps. + +For example, to deploy DNS-01 credentials for use with `security.acme`: + +```nix +{ + shared-box = { + security.acme.certs."my-site.tld".credentialsFile = "/run/keys/acme-credentials.secret"; + deployment.keys."acme-credentials.secret" = { + # Alternatively, `text` (string) or `keyFile` (path to file) + # may be specified. + keyCommand = [ "vault" "read" "-field=env" "secret/dns01" ]; + + destDir = "/run/keys"; # Default: /run/keys + user = "acme"; # Default: root + group = "nginx"; # Default: root + permissions = "0640"; # Default: 0600 + + uploadAt = "pre-activation"; # Default: pre-activation, Alternative: post-activation + }; + # Rest of configuration... + }; +} +``` + +Take note that if you use the default path (`/run/keys`), the secret files are only stored in-memory and will not survive reboots. +To upload your secrets without performing a full deployment, use `colmena upload-keys`. diff --git a/manual/src/features/parallelism.md b/manual/src/features/parallelism.md new file mode 100644 index 0000000..2e6c5e1 --- /dev/null +++ b/manual/src/features/parallelism.md @@ -0,0 +1,15 @@ +# Parallelism + +Colmena is built from the ground up to support parallel deployments. +Evaluation, build, and deployment of node configurations can happen at the same time. +This parallelism can be controlled primarily through two flags: + +**`--limit `** + +Number of hosts to deploy at once in the final step (pushing closures and activating new profiles). The default value is 10. + +**`--eval-node-limit `** + +By default, Colmena will automatically determine the maximum number of nodes to evaluate at the same time according to available RAM. +This flag allows you to set the limit to a predetermined value. + diff --git a/manual/src/features/tags.md b/manual/src/features/tags.md new file mode 100644 index 0000000..7d18ba7 --- /dev/null +++ b/manual/src/features/tags.md @@ -0,0 +1,35 @@ +# Node Tagging + +With node tags, you can quickly select a subset of nodes for deployment. +You can specify tags using the `deployment.tags` option: + +```nix +{ + alpha = { pkgs, ... }: { + deployment.tags = [ "web" "infra-lax" ]; + + # ... Rest of configuration ... + }; + beta = { pkgs, ... }: { + deployment.tags = [ "infra-sfo" ]; + + # ... Rest of configuration ... + }; +} +``` + +You can filter hosts by tags or names with `--on`, which accepts a comma-separated list of node names or @tags. + +To select all nodes with `web`: + +```console +$ colmena apply --on @web +``` + +Wildcards are supported as well. +To select all nodes with a tag beginning with `infra-`: + +```console +$ colmena apply --on '@infra-*' +``` +*(Note the quotes around the argument)* diff --git a/manual/src/introduction.md b/manual/src/introduction.md new file mode 100644 index 0000000..909b413 --- /dev/null +++ b/manual/src/introduction.md @@ -0,0 +1,26 @@ +# Introduction + +**Colmena** is a simple, stateless [NixOS](https://nixos.org) deployment tool modeled after [NixOps](https://github.com/NixOS/nixops) and [morph](https://github.com/DBCDK/morph), written in Rust. +It's a thin wrapper over Nix commands like `nix-instantiate` and `nix-copy-closure`, and supports parallel deployment. + +Interested? Get started [here](tutorial)! + +
$ colmena apply --on @tag-a +[INFO ] Enumerating nodes... +[INFO ] Selected 7 out of 45 hosts. + (...) ✅ 0s Build successful + sigma 🕗 7s copying path '/nix/store/h6qpk8rwm3dh3zsl1wlj1jharzf8aw9f-unit-haigha-agent.service' to 'ssh://root@sigma.redacted'... + theta ✅ 7s Activation successful + gamma 🕘 8s Starting... + alpha ✅ 1s Activation successful +epsilon 🕗 7s copying path '/nix/store/fhh4rfixny8b21l6jqzk7nqwxva5k20h-nixos-system-epsilon-20.09pre-git' to 'ssh://root@epsilon.redacted'... + beta 🕗 7s removing obsolete file /boot/kernels/z28ayg10kpnlrz0s2qrb9pzv82lc20s2-initrd-linux-5.4.89-initrd + kappa ✅ 2s Activation successful +
+ +You are currently reading **the unstable version** of the Colmena Manual, built against the tip of [the development branch](https://github.com/zhaofengli/colmena). + +## Links + +- [GitHub](https://github.com/zhaofengli/colmena) +- [Deployment Options Reference](reference/deployment.md) diff --git a/manual/src/reference/cli.md b/manual/src/reference/cli.md new file mode 100644 index 0000000..63816b1 --- /dev/null +++ b/manual/src/reference/cli.md @@ -0,0 +1,7 @@ +# Command Line Arguments + +You are currently reading **the unstable version** of the Colmena Manual, built against the tip of [the development branch](https://github.com/zhaofengli/colmena). + +The following are the auto-generated help messages that are printed when you invoke any sub-command with `--help`: + + diff --git a/manual/src/reference/deployment.md b/manual/src/reference/deployment.md new file mode 100644 index 0000000..d62f924 --- /dev/null +++ b/manual/src/reference/deployment.md @@ -0,0 +1,7 @@ +# Deployment Options + +You are currently reading **the unstable version** of the Colmena Manual, built against the tip of [the development branch](https://github.com/zhaofengli/colmena). + +Colmena adds a set of extra options that can be used in your NixOS configurations under the `deployment` prefix. + + diff --git a/manual/src/reference/index.md b/manual/src/reference/index.md new file mode 100644 index 0000000..c7c1de0 --- /dev/null +++ b/manual/src/reference/index.md @@ -0,0 +1,9 @@ +# Reference + +You are currently reading **the unstable version** of the Colmena Manual, built against the tip of [the development branch](https://github.com/zhaofengli/colmena). Go back to [the home page](../introduction.md) for links to other versions of the manual. + +This section contains detailed listings of options and parameters accepted by Colmena: + +- **[Deployment Options](deployment.md)** +- **[Meta Options](meta.md)** +- **[Command Line Arguments](cli.md)** diff --git a/manual/src/reference/meta.md b/manual/src/reference/meta.md new file mode 100644 index 0000000..11c3f87 --- /dev/null +++ b/manual/src/reference/meta.md @@ -0,0 +1,10 @@ +# Meta Options + +You are currently reading **the unstable version** of the Colmena Manual, built against the tip of [the development branch](https://github.com/zhaofengli/colmena). + +The following is a list of options that can be added to the `meta` attribute set. + +For compatibility with NixOps, you may name it `network` instead of `meta`. +However, you cannot specify both at the same time. + + diff --git a/manual/src/tutorial/flakes.md b/manual/src/tutorial/flakes.md new file mode 100644 index 0000000..8eb9884 --- /dev/null +++ b/manual/src/tutorial/flakes.md @@ -0,0 +1,75 @@ +# Usage with Flakes + +## Installation + +Colmena doesn't have a stable release yet. +To quickly try Colmena out, use the following command to enter an ephemeral environment with `colmena`: + +```console +$ nix shell github:zhaofengli/colmena +``` + +To install the latest development version to the user profile, use the following command: + +```console +$ nix-env -if https://github.com/zhaofengli/colmena/tarball/main +``` + +You can also add `github:zhaofengli/colmena` as an input in your Flake and add the `colmena` package to your `devShell`. + +## Basic Configuration + +Colmena reads the `colmena` output in your Flake. + +Here is a short example: + +```nix +{ + inputs = { + nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; + }; + outputs = { nixpkgs, ... }: { + colmena = { + meta = { + nixpkgs = import nixpkgs { + system = "x86_64-linux"; + }; + }; + + host-a = { name, nodes, pkgs, ... }: { + boot.isContainer = true; + time.timeZone = nodes.host-b.config.time.timeZone; + }; + host-b = { + deployment = { + targetHost = "somehost.tld"; + targetPort = 1234; + targetUser = "luser"; + }; + boot.isContainer = true; + time.timeZone = "America/Los_Angeles"; + }; + }; + }; +} +``` + +The full set of `deployment` options can be found [here](../reference/deployment.md). +For some inspiration, you can check out the short example in [the main tutorial](index.md). + +Now you are ready to use Colmena! To build the configuration: + +```console +$ colmena build +``` + +To build and deploy to all nodes: + +```console +$ colmena apply +``` + +## Next Steps + +- Head to the [Features](../features/index.md) section to see what else Colmena can do. +- Read more about options available in Colmena in the [Reference](../reference/index.md) section. diff --git a/manual/src/tutorial/index.md b/manual/src/tutorial/index.md new file mode 100644 index 0000000..5cd9492 --- /dev/null +++ b/manual/src/tutorial/index.md @@ -0,0 +1,125 @@ +# Tutorial + +## Installation + +Colmena doesn't have a stable release yet. +To install the latest development version to the user profile, use the following command: + +```console +$ nix-env -if https://github.com/zhaofengli/colmena/tarball/main +``` + +## Basic Configuration + +*If you use Nix Flakes, follow the Flake version [here](flakes.md).* + +Colmena should work with your existing NixOps and morph configurations with minimal modification (see [Migrating from NixOps/morph](migration.md)). + +Here is a sample `hive.nix` with two nodes, with some common configurations applied to both nodes: + +```nix +{ + meta = { + # Override to pin the Nixpkgs version (recommended). This option + # accepts one of the following: + # - A path to a Nixpkgs checkout + # - The Nixpkgs lambda (e.g., import ) + # - An initialized Nixpkgs attribute set + nixpkgs = ; + + # You can also override Nixpkgs by node! + nodeNixpkgs = { + node-b = ./another-nixos-checkout; + }; + + # If your Colmena host has nix configured to allow for remote builds + # (for nix-daemon, your user being included in trusted-users) + # you can set a machines file that will be passed to the underlying + # nix-store command during derivation realization as a builders option. + # For example, if you support multiple orginizations each with their own + # build machine(s) you can ensure that builds only take place on your + # local machine and/or the machines specified in this file. + # machinesFile = ./machines.client-a; + }; + + defaults = { pkgs, ... }: { + # This module will be imported by all hosts + environment.systemPackages = with pkgs; [ + vim wget curl + ]; + + # By default, Colmena will replace unknown remote profile + # (unknown means the profile isn't in the nix store on the + # host running Colmena) during apply (with the default goal, + # boot, and switch). + # If you share a hive with others, or use multiple machines, + # and are not careful to always commit/push/pull changes + # you can accidentaly overwrite a remote profile so in those + # scenarios you might want to change this default to false. + # deployment.replaceUnknownProfiles = true; + }; + + host-a = { name, nodes, ... }: { + # The name and nodes parameters are supported in Colmena, + # allowing you to reference configurations in other nodes. + networking.hostName = name; + time.timeZone = nodes.host-b.config.time.timeZone; + + boot.loader.grub.device = "/dev/sda"; + fileSystems."/" = { + device = "/dev/sda1"; + fsType = "ext4"; + }; + }; + + host-b = { + # Like NixOps and Morph, Colmena will attempt to connect to + # the remote host using the attribute name by default. You + # can override it like: + deployment.targetHost = "host-b.mydomain.tld"; + + # It's also possible to override the target SSH port. + # For further customization, use the SSH_CONFIG_FILE + # environment variable to specify a ssh_config file. + deployment.targetPort = 1234; + + # Override the default for this target host + deployment.replaceUnknownProfiles = false; + + # You can filter hosts by tags with --on @tag-a,@tag-b. + # In this example, you can deploy to hosts with the "web" tag using: + # colmena apply --on @web + # You can use globs in tag matching as well: + # colmena apply --on '@infra-*' + deployment.tags = [ "web" "infra-lax" ]; + + time.timeZone = "America/Los_Angeles"; + + boot.loader.grub.device = "/dev/sda"; + fileSystems."/" = { + device = "/dev/sda1"; + fsType = "ext4"; + }; + }; +} +``` + +The full set of `deployment` options can be found [here](../reference/deployment.md). + +Now you are ready to use Colmena! To build the configuration: + +```console +$ colmena build +``` + +To build and deploy to all nodes: + +```console +$ colmena apply +``` + +## Next Steps + +- Head to the [Features](../features/index.md) section to see what else Colmena can do. +- Read more about options available in Colmena in the [Reference](../reference/index.md) section. + diff --git a/manual/src/tutorial/migration.md b/manual/src/tutorial/migration.md new file mode 100644 index 0000000..e3723e8 --- /dev/null +++ b/manual/src/tutorial/migration.md @@ -0,0 +1,26 @@ +# Migrating from NixOps/morph + +Colmena should work with existing NixOps and morph configurations with minimal modification. +That said, there are a few things to look out for: + +## Colmena deploys to *existing* NixOS hosts + +Unlike NixOps which can be configured to manage the entire lifecycles of NixOS machines (e.g., spinning up AWS EC2 instances), Colmena can only deploy to hosts already running NixOS. + +## `network` vs `meta` + +Colmena accepts [a set of options](/reference/meta.md) to configure the deployment itself as `meta`. +For NixOps compatibility, it also accepts `network` as an alias so you don't have to change your existing configuration. + +## Pinning Nixpkgs + +You can pin the nixpkgs version by setting `meta.nixpkgs` (or `network.nixpkgs` if you use the alias). +This is required if you [use Flakes](flakes.md). +The options accepts one of the following: + +- Path to a Nixpkgs checkout *(not supported in Flakes)* + - Example: `./nixpkgs` +- The Nixpkgs lambda returned by importing its `default.nix` *(not supported in Flakes)* + - Example: `import ./nixpkgs` +- A fully initialized Nixpkgs attribute set + - Example: `import ./nixpkgs { system = "x86_64-linux"; }` diff --git a/manual/theme/highlight.js b/manual/theme/highlight.js new file mode 100644 index 0000000..1f32e13 --- /dev/null +++ b/manual/theme/highlight.js @@ -0,0 +1,1313 @@ +/*! + Highlight.js v11.3.1 (git: 2a972d8658) + (c) 2006-2021 Ivan Sagalaev and 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end of file diff --git a/src/nix/eval.nix b/src/nix/eval.nix index 3437655..d810e17 100644 --- a/src/nix/eval.nix +++ b/src/nix/eval.nix @@ -14,10 +14,10 @@ let defaults = {}; }; - types = lib.types; - # Hive-wide options - metaOptions = { lib, ... }: { + metaOptions = { lib, ... }: let + types = lib.types; + in { options = { name = lib.mkOption { description = '' @@ -44,7 +44,7 @@ let This option must be specified when using Flakes. ''; type = types.unspecified; - default = ; + default = if !hermetic then else null; }; nodeNixpkgs = lib.mkOption { description = '' @@ -88,7 +88,9 @@ let # Colmena-specific options # # Largely compatible with NixOps/Morph. - deploymentOptions = { name, lib, ... }: { + deploymentOptions = { name, lib, ... }: let + types = lib.types; + in { options = { deployment = { targetHost = lib.mkOption { @@ -152,7 +154,7 @@ let Secrets are transferred to the node out-of-band and never ends up in the Nix store. ''; - type = types.attrsOf keyType; + type = types.attrsOf (types.submodule keyType); default = {}; }; replaceUnknownProfiles = lib.mkOption { @@ -185,7 +187,9 @@ let }; }; - keyType = types.submodule { + keyType = { lib, ... }: let + types = lib.types; + in { options = { text = lib.mkOption { description = '' @@ -468,4 +472,22 @@ let in { inherit nodes deploymentConfigJson toplevel buildAll buildSelected introspect; meta = hive.meta; + + docs = { + deploymentOptions = pkgs: let + eval = pkgs.lib.evalModules { + modules = [ deploymentOptions ]; + specialArgs = { + name = "nixos"; + nodes = {}; + }; + }; + in eval.options; + + metaOptions = pkgs: let + eval = pkgs.lib.evalModules { + modules = [ metaOptions ]; + }; + in eval.options; + }; }