feat(rust): add a command to migrate a postgres database

| Conflicts:
|	implementations/rust/ockam/ockam_command/src/lib.rs
|	implementations/rust/ockam/ockam_command/src/subcommand.rs

| Conflicts:
|	implementations/rust/ockam/ockam_command/src/lib.rs
|	implementations/rust/ockam/ockam_command/src/subcommand.rs

implementations/rust/ockam/ockam_command/src/command_events.rs

@@ -6,7 +6,7 @@ use ockam_node::Executor;
 use opentelemetry::trace::{TraceContextExt, Tracer};
 use opentelemetry::{global, Context};
 use std::collections::HashMap;
-use tracing::error;
+use tracing::{error, warn};
 
 /// This function creates a journey event describing the execution of a command
 pub fn add_command_event(
@@ -24,9 +24,13 @@ pub fn add_command_event(
                     APPLICATION_EVENT_COMMAND,
                     sanitize_command_arguments(command_arguments),
                 );
-                cli_state
+                if let Err(e) = cli_state
                     .add_journey_event(JourneyEvent::ok(command_name), attributes)
                     .await
+                {
+                    warn!("cannot save a journey event: {}", e);
+                }
+                Ok::<(), ockam_core::Error>(())
             })
         })
         .into_diagnostic()??;
@@ -56,9 +60,13 @@ pub fn add_command_error_event(
                     APPLICATION_EVENT_COMMAND,
                     sanitize_command_arguments(command_arguments),
                 );
-                cli_state
+                if let Err(e) = cli_state
                     .add_journey_error(&command, message, attributes)
                     .await
+                {
+                    warn!("cannot save a journey event: {}", e);
+                }
+                Ok::<(), ockam_core::Error>(())
             })
         })
         .into_diagnostic()??;

implementations/rust/ockam/ockam_command/src/lib.rs

@@ -49,6 +49,7 @@ mod lease;
 mod manpages;
 mod markdown;
 mod message;
+mod migrate_database;
 pub mod node;
 mod operation;
 mod output;

implementations/rust/ockam/ockam_command/src/migrate_database/mod.rs

@@ -0,0 +1,60 @@
+use crate::docs;
+use crate::util::async_cmd;
+use crate::CommandGlobalOpts;
+use clap::Args;
+use miette::IntoDiagnostic;
+use ockam_core::errcode::{Kind, Origin};
+use ockam_core::Error;
+use ockam_node::database::node_migration_set::NodeMigrationSet;
+use ockam_node::database::{DatabaseConfiguration, MigrationSet, SqlxDatabase};
+use ockam_node::Context;
+
+const LONG_ABOUT: &str = include_str!("./static/long_about.txt");
+const AFTER_LONG_HELP: &str = include_str!("./static/after_long_help.txt");
+
+#[derive(Clone, Debug, Args)]
+#[command(
+    long_about = docs::about(LONG_ABOUT),
+    after_long_help = docs::after_help(AFTER_LONG_HELP)
+)]
+pub struct MigrateDatabaseCommand {
+    /// Report which migrations would be applied, but don't apply them
+    #[arg(short, long, default_value_t = false)]
+    dry_run: bool,
+}
+
+impl MigrateDatabaseCommand {
+    pub fn run(self, opts: CommandGlobalOpts) -> miette::Result<()> {
+        async_cmd(&self.name(), opts.clone(), |ctx| async move {
+            self.async_run(&ctx, opts).await
+        })
+    }
+
+    pub fn name(&self) -> String {
+        "migrate_database".into()
+    }
+
+    /// If a Postgres database is accessible, either:
+    ///   - Get the current migration status with the `--dry-run` option,
+    ///   - Or execute all the possible migrations and return the status after migration.
+    ///
+    /// This command returns true when used in scripts if the command successfully executed.
+    async fn async_run(&self, _ctx: &Context, opts: CommandGlobalOpts) -> miette::Result<()> {
+        match DatabaseConfiguration::postgres()? {
+            Some(configuration) => {
+                let db = SqlxDatabase::create_no_migration(&configuration).await?;
+                let migration_set = NodeMigrationSet::new(configuration.database_type());
+                let migrator = migration_set.create_migrator()?;
+                if !self.dry_run {
+                    migrator.migrate(&db.pool).await?;
+                };
+
+                let status = migrator.migration_status(&db.pool).await?;
+                opts.terminal.stdout().plain(&status).json_obj(&status)?.machine(status.up_to_date()).write_line()?;
+
+                Ok(())
+            },
+            None => Err(Error::new(Origin::Core, Kind::NotFound, "There is no postgres database configuration, or it is incomplete. Please run ockam environment to check the database environment variables".to_string())).into_diagnostic()?,
+        }
+    }
+}

implementations/rust/ockam/ockam_command/src/migrate_database/static/after_long_help.txt

@@ -0,0 +1,5 @@
+```sh
+# Migrate a Postgres database shared by multiple nodes.
+$ ockam migrate-postgres
+$ ockam migrate-postgres --dry-run
+```

implementations/rust/ockam/ockam_command/src/migrate_database/static/long_about.txt

@@ -0,0 +1 @@
+Migrate a Postgres database to the latest schema version.

implementations/rust/ockam/ockam_command/src/subcommand.rs

@@ -105,6 +105,7 @@ pub enum OckamSubcommand {
     Worker(WorkerCommand),
     Service(ServiceCommand),
     Message(MessageCommand),
+    MigrateDatabase(MigrateDatabaseCommand),
     SecureChannelListener(SecureChannelListenerCommand),
     SecureChannel(SecureChannelCommand),
     TcpListener(TcpListenerCommand),
@@ -151,6 +152,7 @@ impl OckamSubcommand {
             OckamSubcommand::Lease(c) => c.run(opts),
             OckamSubcommand::Authority(c) => c.run(opts),
             OckamSubcommand::Markdown(c) => c.run(),
+            OckamSubcommand::MigrateDatabase(c) => c.run(),
             OckamSubcommand::Worker(c) => c.run(opts),
             OckamSubcommand::Service(c) => c.run(opts),
             OckamSubcommand::Message(c) => c.run(opts),
@@ -295,6 +297,7 @@ impl OckamSubcommand {
             OckamSubcommand::Lease(c) => c.name(),
             OckamSubcommand::Authority(c) => c.name(),
             OckamSubcommand::Markdown(c) => c.name(),
+            OckamSubcommand::MigrateDatabase(c) => c.name(),
             OckamSubcommand::Worker(c) => c.name(),
             OckamSubcommand::Service(c) => c.name(),
             OckamSubcommand::Message(c) => c.name(),

implementations/rust/ockam/ockam_node/src/storage/database/migrations/migration_support/migration_result.rs

@@ -0,0 +1,70 @@
+use core::fmt::{Display, Formatter};
+use serde::Serialize;
+
+/// This enum models the result of executing one migration.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum MigrationResult {
+    /// The migration was successful
+    MigrationSuccess,
+    /// The migration had a failure
+    SomeMigrationError(MigrationFailure),
+}
+
+impl MigrationResult {
+    /// Create a success result
+    pub fn success() -> Self {
+        MigrationResult::MigrationSuccess
+    }
+
+    /// Create a failure for an incorrect checksum
+    pub fn incorrect_checksum(
+        description: String,
+        sql: String,
+        actual_checksum: String,
+        expected_checksum: String,
+    ) -> Self {
+        Self::SomeMigrationError(MigrationFailure::IncorrectChecksum(
+            description,
+            sql,
+            actual_checksum,
+            expected_checksum,
+        ))
+    }
+
+    /// Create a failure when a down migration was attempted
+    pub fn down_migration() -> Self {
+        Self::SomeMigrationError(MigrationFailure::DownMigration)
+    }
+
+    /// Create a failure when a migration failed for a given version
+    pub fn dirty_version() -> Self {
+        Self::SomeMigrationError(MigrationFailure::DirtyVersion)
+    }
+}
+
+/// This enum models possible causes for migration failures. Either for a simple migration or several.
+#[derive(Clone, Debug, Eq, PartialEq, Serialize)]
+pub enum MigrationFailure {
+    /// Description, sql, actual checksum, expected checksum
+    IncorrectChecksum(String, String, String, String),
+    /// A down migration was attempted
+    DownMigration,
+    /// The previous migration version failed to execute
+    DirtyVersion,
+}
+
+impl Display for MigrationFailure {
+    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
+        match self {
+            MigrationFailure::IncorrectChecksum(
+                description,
+                sql,
+                actual_checksum,
+                expected_checksum,
+            ) => write!(f, "❌ Incorrect checksum for the migration: {description}. Actual checksum: {actual_checksum}, expected checksum: {expected_checksum}.\nSQL statements\n{sql}")?,
+            MigrationFailure::DownMigration => write!(f, "A down migration was attempted")?,
+            MigrationFailure::DirtyVersion => write!(f, "This migration has already been executed and it failed")?,
+        }
+        Ok(())
+    }
+}

implementations/rust/ockam/ockam_node/src/storage/database/migrations/migration_support/migration_status.rs

@@ -0,0 +1,61 @@
+use crate::database::MigrationFailure;
+use crate::storage::database::migrations::migration_support::migrator::Version;
+use core::fmt::{Display, Formatter};
+use serde::Serialize;
+
+/// This enum models the state of a database with respect to migrations
+#[derive(Clone, Debug, Eq, PartialEq, Serialize)]
+pub enum MigrationStatus {
+    /// The database is up to date with the latest version.
+    UpToDate(Version),
+    /// The database needs to be updated.
+    Todo(Option<Version>, Version),
+    /// A migration was attempted but failed
+    Failed(Version, MigrationFailure),
+}
+
+impl Display for MigrationStatus {
+    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
+        match self {
+            MigrationStatus::UpToDate(version) => {
+                write!(f, "✅ The database is up to date (version: {})", version)?
+            }
+            MigrationStatus::Todo(current_version, next_version) => write!(
+                f,
+                "⚙️ The database needs to be updated ({}next version: {})",
+                current_version
+                    .map(|v| format!("current version: {v}, "))
+                    .unwrap_or("".to_string()),
+                next_version
+            )?,
+            MigrationStatus::Failed(version, reason) => write!(
+                f,
+                "❌ The database failed to be updated at version: {}.\nReason: {reason}",
+                version
+            )?,
+        };
+        Ok(())
+    }
+}
+
+impl MigrationStatus {
+    /// Create a new MigrationStatus::UpToDate
+    pub fn create_up_to_date(current_version: Version) -> Self {
+        MigrationStatus::UpToDate(current_version)
+    }
+
+    /// Create a new MigrationStatus::Todo
+    pub fn create_to_do(current_version: Option<Version>, next_version: Version) -> Self {
+        MigrationStatus::Todo(current_version, next_version)
+    }
+
+    /// Create a new MigrationStatus::Failed
+    pub fn create_failed(version: Version, failure: MigrationFailure) -> Self {
+        MigrationStatus::Failed(version, failure)
+    }
+
+    /// Return true if the database is up to date
+    pub fn up_to_date(&self) -> bool {
+        matches!(self, MigrationStatus::UpToDate(_))
+    }
+}