[receiver/journald] support reading from all journals#42721
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This commit adds the `merge` option to the configuration, when enabled, it allows reading from all journals, including remote ones. This is accomplished by passing the `--merge` CLI flag to `journalctl`.
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andrzej-stencel
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I'm not familiar with this option, but it exists and I suppose it's useful.
Thanks for the contribution Tiago!
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songy23
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#### Description Add mysef as codeowner for the `journaldreceiver`, the receiver is currently [in need of new maintainers](#42597) and I have been contributing where I can. I also meet the codeowner [requirements](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#requirements): 1. [Be a member of the OpenTelemetry organization.](https://github.com/open-telemetry/community/blob/main/guides/contributor/membership.md#member) - https://github.com/orgs/open-telemetry/people?query=belimawr 2. (Code Owner Discretion) It is best to have resolved an issue related to the component, contributed directly to the component, and/or review component PRs. How much interaction with the component is required before becoming a Code Owner is up to any existing Code Owners. My recent contributions to `journaldreceiver`: - #42721 - #42692 - #42774 - #43126 Because the `journaldreceiver` has no code owners, I'm tagging the folks who have been reviewing my PRs. cc: @andrzej-stencel @atoulme Co-authored-by: Andrzej Stencel <andrzej.stencel@elastic.co>
tommyers-elastic
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…43382) #### Description Add mysef as codeowner for the `journaldreceiver`, the receiver is currently [in need of new maintainers](open-telemetry#42597) and I have been contributing where I can. I also meet the codeowner [requirements](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#requirements): 1. [Be a member of the OpenTelemetry organization.](https://github.com/open-telemetry/community/blob/main/guides/contributor/membership.md#member) - https://github.com/orgs/open-telemetry/people?query=belimawr 2. (Code Owner Discretion) It is best to have resolved an issue related to the component, contributed directly to the component, and/or review component PRs. How much interaction with the component is required before becoming a Code Owner is up to any existing Code Owners. My recent contributions to `journaldreceiver`: - open-telemetry#42721 - open-telemetry#42692 - open-telemetry#42774 - open-telemetry#43126 Because the `journaldreceiver` has no code owners, I'm tagging the folks who have been reviewing my PRs. cc: @andrzej-stencel @atoulme Co-authored-by: Andrzej Stencel <andrzej.stencel@elastic.co>
ChrsMark
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Oct 20, 2025
…43382) #### Description Add mysef as codeowner for the `journaldreceiver`, the receiver is currently [in need of new maintainers](open-telemetry#42597) and I have been contributing where I can. I also meet the codeowner [requirements](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#requirements): 1. [Be a member of the OpenTelemetry organization.](https://github.com/open-telemetry/community/blob/main/guides/contributor/membership.md#member) - https://github.com/orgs/open-telemetry/people?query=belimawr 2. (Code Owner Discretion) It is best to have resolved an issue related to the component, contributed directly to the component, and/or review component PRs. How much interaction with the component is required before becoming a Code Owner is up to any existing Code Owners. My recent contributions to `journaldreceiver`: - open-telemetry#42721 - open-telemetry#42692 - open-telemetry#42774 - open-telemetry#43126 Because the `journaldreceiver` has no code owners, I'm tagging the folks who have been reviewing my PRs. cc: @andrzej-stencel @atoulme Co-authored-by: Andrzej Stencel <andrzej.stencel@elastic.co>
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Description
This commit adds the
mergeoption to the configuration, when enabled, it allows reading from all journals, including remote ones. This is accomplished by passing the--mergeCLI flag tojournalctl.Link to tracking issue
Fixes #39188
Testing
A unit test is added to the
Configstruct, the test ensures that if the configuration option is true, the correct CLI flag is added when callingjournalctlA manual test was also performed by configuring
systemd-journal-remoteon the server running the OTel collector andsystemd-journal-uploadon a remote server. With the changes from this PR the OTel collector is capable of ingesting the journal from all servers, including the remote one.For the manual test I used a couple of local VMs running Arch Linux and followed this tutorial to setup
systemd-journal-remote/systemd-journal-upload.