HTCondor-CE

---

A site grid gatekeeper technology based solely on HTCondor components.

This package is simply a thin set of wrappers around HTCondor, allowing you to run a HTCondor-CE without disrupting a site HTCondor install.

For example, condor_ce_q is the HTCondor-CE equivalent to condor_q for the HTCondor-CE processes. This package took much of its inspiration - and base code - from OSGs condor-cron package.

Sites are encouraged to install the sub-package htcondor-ce-condor or htcondor-ce-pbs, depending on which batch manager they run.

Download

HTCondor-CE RPMs are available from the following locations:

• HTCondor Yum repositories: https://research.cs.wisc.edu/htcondor/yum/
• OSG Yum repositories: https://opensciencegrid.org/docs/common/yum/

Versioning

At any given time, two versions of HTCondor-CE are maintained, a stable and a development version. In this repository, the master branch contains the latest version of HTCondor-CE (i.e. development) while the stable branch contains the previous version.

• Development: HTCondor-CE 4
• Stable: HTCondor-CE 3

Issues

Please share any issues or questions regarding the HTCondor-CE via the following mailing lists:

• [email protected]: For issues and questions open to the community.
• [email protected]: For issues and questions containing private information.
• [email protected]: For issues regarding security problems/vunerabilities. For more information regarding reporting security problems go to HTCSS Security.

Diagrams

Below are diagrams to show the flow of a capacity allocation request in the form of a job submitted to an HTCondor-CE to being executed in a different batch system. Diagram A showcases a setup where the HTCondor-CE is located on the same host as the destination batch system. While Diagram B showcases a setup with the HTCondor-CE submitting a job to a remote batch system over SSH.

Note: In both setups the HTCondor-CE Schedd sends Master and Schedd Ads to the Central Collector

HTCondor-CE workflow (Diagram A)

flowchart LR

%% ID FORMAT:
%% - External nodes are numbered (0 - 100)
%% - Internal nodes are alphabetic (A - Z)
%% - Nodes within nested subgraphs are
%%   are labelled by double letters (AA - ZZ)
%% - All subgraph names are capitalized (Blahp)
%%   while nodes with the same name are lowercase (blahp)
subgraph HM[CE & Batch System Host Machine]
    subgraph HTCondor-CE
        %%direction LR %% Flowchart direction statement overrides statements in connected subgraphs; comment these out.
        A[[SchedD]] -- Original Job --> B(Job Router)
        B -- Routed Job --> A
        A -- Routed Job --> C{Grid Manager}
        %% Note: Used 1 to place Disk higher in ordering
        A -- </br>-Original Job Ad</br>-Routed Job Ad --> 1[(Disk)]
        subgraph Blahp
            %%direction LR
            %% Configure nested subgraphs above internal nodes
            subgraph slurm_*.sh
                direction LR %% Set direction of isolated subgraphs
                AA[submit] ---|OR| BB[cancel]
                BB ---|OR| CC[status]
            end
            E[[blahp]] --> slurm_*.sh
            F[common_sub</br>_attr.sh] -->|attrs| slurm_*.sh
            slurm_*.sh -->|args| F
        end
    end
    subgraph Batch System
        %%direction LR
        G((qsub))
    end
end
%% -- External Nodes --
0>Job Ad]
%% -- External Nodes --
%% -- Subgraph Links --
C <--> E
slurm_*.sh ---> G
0 --> A
%% Schedd connects to Global Central Collector
A == Ads ==> Z(((Central Collector)))
%% Stylize Outer host machine box
style HM fill:#FFF,stroke:#000
%% -- Subgraph Links --

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Bosco Cluster workflow (Diagram B)

In this setup where the HTCondor-CE submits to a remote batch system, incoming jobs are required to specify grid_resource = <batch> <system> <hostname>.

Note: The Blaph on the remote host works exactly the same as in Diagram A except that the Grid Manager communicates over SSH.

flowchart LR

%% ID FORMAT:
%% - External nodes are numbered (0 - 100)
%% - Internal nodes are alphabetic (A - Z)
%% - Nodes within nested subgraphs are
%%   are labelled by double letters (AA - ZZ)
%% - All subgraph names are capitalized (Blahp)
%%   while nodes with the same name are lowercase (blahp)
subgraph HM1[CE Host Machine]
    subgraph Bosco Cluster
        %%direction LR %% Flowchart direciton statement overrides statements in connected subgraphs; comment these out
        A[[SchedD]] -- Original Job --> Z(Job Router)
        Z -- Routed Job --> A
        A -- Routed Job --> B{Grid</br>Manager}
        B --- D[ssh]
        B --- E[ssh]
        E --> |File Transfer|B
        %% Note: Used 1 to place Disk higher in ordering
        A -- </br>-Original Job Ad</br>-Routed Job Ad --> 1[(Disk)]
    end
end
subgraph HM2[Remote Batch Sytem Host Machine]
    subgraph Remote Submit
        %%direction LR
        F[sshd] --> G[blahp]
        %% FTGahp capitalized to be legible
        H[sshd] --> I[FTGahp]
        I -- SSH Tunnel --> H
    end
end
%% -- External Nodes --
0>Job Ad]
%% -- External Nodes --
%% -- Subgraph Links --
D ===|Blahp:</br>-stdin</br>-stdout</br>-stderr| F
E ===|File:</br>-stdin</br>-stdout</br>-stderr| H
0 --> A
A == Ads ==> ZZ(((Central Collector)))
%% Stylize host machine boxes
style HM1 fill:#FFF,stroke:#000
style HM2 fill:#FFF,stroke:#000
%% -- Subgraph Links --

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