Bash script to start Docker containers

This script works:

#!/bin/bash

for i in 1..10
 do echo “yes $i”
done

But when attempting to start several Docker containers it only starts the first container and exits:

docker_run.sh

#!/bin/bash

for i in 1..10
 do exec docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

The sleep 3 was added to give it time. Not sure if it matters. Of course the script has to run with sudo permissions.

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

asked Feb 14 at 19:26

justinnoor.io

367319

2

Why do you use exec command? Try to do it running directly docker

– Romeo Ninov
Feb 14 at 19:33

1

Yeah that was it. Thanks.

– justinnoor.io
Feb 14 at 19:44

add a comment |

This script works:

#!/bin/bash

for i in 1..10
 do echo “yes $i”
done

But when attempting to start several Docker containers it only starts the first container and exits:

docker_run.sh

#!/bin/bash

for i in 1..10
 do exec docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

The sleep 3 was added to give it time. Not sure if it matters. Of course the script has to run with sudo permissions.

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

asked Feb 14 at 19:26

justinnoor.io

367319

2

Why do you use exec command? Try to do it running directly docker

– Romeo Ninov
Feb 14 at 19:33

1

Yeah that was it. Thanks.

– justinnoor.io
Feb 14 at 19:44

add a comment |

This script works:

#!/bin/bash

for i in 1..10
 do echo “yes $i”
done

But when attempting to start several Docker containers it only starts the first container and exits:

docker_run.sh

#!/bin/bash

for i in 1..10
 do exec docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

The sleep 3 was added to give it time. Not sure if it matters. Of course the script has to run with sudo permissions.

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

asked Feb 14 at 19:26

justinnoor.io

367319

This script works:

#!/bin/bash

for i in 1..10
 do echo “yes $i”
done

But when attempting to start several Docker containers it only starts the first container and exits:

docker_run.sh

#!/bin/bash

for i in 1..10
 do exec docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

The sleep 3 was added to give it time. Not sure if it matters. Of course the script has to run with sudo permissions.

linux bash docker

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

asked Feb 14 at 19:26

justinnoor.io

367319

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

asked Feb 14 at 19:26

justinnoor.io

367319

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

edited Feb 14 at 19:33

Rui F Ribeiro

41.4k1481140

asked Feb 14 at 19:26

justinnoor.io

367319

asked Feb 14 at 19:26

justinnoor.io

367319

asked Feb 14 at 19:26

justinnoor.io

367319

2

Why do you use exec command? Try to do it running directly docker

– Romeo Ninov
Feb 14 at 19:33

1

Yeah that was it. Thanks.

– justinnoor.io
Feb 14 at 19:44

add a comment |

2

Why do you use exec command? Try to do it running directly docker

– Romeo Ninov
Feb 14 at 19:33

1

Yeah that was it. Thanks.

– justinnoor.io
Feb 14 at 19:44

Why do you use exec command? Try to do it running directly docker

– Romeo Ninov
Feb 14 at 19:33

Yeah that was it. Thanks.

– justinnoor.io
Feb 14 at 19:44

add a comment |

1 Answer
1

active

oldest

votes

To run many docker machines your script should be like this:

#!/bin/bash

for i in 1..10
 do docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

You should not use exec in this case as exec replaces the current process (your script) with the process resulting from executing its arguments (docker ...). This is why your script never gets past the first iteration.

edited Feb 14 at 20:12

Kusalananda

135k17255418

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

To run many docker machines your script should be like this:

#!/bin/bash

for i in 1..10
 do docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

edited Feb 14 at 20:12

Kusalananda

135k17255418

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

add a comment |

To run many docker machines your script should be like this:

#!/bin/bash

for i in 1..10
 do docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

edited Feb 14 at 20:12

Kusalananda

135k17255418

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

add a comment |

To run many docker machines your script should be like this:

#!/bin/bash

for i in 1..10
 do docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

edited Feb 14 at 20:12

Kusalananda

135k17255418

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

To run many docker machines your script should be like this:

#!/bin/bash

for i in 1..10
 do docker run —name docker-nginx$i -P -d nginx
 sleep 3
done

edited Feb 14 at 20:12

Kusalananda

135k17255418

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

edited Feb 14 at 20:12

Kusalananda

135k17255418

edited Feb 14 at 20:12

Kusalananda

135k17255418

edited Feb 14 at 20:12

Kusalananda

135k17255418

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

answered Feb 14 at 19:48

Romeo Ninov

6,58632028

add a comment |

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